Skocz do pozycji: 1.

Tytuł:

Assessment Of Joints Using Friction Stir Welding And Refill Friction Stir Spot Welding Methods
Diagnostyka połączeń uzyskanych metodą tarciową (Friction Stir Welding) oraz zgrzewania z przemieszaniem materiału (Refill Friction Stir Spot)

Autorzy:

Lacki, P.
Więckowski, W.
Wieczorek, P.

Powiązania:

https://bibliotekanauki.pl/articles/352059.pdf

Data publikacji:

2015

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

friction stir welding
investigation
defects
FSW
diagnostyka złączy
defekty

Opis:

FSW (Friction Stir Welding) and RFSSW (Refill Friction Stir Spot Welding) joints have been increasingly used in industrial practice. They successfully replace fusion-welded, riveted or resistance-welded joints. In the last two decades, dynamic development of this method has stimulated investigations of the fast methods for joint diagnostics. These methods should be non-destructive and easy to be used in technological processes. The methods of assessment of joint quality are expected to detect discontinuities in the structures welded using FSW and FSSW methods. Reliable detection of flaws would substantially extend the range of applications of FSW joints across many sectors of industry, including aviation. The investigations carried out in this paper allowed for characterization of defects present in FSW and RFSSW joints. Causes of these defects were also stressed. An overview of the methodologies for assessment of joint quality was presented. Results of assessment of the quality of joints made of 2024T6 aluminium sheet metal using FSW and RFSSW method were presented.
Złącza FSW i RFSSW są coraz częściej stosowane w praktyce przemysłowej. Dobrze zastępują złącza spawane, nitowane czy zgrzewane oporowo. Dynamiczny rozwój metod w ostatnim dwudziestoleciu skutkuje poszukiwaniem szybkich metod diagnostyki złączy. Metody te powinny być nieniszczące oraz dać się zastosować podczas procesu technologicznego. Od sposobu oceny jakości złączy oczekuje się wykrycia nieciągłości struktur zgrzewanych metodą FSW i FSSW. Możliwość skutecznego wykrywania wad pozwoliłaby na znacznie szerszy zakres zastosowań złączy FSW w wielu sektorach przemysłu w tym w przemyśle lotniczym. Na podstawie przeprowadzonych badań w pracy przedstawiono charakterystykę defektów występujących w złączach FSW i RFSSW, wskazano na przyczyny ich występowania oraz przedstawiono przegląd metod badań umożliwiających ocenę jakości złączy. Zaprezentowano przykładowe wyniki oceny jakości złączy wykonanych z blach aluminiowych 2024T6 metodą FSW i RFSSW.

Źródło:

Archives of Metallurgy and Materials; 2015, 60, 3; 2297-2306
1733-3490

Pojawia się w:

Archives of Metallurgy and Materials

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:

Analysis of possible shipbuilding application of friction stir welding application of friction stir welding (FSW) method to joining elements made of AlZn5Mg1 alloy

Autorzy:

Dudzik, K.
Czechowski, M.

Powiązania:

https://bibliotekanauki.pl/articles/259115.pdf

Data publikacji:

2009

Wydawca:

Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa

Tematy:

aluminium alloys
friction stir welding

Opis:

In industrial practice the welding of Al- alloys is usually performed under pure argon shielding by means of MIG or TIG methods. In recent years new joining techniques such as friction stir welding (FSW) have appeared. Joints of EN AW-7020 T6 alloy elements welded by using FSW method have been tested. Results of static tensile tests, transverse bending tests as well as tests on stress corrosion susceptibility are presented. Parameters of friction welding (FSW) applied to joints of plates made of AlZn5Mg1[7020] alloy are given. Stress corrosion tests have been performed by using slow-strain-rate testing method (SSRT) in compliance with PN-EN ISO 7539-7 standard. The tests were conducted in air and 3.5% NaCl water solution. The following parameters have been measured during the tests: time to failure – T [h], maximum failure load – F [N], fracture energy (area under stress-elongation curve) – E [MJ/m3], relative elongation of specimen – A10 [%], maximum tensile stress – R [MPa], as well as percentage reduction of area – Z [%]. On the basis of the obtained test results it was concluded that the joints welded by means of FSW method show good resistance to stress corrosion at satsifactory strength properties, which indicates that application of friction welding by using FSW method in shipbuilding industry is purposeful.

Źródło:

Polish Maritime Research; 2009, 4; 38-41
1233-2585

Pojawia się w:

Polish Maritime Research

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:

Friction Stir Welding of Dissimilar Butt Joints with Novel Joint Geometry

Autorzy:

Jayabalakrishnan, D.
Balasubramanian, M.

Powiązania:

https://bibliotekanauki.pl/articles/1030596.pdf

Data publikacji:

2018-01

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

friction stir welding
aluminium
steel
joint geometry

Opis:

In this study, 1 mm thin sheets of AA 6061 and steel were welded by friction stir, with new joint geometry. Conventional friction stir welding develops high distortion to the specimen, particularly when the thickness is very small. In this process, friction stir welding is carried out by a tool without probe and with new joint geometry. Contrary to the conventional friction stir welding, where various tool profiles are used to obtain successful joints, the present study of investigation focused on developing a profile in the sheet metal edges to be joined. The aluminium sheet was positioned on the contoured steel sheet. Rotating tool with tilt angle was made to progress into the top sheet. Frictional heat plasticized the upper blank and the edges of the aluminium sheet were forged and extruded into the steel contour. The welding between steel and aluminium was due to a coalescence of the two materials and clamping effect was provided by the contour in the steel sheet. Tensile test was conducted to evaluate the quality of the welding along with macro and micro metallographic investigations. Further to this, scanning electron microscopy with energy dispersive X-ray and X-ray diffraction analysis have been done to understand the presence of intermetallics at the weld nugget. Tensile strength of 122.22 MPa was achieved. Intermetallics of Mg₂Si, MnAl₆ and FeAl₆, Al₅Fe₂ was found as dominant compound at the interface. Welding of thin sheets is enhanced by form clamping and chemical diffusion bonding.

Źródło:

Acta Physica Polonica A; 2018, 133, 1; 94-100
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:

Friction Stir Welding/Processing of High Entropy Alloys (HEAs)
Zgrzewanie tarciowe z przemieszaniem stopów o wysokiej entropii

Autorzy:

Mishra, Akshansh

Powiązania:

https://bibliotekanauki.pl/articles/1819236.pdf

Data publikacji:

2021

Wydawca:

Stowarzyszenie Inżynierów i Techników Mechaników Polskich

Tematy:

stop o wysokiej entropii
zgrzewanie tarciowe z przemieszaniem
high entropy alloy
HEA
friction stir welding
friction stir processing

Opis:

The composition of High Entropy Alloys is quite different from the existing classical engineering alloys because in near equiatomic ratios they contain multiple principal alloying elements. Design and development of high entropy alloys is very important to overcome the shortcomings of conventionally used alloys in applications where operating conditions of temperature and loading are extreme. High entropy alloys generally find applications in compressor blades of an aerospace engine, energy, and transportation industries due to its low density and high strength. In order to enhance the application of high entropy alloys, the proper selection of a feasible welding process is very important. It has been observed that when high entropy alloys are subjected to the welding process other than the Friction Stir Welding process then it will result in reduced overall strength and lower hardness in the fusion zone and heat-affected zone. In this recent paper, the application of Friction Stir Welding for joining the high entropy alloys and also using Friction Stir Processing for improving the mechanical and microstructure properties of high entropy alloys are discussed.
Projektowanie i opracowywanie stopów o wysokiej entropii jest bardzo ważne, aby przezwyciężyć niedociągnięcia konwencjonalnie stosowanych stopów w zastosowaniach, w których warunki pracy, takie jak temperatura i obciążenie, są ekstremalne. Stopy o wysokiej entropii zwykle znajdują zastosowanie w łopatkach sprężarek silników lotniczych, energetyce i transporcie ze względu na ich niską gęstość i wysoką wytrzymałość. Aby usprawnić stosowanie stopów o wysokiej entropii, bardzo ważny jest właściwy dobór możliwego do wykonania procesu spawania. Zaobserwowano, że gdy stopy o wysokiej entropii zostaną poddane procesowi spawania innemu niż proces zgrzewania tarciowego z mieszaniem, to spowoduje to zmniejszoną ogólną wytrzymałość i niższą twardość w strefie topienia i strefie wpływu ciepła. W artykule omówiono zastosowanie zgrzewania tarciowego z przemieszaniem do łączenia stopów o wysokiej entropii, a także zastosowanie tarciowej modyfikacji z przemieszaniem do poprawy właściwości mechanicznych i mikrostrukturalnych tych stopów.

Źródło:

Welding Technology Review; 2021, 93, 1; 27--33
0033-2364
2449-7959

Pojawia się w:

Welding Technology Review

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:

Characterization of Cu/SiC surface composite produced by friction stir processing

Autorzy:

Iwaszko, J.
Kudła, K.

Powiązania:

https://bibliotekanauki.pl/articles/202068.pdf

Data publikacji:

2020

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

copper
metal matrix surface composite
friction stir processing

Opis:

The main aim of this work was to obtain a copper matrix surface composite using friction stir processing (FSP). The reinforced phase was SiC particles with an average size of 5 mm. The effect of the reinforcement on the microstructure, hardness and wear behaviour were analysed. The friction treatment was carried out using a truncated cone-shaped tool with a threaded side surface. Multi-chamber technology was used to produce the composite microstructure in the copper surface layer. Changes in the material microstructure were assessed by light microscopy and scanning electron microscopy. Comparative measurement of the hardness of the initial and treated material as well as wear resistance tests were also carried out. A favourable effect of the surface treatment on the microstructure and properties of the copper was found. As a result of the friction treatment there was strong grain refinement in the copper surface layer. The average grain size in the stirring zone was about 3 mm and was over 21 times smaller than the average grain size in the initial material. Intensive dispersion of the SiC particles in the modified layer was also found, leading to the formation of a copper matrix composite. The effect of microstructural changes in the surface layer of the material and formation of the surface composite was an over two-fold increase in the hardness of the material and an increase in wear resistance.

Źródło:

Bulletin of the Polish Academy of Sciences. Technical Sciences; 2020, 68, 3; 555-564
0239-7528

Pojawia się w:

Bulletin of the Polish Academy of Sciences. Technical Sciences

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:

Discrete Wavelet Transformation Approach for Surface Defects Detection in Friction Stir Welded Joints

Autorzy:

Mishra, Akshansh

Powiązania:

https://bibliotekanauki.pl/articles/2105144.pdf

Data publikacji:

2020

Wydawca:

Sieć Badawcza Łukasiewicz - Instytut Lotnictwa

Tematy:

Machine Vision
Surface Defects
Friction Stir Welding
Python programming

Opis:

Friction Stir Welding joint quality depends on input parameters such as tool rotational speed, tool traverse speed, tool tilt angle and an axial force. Surface defects formation occurs when these input parameters are not selected properly. The main objective of the recent paper is to develop Discrete Wavelet Transform algorithm by using Python programming and further subject it to the Friction Stir Welded samples for the identification of various external surface defects present.

Źródło:

Fatigue of Aircraft Structures; 2020, 12; 27--35
2081-7738
2300-7591

Pojawia się w:

Fatigue of Aircraft Structures

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:

Badanie procesu tarciowej modyfikacji warstw wierzchnich z mieszaniem materiału na przykładzie stopu AK64
Investigation of Friction Stir Processing Process of AK64 aluminium alloy

Autorzy:

Węglowski, M. S.
Pietras, A.

Powiązania:

https://bibliotekanauki.pl/articles/210939.pdf

Data publikacji:

2012

Wydawca:

Wojskowa Akademia Techniczna im. Jarosława Dąbrowskiego

Tematy:

inżynieria
Friction Stir Processing
aluminium
engineering
friction stir processing

Opis:

Technologia tarciowej modyfikacji warstw wierzchnich z mieszaniem materiału (Friction Stir Processing - FSP) to nowa metoda wywodząca się z procesu zgrzewania Friction Stir Welding — FSW, która pierwotnie została opracowana dla stopów aluminium. Metoda FSP pozwala miejscowo modyfikować i kontrolować warstwy wierzchnie materiału. Proces ten powoduje intensywne odkształcenie plastyczne, mieszanie materiału i jego homogenizację w strefie mieszania. Technologia FSP z powodzeniem może być stosowana do rozdrabniania mikrostruktury, wytwarzania kompozytów oraz modyfikowania mikrostruktury materiałów. W pracy przedstawiono wyniki badań procesu FSP prowadzonego na odlewniczym stopie aluminium AK64. Badania obejmowały określenie wpływu warunków prowadzenia procesu na ciepło generowane w obszarze mieszania oraz wartość momentu działającego na narzędzie. Wyniki badań wykazały, że wzrost prędkości obrotowej narzędzia powoduje zmniejszenie momentu działającego na nie oraz zmniejszenie ilości ciepła generowanego w obszarze mieszania. Równocześnie wykazano, iż wzrost prędkości przesuwu narzędzia powoduje wzrost momentu oraz wzrost ilości generowanego ciepła. Z badań metalograficznych wynika, że głębokość oddziaływania narzędzia w dużym stopniu zależy od prędkości obrotowej narzędzia, a w mniejszym od prędkości jego przesuwu.
Friction Stir Processing (FSP), based on the general principles of friction stir welding (FSW) technology, is a solid state joining process originally developed for aluminium alloys. FSP is a technique which makes possible to obtain localized modification and control of microstructures in near - surface layers of processed materials. The FSP causes intense plastic deformation, material mixing, and thermal exposure, resulting in significant microstructural refinement, densification, and homogeneity of the processed zone. The FSP technique has been successfully used for producing the fine-grained structure and surface composite, modifying the microstructure of materials, and synthesizing the composite and intermetallic compound in situ. In the present paper, the results of FSP process for die casting aluminium alloy grade AK64 are presented. The investigations have covered the determination of the influence of conditions of FSP process on heat generation in the stir zone as well as the torque action on the tool. The results have revealed that the increase in rotational speed of a tool causes the decrease in torque and heat generation in the stir zone. Simultaneously, the results indicated that the increase in traveling speed of tool causes increase in torque and heat generation. The metallographic examination of modified surfaces has shown that penetration depth of shoulder depends, to a large extent, on the rotation speed and, to the smaller extent, on traveling speed.

Źródło:

Biuletyn Wojskowej Akademii Technicznej; 2012, 61, 1; 171-182
1234-5865

Pojawia się w:

Biuletyn Wojskowej Akademii Technicznej

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:

Examinations of Steel Overlap Joints Obtained Using the Friction Stir Welding Technology

Autorzy:

Więckowski, W.
Lacki, P.
Adamus, J.

Powiązania:

https://bibliotekanauki.pl/articles/356481.pdf

Data publikacji:

2019

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

friction stir welding
FSW
1.4541 steel

Opis:

The aim of the study was to analyse mechanical properties and microstructure of joints obtained using friction stir welding (FSW) technology. The focus of the study was on overlap linear FSW joints made of 1.4541 DIN 17441 steel sheets with thickness of 1.2 mm. Tools used during friction stir welding of steel joints were made of W-Re alloy. The joints were subjected to visual inspection and their load bearing capacity was evaluated by means of the tensile strength test with analysis of joint breaking mechanism. Furthermore, the joints were also tested during metallographic examinations. The analysis performed in the study revealed that all the samples of the FSW joints were broken outside the joint area in the base material of the upper sheet metal, which confirms its high tensile strength. Mean load capacity of the joints was 15.8 kN. Macroscopic and microscopic examinations of the joints did not reveal significant defects on the joint surface and in the cross-sections.

Źródło:

Archives of Metallurgy and Materials; 2019, 64, 1; 393-399
1733-3490

Pojawia się w:

Archives of Metallurgy and Materials

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:

Understanding the Effect of Multiple Traverse Feed during Friction Stir Welding Processes

Autorzy:

Shailesh Rao, A.
Yuvaraja, N.

Powiązania:

https://bibliotekanauki.pl/articles/352033.pdf

Data publikacji:

2018

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

friction stir welding
multiple pass of tool
microstructre
tensile strength

Opis:

The scope of this paper is to understand the effect of multiple pass of the tool during friction stir welding process of Al-17Si alloy and evaluate its microstructure and tensile strength. The rotational speed of 900 rpm with three different feed rates (50, 100, 150 mm/min) was selected for this process. The weld gap seen below the tool tip has been reduced drastically during the multiple pass and after the third pass the weld gap was invisible. With the increase in the feed rate, the adhesion was reduced between the tool pin circumference and diffused material, hence a small increase in the weld gap was observed. The substantiate changes in the microstructure was observed due to the severe formation of the metal during low feed rate. With the increase in the feed rate, some coarse grains were observed near and below the tool pin. The tensile strength during the multiple pass of the tool was studied and found better for lower feed rate. Further, the variation of the tool speeds (600, 900 and 1200 rpm) for constant feed rates of 100 mm/min were discussed. The more heat input improves plunging depth thereby reduces weld gap, but for higher heat input (tool rotation: 1200 rpm; feed rate: 100mm/min) increase in weld gaps was seen. The tensile properties for all the cases were discussed. The diffusion process, friction force and relative velocity pertaining to this process were highlighted finally.

Źródło:

Archives of Metallurgy and Materials; 2018, 63, 1; 203-210
1733-3490

Pojawia się w:

Archives of Metallurgy and Materials

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:

Microstructural Characterisation of Friction Stir Processed Cast AlSi9Mg Aluminium Alloy

Autorzy:

Węglowski, M. S.

Powiązania:

https://bibliotekanauki.pl/articles/379980.pdf

Data publikacji:

2014

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

cast aluminium alloy
friction stir processing
FSP
microstructure
stop aluminium
obróbka tarciowa
mikrostruktura

Opis:

Aluminium alloy castings become more popular when a refined microstructure and a uniform distribution of Si particles are easily produced. One of the technologies that can fulfil these requirements is Friction Stir Processing (FSP). Therefore, the formation of various microstructural regions during FSP of AlSi9Mg alloy has been studied. It is presented that each of the regions are characterized by unique microstructures. Prior to FSP, the microstructure of a representative as-cast aluminium alloy was composed of Al dendrites and a nonuniform distribution of Si and Fe. FSP microstructurally modified and significantly refined the as-cast material, effectively eliminating the microstructural segregation and porosity of the base material. The characteristic microstructures are reflected in the hardness distribution. The hardness of the modified area was different from the base material.

Źródło:

Archives of Foundry Engineering; 2014, 14, 3 spec.; 75-78
1897-3310
2299-2944

Pojawia się w:

Archives of Foundry Engineering

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 11.

Tytuł:

Properties of AW 5059 aluminium alloy joints welded by mig and Friction Stir Welding (FSW)

Autorzy:

Czechowski, M.

Powiązania:

https://bibliotekanauki.pl/articles/243771.pdf

Data publikacji:

2013

Wydawca:

Instytut Techniczny Wojsk Lotniczych

Tematy:

friction stir welding (FSW)
mechanical properties
aluminium alloys
stress corrosion cracking

Opis:

The article presents the results of the mechanical properties of aluminium alloy AW 5059 [AlMg5.5Zn] welded by MIG and friction stir welding FSW. Friction Stir Welding (FSW) – a new technology can be successfully used for butt welding of different types of aluminium alloy sheets. Research results on stress corrosion cracking for the AW 5059 alloy welded joints are presented. Stress corrosion cracking was examined via the slow-strain-rate-testing (SSRT) according to EN ISO 7539-7. The following parameters were measured: time-to-failure, obtained max. load, strain energy (the diagram surface under the stress-elongation curve), relative elongation of the specimen, tensile stress and reduction-in-area. The fractures were analysis by scanning electron microscope of Philips XL 30 type. Tests were carried out in the air and in a 3.5% water solution of NaCl – artificial sea water. On the basis of obtained test results, it can be said that 5059 alloy joints welded by FSW are resistant to stress corrosion in sea water. Tests have shown that the 5059 alloy, welded by FSW, has superior strength properties compared to the FSW 5083 alloy, along with comparable, good resistance to stress corrosion. Original value are received results of the mechanical and corrosion properties of a new method friction stir welding used for joining AW 5059 alloy sheets.

Źródło:

Journal of KONES; 2013, 20, 3; 125-129
1231-4005
2354-0133

Pojawia się w:

Journal of KONES

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 12.

Tytuł:

Własności zakładkowych złączy spajanych metodą zgrzewania tarciowego z przemieszaniem (FSW – Friction Stir Welding)
Properties of overlap joints welded by the Friction Stir Welding Method

Autorzy:

Kudła, K.
Wojsyk, K.
Kucharczyk, Z.

Powiązania:

https://bibliotekanauki.pl/articles/211415.pdf

Data publikacji:

2013

Wydawca:

Sieć Badawcza Łukasiewicz - Instytut Obróbki Plastycznej

Tematy:

zgrzewanie tarciowe przemieszaniem
aluminium
złącza zakładkowe
strefa natarcia
strefa spływu
friction stir welding
overlap joints
advancing zone
retreating zone

Opis:

Praca dotyczy problemu łączenia złączy zakładkowych wykonanych ze stopów aluminium technologią zgrzewania tarciowego z przemieszaniem FSW. Analizie poddano budowę złącza w strefach: natarcia, wpływu ciepła oraz spływu. Wykazano dużą niejednorodność i asymetrię złącza, charakteryzującą się wyraźną granicą między materiałem po rekrystalizacji i odkształceniu termomechanicznym. Próby ścinania ujawniły występowanie obszaru w strefie spływu, w którym występują przyklejenia między łączonymi elementami, obniżając jego wytrzymałość. W obszarze natarcia elementem decydującym o charakterze zniszczenia jest kształt linii styku łączonych materiałów. Dokonano analizy siły docisku oraz położenia narzędzia na jakość zgrzein. Wykazano, że najlepsze efekty łączenia uzyskuje się prowadząc proces zgrzewania z kontrolowaną siłą docisku i z zachowaniem odpowiedniego ustawienia kąta pochylenia oraz głębokości jego zanurzenia w materiale.
This paper regards the problem of creating overlap joints made of aluminum alloys using the technology of friction stir welding, FSW. The structure of a joint was analyzed in the advancing zone, the heat affected zone and the retreating zone. It was shown that the joint is nonuniform and asymmetric. The nonuniformity and asymmetry of the joint are characterized by a distinct border between material that was recrystallized and thermomechanically deformed. Shear tests demonstrated the existence of the area in the retreating zone where bonding between joined elements occurs. This reduces the joint strength. In the advancing zone, the shape of the boundary line between joined materials is the factor determining the character of material failure. The work analyzes the impact of downward force and tool position on the quality of welds. It was shown that for the welding process the best results can be achieved by controlling downward force and maintaining appropriate tilt angle and depth of tool penetration.

Źródło:

Obróbka Plastyczna Metali; 2013, 24, 3; 179-191
0867-2628

Pojawia się w:

Obróbka Plastyczna Metali

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 13.

Tytuł:

Numerical Simulations for Bobbin Tool Friction Stir Welding of Aluminum 6082-T6

Autorzy:

Hamilton, C.
Dymek, S.
Węglowska, A.
Pietras, A.

Powiązania:

https://bibliotekanauki.pl/articles/356155.pdf

Data publikacji:

2018

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

friction stir welding
bobbin tool
aluminum
simulation
temperature

Opis:

Aluminum 6082-T6 panels were joined by friction stir welding utilizing a bobbin tool. A thermal simulation of the process was developed based upon machine torque and the temperature dependent yield stress utilizing a slip factor and an assumed coefficie nt of friction. The torque-based approach was compared to another simulation established on the shear layer methodology (SLM), which does not require the slip factor or coefficient of friction as model inputs. The SLM simulation, however, only models hea t generation from the leading edges of the tool. Ultimately, the two approaches yielded matching temperature predictions as both methodologies predicted the same overall total heat generation from the tool. A modified shear layer approach is proposed that adopts the flexibility and convenience of the shear layer method, yet models heat generation from all tool/workpiece interfaces.

Źródło:

Archives of Metallurgy and Materials; 2018, 63, 3; 1115-1123
1733-3490

Pojawia się w:

Archives of Metallurgy and Materials

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 14.

Tytuł:

The application of friction stir welding (FSW) of aluminium alloys in shipbuilding and railway industry

Autorzy:

Gesella, G.
Czechowski, M.

Powiązania:

https://bibliotekanauki.pl/articles/245646.pdf

Data publikacji:

2017

Wydawca:

Instytut Techniczny Wojsk Lotniczych

Tematy:

Friction Stir Welding
FSW
aluminium alloys
welding
shipbuilding industry
mechanical properties

Opis:

The article describes possibilities of application of friction stir welding (FSW) in shipbuilding and railway industry. Actually, in these sectors of industry more and more often modern construction materials are used. The biggest restriction of implementing new materials is technological possibility of joining them. One of construction materials used in the shipbuilding is aluminum, mainly its alloy of 5xxx-aluminium-magnesium series. Its application is justified by good corrosion resistance in seawater and good mechanical attributes. Thanks to susceptibility to plastic treatment, one gains good mechanical attributes with thrice-smaller density than a density of steel, what causes triple reduction of weight of aluminum construction relative to steel one. Alloys of 5xxx series are well weldable. It is generally known that welding is not a good way to joint metals, especially the aluminum. The application of FSW with mixing allows one to change approach to production of aluminum constructions. Using aluminum plates prefabricated with FSW method allows one to reduce time needed for installation of construction and considerably decreases the production costs. The article describes technology and directions of development of friction welding of aluminum alloys of 5xxx series using FSW method. There is also shown analysis of its usefulness in ship and railway industry and comparison of mechanical attributes of weld made with electric arc using MIG (135), TIG (141) method and FSW method.

Źródło:

Journal of KONES; 2017, 24, 2; 85-90
1231-4005
2354-0133

Pojawia się w:

Journal of KONES

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 15.

Tytuł:

The Effect of Friction Stir Processing (FSP) on the Microstructure and Properties of AM60 Magnesium Alloy

Autorzy:

Iwaszko, J.
Kudła, K.
Fila, K.
Strzelecka, M.

Powiązania:

https://bibliotekanauki.pl/articles/355521.pdf

Data publikacji:

2016

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

friction stir processing
magnesium alloy

Opis:

The samples of the as-cast AM60 magnesium alloy were subjected to Friction Stir Processing (FSP). The effect of FSP on the microstructure of AM60 magnesium alloy was analyzed using optical microscopy and X-ray analysis. Besides, the investigation of selected properties, i.e. hardness and resistance to abrasion wear, were carried out. The carried out investigations showed that FSP leads to more homogeneous microstructure and significant grain refinement. The average grain size in the stirred zone (SZ) was about 6-9 μm. in the thermomechanically affected zone (TMAZ), the elongated and deformed grains distributed along flow line were observed. The structural changes caused by FSP lead to an increase in microhardness and wear resistance of AM60 alloy in comparison to their non-treated equivalents. Preliminary results show that friction stir processing is a promising and an effective grain refinement technique.

Źródło:

Archives of Metallurgy and Materials; 2016, 61, 3; 1555-1560
1733-3490

Pojawia się w:

Archives of Metallurgy and Materials

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 16.

Tytuł:

Joining of AA2014 and AA5059 dissimilar aluminium alloys by Friction Stir Welding

Autorzy:

Saleh, A. A.

Powiązania:

https://bibliotekanauki.pl/articles/368103.pdf

Data publikacji:

2019

Wydawca:

Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach

Tematy:

dissimilar aluminium alloys
friction stir welding
AA2014
AA5059
stopy aluminium
zgrzewanie tarciowe

Opis:

Purpose: This work aims to investigate the microstructure and mechanical properties achieved by FSW of butt joints, namely of dissimilar sheets namely of 2014-T3 to 5059-H11 Al alloys by bonding the two materials perpendicular to their rolling directions. Design/methodology/approach: AA 2014T3 and AA 5059H11 were two dissimilar aluminium alloys friction stir welded. The joint has been examined in terms of hardness, microstructure, and mechanical properties. The microstructure of the weld area was characterized by using optical microscopy. Seven diverse regions of the microstructure in the joint can be illustrious. Findings: It has been noticed that a structure of fine grain is formed in the nugget region as a consequence of recrystallization. The thermos mechanically affected and heat affected zones of aluminium alloy 2014 are characterized by the lowest hardness values in spite of there are a general hardness decrease through the weld zone compared to both base metals. The ultimate tensile strength values of the dissimilar joint were found to be varying between 54% to 66% those of the base metal. Research limitations/implications: The t joining in FSW takes place with the base materials remnant in the solid state, which gives a considerable possibility to produce joints between the alleged difficult-to-weld heat treatable aluminium alloys. Originality/value: The outcomes display that friction stir welding can be effectively applied for the joining of dissimilar aluminium alloys.

Źródło:

Journal of Achievements in Materials and Manufacturing Engineering; 2019, 97, 1; 15-20
1734-8412

Pojawia się w:

Journal of Achievements in Materials and Manufacturing Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 17.

Tytuł:

Microstructure and Mechanical Properties of Friction Stir Welded Joints between Commercially Pure Copper and Al 6351 Alloy

Autorzy:

Sinha, V. C.
Kundu, S.
Chatterjee, S.

Powiązania:

https://bibliotekanauki.pl/articles/350852.pdf

Data publikacji:

2017

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

friction stir welding
tensile strength
microstructure
intermetallics

Opis:

In the present study, the effect of tool rotational speed on microstructure and mechanical properties of friction stir welded joints between commercially pure copper and 6351 Al alloy was carried out in the range of tool rotational speeds of 300-900 rpm in steps of 150 rpm at 30 mm/minutes travel speed. Up to 450 rpm, the interface of the joints is free from intermetallics and Al₄ Cu₉ intermetallic has been observed at the stir zone. However, Al₄ Cu₉ intermetallic was observed both at the interface and the stir zone at 600 rpm. At 750 and 900 rpm tool rotational speed, the layers of AlCu, Al₂ Cu₃ and Al₄ Cu₉ intermetallics were observed at the interface and only Al₄ Cu₉ intermetallics has been observed in the stir zone. The maximum ultimate tensile strength of ~207 MPa and yield strength of ~168 MPa along with ~6.2% elongation at fracture of the joint have been obtained when processed at 450 rpm tool rotational speed.

Źródło:

Archives of Metallurgy and Materials; 2017, 62, 3; 1819-1825
1733-3490

Pojawia się w:

Archives of Metallurgy and Materials

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 18.

Tytuł:

Ultrasonic Assisted Active-Passive Filling Friction Stir Repairing to Eliminate Volume Defects

Autorzy:

Wang, Tao
Gong, Xue
Ji, Shude
Xue, Gang
Lv, Zan

Powiązania:

https://bibliotekanauki.pl/articles/2049431.pdf

Data publikacji:

2021

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

friction stir repairing
magnesium alloys
defects
ultrasonic
mechanical properties

Opis:

Ultrasonic assisted active-passive filling friction stir repairing (A-PFFSR) was proposed to repair volume defects in the metallic parts. Sound joints without interfacial defects could be achieved. Firstly, the ultrasonic was beneficial to improving material flow and atom diffusion, and then eliminated kissing bond defects compared to conventional A-PFFSR joints. Secondly, the equiaxed grains were refined by ultrasonic vibration. Lastly, the repairing passes were reduced due to the ultrasonic, which decreased softening degree of the repaired joints. The maximum tensile strength of 150 MPa was achieved. Therefore, this strategy to repair the volume defects is feasibility and potential in the remanufacturing fields of aerospace and transportation.

Źródło:

Archives of Metallurgy and Materials; 2021, 66, 1; 217-222
1733-3490

Pojawia się w:

Archives of Metallurgy and Materials

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 19.

Tytuł:

Design of Functionally Graded Composites through Friction Stir Processing

Autorzy:

Sai, B. V. Hima Sekhar

Powiązania:

https://bibliotekanauki.pl/articles/2052243.pdf

Data publikacji:

2021

Wydawca:

Politechnika Koszalińska. Wydawnictwo Uczelniane

Tematy:

friction stir processing
functionally graded material
reinforcements
multi-pass FSP
zgrzewanie tarciowe z przemieszaniem
funkcjonalny materiał gradientowy
wzmocnienie

Opis:

An Investigation was conducted to produce Aluminium based Functionally graded material (FGM) composites by Friction stir processing (FSP). A reinforcement strategy featuring the use of Alumina and TiC reinforcements was investigated, where holes were drilled in an Aluminium plate, filled with reinforcements and stirred using FSP. A mathematical model was formulated for the positioning of holes in such a manner that the composition of the reinforcements varies from maximum to minimum over a given length. Samples were subjected to various numbers of FSP passes from one to three with a 100% overlap and its influence on particle distribution and homogeneity was studied using Scanning electron microscopy (SEM) at cross sections parallel to the tool traverse direction. A progressive gradient in hardness values was observed for the surface composites at all the passes.

Źródło:

Journal of Mechanical and Energy Engineering; 2021, 5, 2; 95-102
2544-0780
2544-1671

Pojawia się w:

Journal of Mechanical and Energy Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 20.

Tytuł:

A Review on Aluminium Hybrid Surface Composite Fabrication Using Friction Stir Processing

Autorzy:

Patil, Namdev A.
Pedapati, Srinivasa Rao
Mamat, Othman Bin

Powiązania:

https://bibliotekanauki.pl/articles/356892.pdf

Data publikacji:

2020

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

Friction Stir Processing
aluminium hybrid surface composite
mechanical properties
tribological properties

Opis:

Nowadays, Aluminium (Al) based hybrid surface composites are amongst the fastest developing advanced materials used for structural applications. Friction Stir Processing (FSP) has emerged as a clean and flexible solid-state surface composites fabrication technique. Intensive research in this field resulted in numerous research output; which hinders in finding relevant meta-data for further research with objectivity. In order to facilitate this research need, present article summarizes current state of the art and advances in aluminium based hybrid surface composites fabrication by FSP with in-situ and ex-situ approach. Reported literature were read and systematically categorized to show impacts of different types of reinforcements, deposition techniques, hybrid reinforcement ratio and FSP machine parameters on microstructures, mechanical and tribological characteristics of different Al alloys. Challenges and opportunities in this field have been summarized at the end, which will be beneficial to researchers working onsolid state FSP technique.

Źródło:

Archives of Metallurgy and Materials; 2020, 65, 1; 441-457
1733-3490

Pojawia się w:

Archives of Metallurgy and Materials

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 21.

Tytuł:

Effects of Process Parameters on Tensile Shear Strength of Friction Stir Spot Welded Aluminium Alloy (EN AW 5005)
Wpływ parametrów procesu wytwarzania na wytrzymałość na ścinanie zgrzewanego tarciowo stopu aluminium (EN AW 5005)

Autorzy:

Kulekci, M. K.

Powiązania:

https://bibliotekanauki.pl/articles/354272.pdf

Data publikacji:

2014

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

friction stir spot welding (FSSW)
FSSW
friction stir welding
welding
aluminium
zgrzewanie tarciowe FSW
wytrzymałość na ścinanie
spawanie

Opis:

Aluminium and its alloys have been used in automotive technology since the first model of the car. The need for aluminium material is getting increased for weight reduction, improved fuel economy and vehicle performance. The amount of the aluminium used in a car is mainly related with joining processes of aluminium alloy. This can be achieved by developing the welding techniques for aluminium alloys. The purpose of this study was to determine the effects of friction stir spot welding parameters on tensile shear strength of friction stir spot welded lap joint EN AW 5005 Aluminium alloy. The variable parameters were tool rotation (rpm), dwell time (s) and the tool pin height (mm). Tensile shear test results indicated that the weld performance was significantly affected by the tool rotation, dwell time and the tool pin height. The results of the study indicates that there are optimum process parameters which give the highest tensile shear strength.
Aluminium i jego stopy są stosowane w produkcji samochodów od pierwszego modelu. Zapotrzebowanie na aluminium rośnie z powodu dążenia do zmniejszenia masy własnej pojazdu, zmniejszeniu zużycia paliwa i poprawy osiągów pojazdu. Ilość aluminium stosowanego w samochodzie jest głównie związana z procesem łączenia stopów aluminium. To może być osiągnięte poprzez rozwój technik spawalniczych dla atopów aluminium. Celem tej pracy było określenie wpły wu parametrów zgrzewania tarciowego FSW, na wytrzymałość na ścinanie zakładkowych złączy ze stopu aluminium EN AW 5005. Zmiennymi parametrami były prędkość obrotowa narzędzia (obr/min), czas (s) i wysokość trzpienia (mm). Wyniki testów ścinania wskazują, że jakość złącza jest istotnie uzależniona od prędkości obrotowej narzędzia, czasu i wysokości trzpienia. Wyniki tej pracy wskazują, że istnieją optymalne parametry zgrzewania tarciowego FSW, które dają najwyższą wytrzymałość na ścinanie.

Źródło:

Archives of Metallurgy and Materials; 2014, 59, 1; 221-224
1733-3490

Pojawia się w:

Archives of Metallurgy and Materials

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 22.

Tytuł:

The possibility of application thermography method for controlling friction stir welding of AW-5083 aluminium alloy sheets

Autorzy:

Dudzik, K.

Powiązania:

https://bibliotekanauki.pl/articles/242990.pdf

Data publikacji:

2017

Wydawca:

Instytut Techniczny Wojsk Lotniczych

Tematy:

Friction Stir Welding
FSW
thermography
monitoring
5xxx aluminium alloy
shipbuilding
termografia
monitorowanie
okrętownictwo

Opis:

The article presents the research results of thermography method used for monitoring process of friction stir welding of sheets made of AW-5083 aluminium alloy. Nowadays monitoring the temperature is used in many fields of science, including in the diagnosis of machining and joining processes such as turning, grinding, milling, welding, etc. Friction Stir Welding (FSW) – a new technology can be successfully used for butt-welding of different types of aluminium alloy sheets. FSW method can be an alternative to traditional arc welding methods i.e. MIG or TIG. The joining process was carried out on laboratory stand built on the basis of universal milling machine FWA-31. The parameters of joining AW-5083 alloy sheets chosen after optimization of the FSW process were presented. For determining temperature and its distribution in tool-workpieces contact area, noncontact infrared method was chosen. Infrared camera ThermoGear G100 produced by NEC Avio Infrared Technologies Co., Ltd. was used. The camera has two measuring ranges defined: -40-+120°C and 0-500°C. Average value of the temperature between the tool and joined metal sheets was about 380°C in case when correct parameters of welding were chosen. Controlling the temperature allow catch the moment when the material of joined sheets is plasticized (370°C ) which is best to start the linear moving of the tool and the same start of welding. The study can be the basis for the use of thermography method to monitor the process and determine the parameters of the friction stir welding for obtaining a high quality joint.

Źródło:

Journal of KONES; 2017, 24, 1; 121-127
1231-4005
2354-0133

Pojawia się w:

Journal of KONES

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 23.

Tytuł:

Analysis of structure and shear/peel strength of refill friction stir spot welded 7075-t6 aluminium alloy joints

Autorzy:

Kluz, R.
Kubit, A.
Wydrzyński, D.

Powiązania:

https://bibliotekanauki.pl/articles/102597.pdf

Data publikacji:

2017

Wydawca:

Stowarzyszenie Inżynierów i Techników Mechaników Polskich

Tematy:

spot welding
friction stir welding
aluminium alloy joining

Opis:

The article presents an analysis of the macrostructure and mechanical properties of spot welds of joints made by Refill Friction Spot Stir Welding (RFSSW) method. RFSSW is a relatively new technology that is gaining wider use, not only in the automotive and aviation industries because it is a less energy intensive method than resistance spot welding. The primary focus of the article is the effect of welding time on the quality of the welded joints of sheet metal using the aforementioned method. The research was conducted on a joint between two pieces of sheet metal of various thicknesses (1.6 mm and 0.8 mm) made of a common aviation grade aluminium alloy 7075-T6 Alclad. Metallographic sections of select variants were made in order to analyze the structure of the joint. Strength tests with a static load were conducted in different loading configurations. A traditional tensile strength test was conducted on the lap joint, which revealed a complex stress state within the joint and an analogous test was conducted with the use of a stiffening holder that ensured a pure shear state in the joint. Peel tests were also performed on the lap joints with using a special holder.

Źródło:

Advances in Science and Technology. Research Journal; 2017, 11, 3; 297-303
2299-8624

Pojawia się w:

Advances in Science and Technology. Research Journal

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 24.

Tytuł:

Development of Empirical Relationships for Prediction of Mechanical and Wear Behavior of Copper Matrix Surface Composite by Friction Stir Processing Technique

Autorzy:

Saravanakumar, S.
Gopalakrishnan, Saravanan
Kalaiselvan, K.

Powiązania:

https://bibliotekanauki.pl/articles/2049739.pdf

Data publikacji:

2021

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

friction stir processing
microstructure
microhardness
wear

Opis:

In this investigation, Copper Matrix Surface Composites (CMSCs) were reinforced with various ceramic particles like Aluminum Nitrate (AlN), Titanium diboride (TiB2), and Rice Husk Ash (RHA) are used to increase the metallurgical and mechanical properties by Friction Stir Processing (FSP). The Design of the Experiment (DOE) Taguchi L9 orthogonal array method was used. The process parameters considered were groove width and various types of reinforcement particles. The fabrication of CMSCs was achieved by using optimized process parameters, such as the tool transverse speed of 40 mm/min, rotational tool speed of 1000 rpm, and an axial load of 10 kN with one pass. The influence of FSP process parameters on CMSCs in the stir zone is observed through optical microscope (OM), Field Emission Scanning Electron Microscope (FESEM), and Transmission Electron Microscope (TEM). Mechanical properties such as microhardness and wear rate are studied and compared. It reveals that good interfacial bonding was produced between ceramic particles in CMSCs. TiB2 reinforced with copper matrix surface composites enhance microhardness and had a lesser wear rate.

Źródło:

Archives of Metallurgy and Materials; 2021, 66, 2; 617-626
1733-3490

Pojawia się w:

Archives of Metallurgy and Materials

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 25.

Tytuł:

The Application of Friction Stir Processing to the Fabrication of Magnesium-Based Foams

Autorzy:

Azizieh, M.
Pourmansouri, R.
Balak, Z.
Kafashan, H.
Mazaheri, M.
Kim, H. S.

Powiązania:

https://bibliotekanauki.pl/articles/354380.pdf

Data publikacji:

2017

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

metal foam
friction stir processing
porosity
magnesium

Opis:

In the present paper, friction stir processing (FSP) is used to fabricate magnesium-based nanocomposite foams. The effects of the number of FSP passes, TiH₂ to Al₂O₃ weight ratio, and foaming temperature; on the pore distribution and porosity are described. The results indicate that a minimum TiH₂ to Al₂O₃ weight ratio is necessary to provide the best pore distribution and porosity. Closed-cell porous magnesium with a porosity of about 17.5% was successfully fabricated using 4-pass FSP at 800 rpm, by adding 5 mass% TiH₂ and 3.5 mass% Al₂O₃; at a holding temperature of 858 K, and a holding time of 45 min.

Źródło:

Archives of Metallurgy and Materials; 2017, 62, 4; 1957-1962
1733-3490

Pojawia się w:

Archives of Metallurgy and Materials

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 26.

Tytuł:

Experimental investigation and modelling of Friction Stir Processing of cast aluminium alloy AlSi9Mg

Autorzy:

Węglowski, M. S.
Dymek, S.
Hamilton, C. B.

Powiązania:

https://bibliotekanauki.pl/articles/200339.pdf

Data publikacji:

2013

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

friction stir processing
aluminum alloys
numerical modelling
neural networks
microstructure

Opis:

Friction Stir Processing (FSP) is a novel solid state processing technique which can be used for microstructural modification of surface layers in metallic materials. This paper analyzes the effects of FSP process parameters on spindle torque acting on the tool and on the tool temperature. It has been shown that an increase in the rotational speed brings about a decrease in the torque and an increase of temperature. For temperature estimation in the stir zone a numerical model was applied, while for predicting a relationship between the spindle torque acting on the tool, rotational and travelling speeds and the down force, the artificial neural networks approach was employed. Light and electron (scanning and transmission) microscopy investigation showed that the FSP process reduces porosity and produces a more uniform distribution of second-phase particles.

Źródło:

Bulletin of the Polish Academy of Sciences. Technical Sciences; 2013, 61, 4; 893-904
0239-7528

Pojawia się w:

Bulletin of the Polish Academy of Sciences. Technical Sciences

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 27.

Tytuł:

Effect of friction stir processing (FSP) on microstructure and hardness of AlMg10/SiC composite

Autorzy:

Iwaszko, J.
Kudła, K.

Powiązania:

https://bibliotekanauki.pl/articles/200735.pdf

Data publikacji:

2019

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

friction stir processing
AlMg10/SiC composite
microstructure
kompozyt AlMg10/SiC
mikrostruktura
FSP

Opis:

The AlMg10 aluminum alloy reinforced with SiC particles was subjected to friction stir processing (FSP). The composite was made by mechanical mixing and gravity casting. The mass fraction of SiC particles in the composite was about 10%. Evaluation of the effects of FSP treatment was performed by means of light microscopy, scanning electron microscopy, EDS and hardness measurement. It was found that the inhomogeneous distribution of SiC particles and their agglomeration, which were observable in the cast composite, were completely eliminated after FSP modification. The treatment was also accompanied by homogenisation of the material in the mixing zone as well as fragmentation of both the matrix grain of the composite and SiC particles. In the case of SiC particles, a change in their shape was also observed. In the as-cast composite, particles with dimensions from 30 to 60 μm and a sharp-edged polyhedral shape prevailed, while in the material subjected to friction treatment, particles with dimensions from 20 to 40 μm and a more equiangular shape prevailed. Pores and other material discontinuities occurring frequently in the as-cast composite were completely eliminated after friction modification. The recorded changes in the microstructure of the material were accompanied by an increase in the hardness of the composite by nearly 35%. The conducted investigations have shown that FSP modification of the AlMg10/SiC composite made by the casting method leads to favorable microstructural changes in the surface layer and may be an alternative solution to other methods and technologies used in surface engineering.

Źródło:

Bulletin of the Polish Academy of Sciences. Technical Sciences; 2019, 67, 2; 185-192
0239-7528

Pojawia się w:

Bulletin of the Polish Academy of Sciences. Technical Sciences

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 28.

Tytuł:

Mechanical and microstructural properties of EN AW-6060 aluminum alloy joints produced by friction stir welding

Autorzy:

Küçükrendeci, I.

Powiązania:

https://bibliotekanauki.pl/articles/202032.pdf

Data publikacji:

2015

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

friction stir welding
microstructure
mechanical properties
aluminum alloys
spawanie
tarcie
mikrostruktury
właściwości mechaniczne
stopy aluminium

Opis:

In the study, the mechanical and microstructural properties of friction stir welded EN AW-6060 Aluminum Alloy plates were investigated. The friction stir welding (FSW) was conducted at tool rotational speeds of 900, 1250, and 1500 rpm and at welding speeds of 100, 150 and 180 mm/min. The effect of the tool rotational and welding speeds such properties was studied. The mechanical properties of the joints were evaluated by means of micro-hardness (HV) and tensile tests at room temperature. The tensile properties of the friction stir welded tensile specimens depend significantly on both the tool rotational and welding speeds. The microstructural evolution of the weld zone was analysed by optical observations of the weld zones.

Źródło:

Bulletin of the Polish Academy of Sciences. Technical Sciences; 2015, 63, 2; 475-478
0239-7528

Pojawia się w:

Bulletin of the Polish Academy of Sciences. Technical Sciences

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 29.

Tytuł:

Identifying Optimal Friction Stir Welding Process Parameters for 2024 Al Alloy Butt Joints

Autorzy:

Kluz, Rafał
Bucior, Magdalena
Kubit, Andrzej

Powiązania:

https://bibliotekanauki.pl/articles/102056.pdf

Data publikacji:

2019

Wydawca:

Stowarzyszenie Inżynierów i Techników Mechaników Polskich

Tematy:

design of an experiment
friction stir welding
aluminum alloy
projekt eksperymentu
zgrzewanie tarciowe
stop aluminium

Opis:

Friction stir welding (FSW) is a solid state joining process used to join metals and their alloys. The main goal of this paper was to select the optimal welding parameters such as: rotational speed and the feed rate of the tool. The article presents the results of the tests on welding 1 mm thick 2024 aluminum sheet according to the statistical 3-level completed plan PS/DK 32. The rotational speed of the tool varied within the range of 1100–1300 rpm and the feed rate within the range of 40–60 mm/min. For these parameters, the analyses of the experiment repeatability, impact significance and adequacy of equations were conducted.

Źródło:

Advances in Science and Technology. Research Journal; 2019, 13, 4; 48-53
2299-8624

Pojawia się w:

Advances in Science and Technology. Research Journal

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 30.

Tytuł:

Features of 2017A and AlSi9Mg aluminum alloys friction stir welded with root-side heating
Właściwości stopów 2017A i AlSi9Mg zgrzewanych metodą friction stir welding z podgrzewaniem grani zgrzeiny

Autorzy:

Mroczka, K.
Pietras, A.
Jura, J.

Powiązania:

https://bibliotekanauki.pl/articles/263855.pdf

Data publikacji:

2016

Wydawca:

Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH

Tematy:

aluminum alloys
friction stir welding
heating
structure
mechanical properties
stopy aluminium
nagrzewanie
struktura
właściwości mechaniczne

Opis:

Aluminum alloys 2017A and AlSi9Mg (hypo-eutectic silumin) were friction stir welded with a relatively high linear velocity (over 1 m/min) and use of an additional heat source from the root side of the weld. Macrostructure investigation (with high-resolution images) showed no effect of heating on weld quality. The welding process caused significant fragmentation of the secondary phases in the AlSi9Mg alloy. Furthermore, it was proven that the material above the weld nugget was not mixed and contained micro-defects that were not caused by welding. Also, it contained cavities on the boundaries between Si-particles and the matrix. Based on hardness distribution, a slight strengthening of the cast alloy was observed at the bottom and middle parts of the weld. However, the hardness of the 2017A alloy initially decreased and then increased due to natural aging. This means that the FSW process produced a metastable state in the alloy.
Stop aluminium 2017A i podeutektyczny silumin AlSi9Mg zgrzewano, stosując metodę friction stir welding (FSW). Zastosowano dużą prędkość liniową, powyżej 1 m/min, oraz dodatkowe podgrzewanie grani zgrzeiny. Badania makrostruktury wykazały brak wpływu podgrzewania na jakość złącza. Proces zgrzewania spowodował znaczną fragmentację faz występujących w stopie AlSi9Mg. Ponadto udowodniono, że materiał występujący powyżej jądra zgrzeiny nie jest mieszany i może zawierać mikrodefekty, które nie powstały w wyniku zgrzewania. Zaobserwowano również nieciągłości na granicach cząstek Si/osnowa. Na podstawie rozkładu twardości stwierdzono niewielkie umocnienie stopu odlewniczego pośrodku dolnej części zgrzeiny. Natomiast twardość stopu 2017A najpierw zmalała, a następnie wzrosła w wyniku starzenia naturalnego. To oznacza, że proces zgrzewania wytworzył metastabilny stan tego stopu.

Źródło:

Metallurgy and Foundry Engineering; 2016, 42, 2; 105-115
1230-2325
2300-8377

Pojawia się w:

Metallurgy and Foundry Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 31.

Tytuł:

Optimization of process parameters of friction stir welded AA5082-AA7075 butt joints using resonance fatigue properties

Autorzy:

Kumar, G.
Kumar, R.

Powiązania:

https://bibliotekanauki.pl/articles/200299.pdf

Data publikacji:

2020

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

friction stir welding
dissimilar Al welding
resonance fatigue analysis
fracture surface analysis
ANOVA

Opis:

In this work, experiments were carried out to quantify the behaviour of friction stir welded (FSW) AA5082-AA7075 butt joints under tensile loading and completely reversed fatigue loading. Different samples were prepared to identify optimum tool rotational and travel speeds to produce FSW AA5082-AA7075 butt joints with the maximum fatigue life. ANOVA was performed, which confirmed that both tool speed nad tool rotation speed affect the tensile strength of the weld. The samples exhibit a considerable difference in their fatigue life and tensile strenght. This difference can be accounted to the presence of welding defects such as surface defects and porosity. S-N curve plotted for the sample shows a significantly high fatigue life at the lower stress ranges. Fracture surfaces were also analysed under scanning electron microscope (SEM). Study of the fracture surface of the sample that failed under fatigue loading showed that the surface was mainly divided in two zones. The first zone was the area of fatigue crack growth where each stress cycle, slowly and gradually, helped in the growth of crack. The second zone was the region of fast fracture where the crack growth resulted in the failure of the joint instantaneously. The fracture surface study of the sample that failed under tensile loading showed that the mode of failure was ductile in nature.

Źródło:

Bulletin of the Polish Academy of Sciences. Technical Sciences; 2020, 68, 1; 99-108
0239-7528

Pojawia się w:

Bulletin of the Polish Academy of Sciences. Technical Sciences

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 32.

Tytuł:

The Effects of Friction Stir Welding Parameters on Microstructure, Fatigue Life and Tensile Properties of Aluminum 2024-T3 Alloy

Autorzy:

Şık, Aydın
Özer, Alpay

Powiązania:

https://bibliotekanauki.pl/articles/27313860.pdf

Data publikacji:

2023

Wydawca:

Polska Akademia Nauk. Czasopisma i Monografie PAN

Tematy:

friction stir welding
microstructure
fatigue life
tensile properties
Al 2024-T3

Opis:

In this study, Al 2024-T3 alloy plates were joined by using friction stir welding. Welding was performed at a rotational speed of 930, 1450, 2280 rpm and a welding feed rate of 180 mm min-1. The welded samples were analyzed at the microstructural level. Moreover, both bending fatigue tests and tensile tests were performed on samples. At the end of the microstructural examination of the samples welded at the rotational speed of 930 rpm and the welding feed rate of 180 mm min-1, the formation of tunnel defects was observed. The highest fatigue life was obtained at 2280 rpm and 180 mm min-1. The lowest fatigue life was obtained at 930 rpm and 180 mm min -1. The highest ultimate tensile stress was obtained at 2280 rpm/180 mm min-1 sample, which shows about a 12% reduction relative to the base material. The lowest ultimate tensile stress was obtained at 930 rpm/180 mm min-1 sample. The ultimate tensile stress value of the 930 rpm/180 mm min-1 sample decreased by approximately 25%.

Źródło:

Archives of Metallurgy and Materials; 2023, 68, 2; 499--505
1733-3490

Pojawia się w:

Archives of Metallurgy and Materials

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 33.

Tytuł:

Microstructure and mechanical properties of friction stir lap welded dissimilar Al/Ti alloys by ultrasonic assistance

Autorzy:

Dong, Zhibo
Zhang, Ziao
Hu, Wei
Gong, Peng
Lv, Zan

Powiązania:

https://bibliotekanauki.pl/articles/2048878.pdf

Data publikacji:

2022

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

friction stir lap welding
ultrasonic
intermetallic compounds
failure load
fracture

Opis:

Dissimilar Al/Ti alloy sheets were lap welded with ultrasonic assistance in this work. The influence of ultrasonic vibration on formation, intermetallic compounds (IMCs) and tensile failure load of the obtained joints was discussed. The results showed that voids formed at the lap interface without ultrasonic assistance. No voids can be observed on the joint welded with ultrasonic because the vibration during welding improved the material flow. No obvious IMC formed at the Al/Ti bonding interface of the joint welded without ultrasonic assistance. An IMC layer formed at the bonding interface of Al/Ti with ultrasonic assistance and its thickness increased with decreasing the welding speed. The failure load of the joint welded with ultrasonic assistance was higher than the joint without ultrasonic because the void was eliminated and the thin IMC layer formed at the bonding interface was beneficial to joint strength. All joints presented shear failure mode during the tensile shear tests.

Źródło:

Archives of Metallurgy and Materials; 2022, 67, 1; 91-96
1733-3490

Pojawia się w:

Archives of Metallurgy and Materials

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 34.

Tytuł:

Tribological Properties of Al 7075 Composite Reinforced with ZrB2 Using Grey Relational Analysis

Autorzy:

Karumuri, Srikanth
Das, Vemulapalli Chittaranjan
Gopi Krishna, Mallarapu

Powiązania:

https://bibliotekanauki.pl/articles/2201798.pdf

Data publikacji:

2022

Wydawca:

Stowarzyszenie Inżynierów i Techników Mechaników Polskich

Tematy:

Al 7075
dry sliding wear
stir casting technique
stir casting routing technique
wear
COF

Opis:

In this work, the authors investigate the optimal tribological parameters of Al 7075 composite reinforced with ZrB2 using Grey Relational Analysis (GRA). Initially, the composite specimens were prepared by the variation of reinforcement 5%, 10% and 15% using stir casting routing method. Further, the developed metal matrix composites are used to measure the wear and frictional properties on pin-on – disc testing apparatus. The input parameters such as, wt% of reinforcement (5%, 10% and 15%), load (4.92N, 9.81N and 14.72N) and the time required for conducting the wear test is (15 min. 30 min and 45 min). A Taguchi L9 orthogonal array was designed for conducting the number of experiments. Based on the combination of number of experiments wear study has been conducted on the wear testing apparatus. Moreover, GRA was used for obtaining the best optimal input control parameters that gives minimum magnitude of wear and coefficient of friction (COF). Finally, the confirmatory experiments are conducted and verified with the Taguchi grey relational analysis. The results shows that the predicated optimal mean value is almost similar to the experimental value.

Źródło:

Advances in Science and Technology. Research Journal; 2022, 16, 4; 22--28
2299-8624

Pojawia się w:

Advances in Science and Technology. Research Journal

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 35.

Tytuł:

Microstructure of Friction Stir Welded Dissimilar Wrought 2017A and Cast AlSi9Mg Aluminum Alloys

Autorzy:

Kopyściański, M.
Dymek, S.
Hamilton, C.
Węglowska, A.
Pietras, A.
Szczepanek, M.
Wojnarowska, M.

Powiązania:

https://bibliotekanauki.pl/articles/1032926.pdf

Data publikacji:

2017-05

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

friction stir welding
aluminum alloys
microstructure

Opis:

Friction stir welding was applied to join dissimilar aluminum alloys: wrought 2017A and cast AlSi9Mg. The produced weldment was free from cracks and any discontinuities. The weld microstructure was composed of alternating bands of the welded alloys; however, the alloy that was placed on the advancing side (AlSi9Mg) dominated the weld center. The grain size within the particular bands was similar in both alloys. The hardness profile reflected the microstructure formed during welding. The weld microstructure as well as the shape of hardness profile across the weld were justified by numerical simulation of material flow during welding.

Źródło:

Acta Physica Polonica A; 2017, 131, 5; 1390-1393
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 36.

Tytuł:

Effect of welding parameters on mechanical and microstructural properties of AL 2024 joints produced by friction stir welding

Autorzy:

Węglowski, M. S.
Pietras, A.
Węglowska, A.
welding, friction stir

Powiązania:

https://bibliotekanauki.pl/articles/246001.pdf

Data publikacji:

2009

Wydawca:

Instytut Techniczny Wojsk Lotniczych

Tematy:

aluminium alloy 2024
microstructural properties
mechanical properties
fatigue properties

Opis:

Results of Friction Stir Welding (FSW) of aluminium 2024 are presented in this paper. Investigations were conducted on the welding machine, built on the base of the conventional, vertical milling machine. The quality assessment of joints was done on the grounds of the visual inspection, tensile and fatigue tests, the analysis of the welds structure and hardness. Heat treatment was not done after the welding process. The goal of the research was to know the relationship between welding parameters and mechanical and microstructural properties of 2024joints. Results indicate that weldability of aluminium alloys of Al 2024 4 mm in thickness with FSW method is good. Properties ofjoints with the FSW method on the milling machine eąuipped with LOWSTIR device fulfil requirements of this kind of joints. The structure is correct and the tensile properties are higher than properties of arc welded joints. With wide range of welding parameters the high quality of joint is possible. Joints welded with the different tools and in different conditions had characteristic shape of nugget, heat affected zone and thermo-mechanically affected zone. The kind of tool is not affected on properties of FSW joint at the same parameters. The proper quality at four different kind of tool is possible to achieve. Fatigue properties of the FSW joints made in correct way are very high, higher than properties of arc welded joints. Hardness profile of welds had characteristic run, typical for joints welded with the FSW method. The LOWSTIR device is not getting worse the quality of FSW joints.

Źródło:

Journal of KONES; 2009, 16, 1; 523-532
1231-4005
2354-0133

Pojawia się w:

Journal of KONES

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 37.

Tytuł:

Selection of basic position in Refill Friction Stir Spot Welding of 2024-T3 and D16UTW aluminum alloy sheets

Autorzy:

Lacki, P.
Derlatka, A.
Gałaczyński, T.

Powiązania:

https://bibliotekanauki.pl/articles/351991.pdf

Data publikacji:

2017

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

Refill Friction Stir Spot Welding
RFSSW
aluminum alloy
basic position

Opis:

One of the important parameters of Refill Friction Stir Spot Welding is the so-called basic position of the tool. This is the arrangement of the pin and sleeve which occurs when the tool is plunged into the material. The basic positions can be divided into two categories. In the first category, the sleeve and the pin are above the sheet surface or below sheet surface and in the second category the pin is retracted within the sleeve or protrudes from it. The aim of the work was to test four settings of the basic position, and then determine the best setting of the basic position, without changing the other welding parameters. Joints made of an aluminum alloy 2024-T3 sheet having a thickness of 1.0 mm and an aluminum alloy D16UTW sheet having a thickness of 0.6 mm were analysed. The best setting of the basic position was determined based on assessment of the force carried in shear test, macrostructure and weld face of the joints.

Źródło:

Archives of Metallurgy and Materials; 2017, 62, 1; 443-449
1733-3490

Pojawia się w:

Archives of Metallurgy and Materials

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 38.

Tytuł:

An Analysis of Microstructure and Mechanical Properties on Friction Stir Welded Joint of Dissimilar 304 Stainless Steel and Commercially Pure Aluminium

Autorzy:

Balamagendiravarman, M.
Kundu, S.
Chatterjee, S.

Powiązania:

https://bibliotekanauki.pl/articles/353188.pdf

Data publikacji:

2017

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

friction stir welding
dissimilar materials
microstructure
mechanical properties
weld nugget

Opis:

In this study, friction stir welding of dissimilar 304 stainless steel and commercially pure aluminium was performed under the following condition of tool rotational speed 1000 rpm, traverse speed 60 mm/min and tool tilt angle 2 degree. Microstructural characterisation was carried out by optical microscope, scanning electron microscope (SEM). Optical images shows that the microstructural change is very minimum in steel side when compared to aluminium side due to the difference in mechanical and thermal properties. The intermetallic compound Al₃Fe was observed at the interfacial region and stir region of the welded joint. The maximum ultimate tensile strength is 78% of commercially pure aluminium base metal. Microhardness profile was measured across the weld interface and the maximum value reaches at the stir zone due to the formation of intermettalics.

Źródło:

Archives of Metallurgy and Materials; 2017, 62, 3; 1813-1817
1733-3490

Pojawia się w:

Archives of Metallurgy and Materials

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 39.

Tytuł:

Influence of Acoustic Emission Signals and Damage Analysis During the Tensile Test on Al8011 Hybrid Composites by Stir Casting Method

Autorzy:

Kannan, C. R.
Suresh, S.
Navaneetha Krishnan, M.

Powiązania:

https://bibliotekanauki.pl/articles/2203742.pdf

Data publikacji:

2023

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

Al8011
stir casting
acoustic emission
tensile
corrosion

Opis:

Metal network compounds have primary properties. The use of lightweight and low vitality is a testament to the growing interest in the automotive industry. Aluminum alloys, due to their advanced physical, mechanical and tribological properties, have become a highly emerging material for a variety of industrial applications and the importance of efficient material selection is explained. In this paper, an Al8011 hybrid metal matrix composite is developed through the stir casting process. The different weight proportions of B4C (3%, 6%, 9% & 12%) and fixed proportions of 2% MoS2 have been used. Composite developed are subjected to mechanical properties evaluation and seawater corrosion studies following standard procedures. To study the porosity of the composite samples, theoretical density and actual density are calculated. An acoustic emission system-assisted tensile test is carried out to report the strength of the composite. From this experimental method, adding reinforcement can increase the tensile strength and hardness of the composites. Under sea water, the increase in reinforcement found an increase in corrosion resistance. Fractured surfaces were perused using SEM and EDS analysis.

Źródło:

Archives of Metallurgy and Materials; 2023, 68, 1; 223--235
1733-3490

Pojawia się w:

Archives of Metallurgy and Materials

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 40.

Tytuł:

Experimental Investigation of Microstructure, Mechanical and Wear Characteristics of Cu-Ni/ZrC Composites Synthesized through Friction Stir Processing

Autorzy:

Velmurugan, T.
Subramanian, R.
Priyadharshini, G. Suganya
Raghu, R.

Powiązania:

https://bibliotekanauki.pl/articles/351128.pdf

Data publikacji:

2020

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

Cu-Ni/ZrC composite
Friction Stir Processing
mechanical properties
wear

Opis:

Friction Stir Process (FSP) was employed to develop Cupro-Nickel/Zirconium Carbide (Cu-Ni/ZrC) surface composites. Five different groove widths ranging from 0 to 1.4 mm were made in CuNi alloy plate to incorporate different ZrC volume fraction (0, 6, 12, 18 and 24 %) to study its influence on the structure and properties of Cu-Ni/ZrC composite. Processing was performed at a Tool Rotational Speed (TRS) of 1300 rpm, Tool Traverse Speed (TTS) of 40 mm/min with a constant axial load of 6 KN. The study is performed to analyse the influence of ZrC particles and the volume fraction of ZrC particles on the microstructural evolution, microhardness, mechanical properties, and tribological characteristics of the Cu-Ni/ZrC composite. The fracture and worn-out surfaces are analysed using Field Emission Scanning Electron Microscope (FESEM) to identify the fracture and wear mechanisms. The results demonstrated a simultaneous increase in microhardness and tensile strength of the developed composite because of grain refinement, uniform dispersion, and excellent bonding of ZrC with the matrix. Besides, the wear resistance increases with increase in volume fraction of ZrC particles in the composite. The surface morphology analysis revealed that the wear mechanism transits from severe wear regime to mild wear regime with increase in volume fraction of ZrC particles.

Źródło:

Archives of Metallurgy and Materials; 2020, 65, 2; 565-574
1733-3490

Pojawia się w:

Archives of Metallurgy and Materials

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 41.

Tytuł:

State of the Art of Ex-Situ Aluminium Matrix Composite Fabrication through Friction Stir Processing

Autorzy:

Gangil, N.
Siddiquee, A. N.
Maheshwari, S.
Al-Ahmari, A. M.
Abidi, M. H.

Powiązania:

https://bibliotekanauki.pl/articles/353721.pdf

Data publikacji:

2018

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

friction stir processing
aluminium alloys
ex-situ composites

Opis:

Aluminium metal matrix composites (AMMCs) are the fastest developing materials for structural applications. Friction Stir Processing (FSP) has evolved as a promising surface composite fabrication technique mainly because it is an eco-friendly and solid-state process. A spurt in the interest of research community and a resulting huge research output makes it difficult to find relevant information to further the research with objectivity. To facilitate this, the present article addresses the current state of the art and development in surface metal matrix fabrication through FSP with a specific focus on ex-situ routes. The available literature has been carefully read and categorized to present effects of particle size, morphology and elemental composition. The effect of various reinforcements on development of different functional characteristics is also discussed. Effect of main FSP parameters on various responses is presented with objectivity. Based on the studied literature concluding summary is presented in a manner in which the literature becomes useful to the researchers working on this important technology.

Źródło:

Archives of Metallurgy and Materials; 2018, 63, 2; 719-738
1733-3490

Pojawia się w:

Archives of Metallurgy and Materials

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 42.

Tytuł:

The investigation of suitable welding parameters in polypropylene sheets joined with friction stir welding

Autorzy:

Küçükrendeci, I.

Powiązania:

https://bibliotekanauki.pl/articles/200201.pdf

Data publikacji:

2019

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

friction stir welding
polypropylene sheets
Charpy impact test
Shore hardness
zgrzewanie tarciowe
arkusz polipropylenowy
test udarności Charpy'ego
twardość Shore'a

Opis:

Welding strength is very important in safe use of polypropylene sheets. The determination of welding parameters and design of the welding tool has an impact on the weld strength. The welding parameters can be determined experimentally. In this study, Charpy impact test is used to determine suitable welding parameters in welding of polypropylene sheets with FSW method. At the same time, the weld zone microstructure is examined and Shore hardness measurements are made. The impact tests were performed on samples cut from the welded sheets. The impact tests values and hardness values were presented graphically. According to the test results, some welded parts behaved similar to the matrix material. In some welding parameters, Charpy impact test values were obtained close to values of the main materials. The suitable welding parameters were determined for polypropylene sheets welding.

Źródło:

Bulletin of the Polish Academy of Sciences. Technical Sciences; 2019, 67, 1; 133-140
0239-7528

Pojawia się w:

Bulletin of the Polish Academy of Sciences. Technical Sciences

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 43.

Tytuł:

Optimization of friction stir processing parameters of aluminum alloy reinforced with hybrid nanoparticles using the Taguchi method

Autorzy:

Ali, Mohammed Sultan
Al Saffar, Iman Q.

Powiązania:

https://bibliotekanauki.pl/articles/27312410.pdf

Data publikacji:

2022

Wydawca:

Uniwersytet Zielonogórski. Oficyna Wydawnicza

Tematy:

stop aluminium
metoda Taguchi
tarcie
aluminum alloy
friction stir processing
nanoparticles
Taguchi method
ANOVA

Opis:

This study deals with the selection of optimum parameters for friction stir processing of Al alloy 6061-T6 reinforced with a hybrid nanoparticle (B4C and SiO2) in terms of their effect on the mechanical properties (hardness, tensile strength, and wear resistance) using Taguchi method. This work was carried out under four parameters each one running in three levels; rotational speeds (800, 1000 and 1200) rpm, travel speeds (10, 20, and 30) mm/min, holes depth (2, 2.5, and 3) mm, and mixing ratio of (SiO2/B4C) nanoparticles (1/1, 1/2, and 1/3), using L9 (34) Taguchi orthogonal array. Tensile strength and microhardness tests were conducted to evaluate the mechanical properties, in addition to the wear resistance test which is carried out using a pin-on-disk device. The microstructure was examined by optical microscopy, field emission scanning electron microscopy, and x-ray diffraction analysis. It was found that the highest tensile strength (223) MPa at 1200 rpm rotational speed, 30 mm/min traverse speed, 2.5 mm holes depth, and 1/2 (SiO2/B4C) nanoparticles mixing ratio, the highest hardness reached is (155) HV, then decreases in the direction of thermomechanically affected zone (TMAZ), heat affected zone (HAZ), and the base material at (1200) rpm rotational speed, (30) mm/min linear speed, a hole depth of (2) mm and (1/3) mixing ratio of (B4C/SiO2) nanoparticles. The wear behavior was of a mild type or an oxidative type at low loads (5 N), which became severe or metallic wear at higher loads (20 N) at fixed sliding time and speed. The (ANOVA) table has been used to determine which parameter is the most significant using MINITAB software.

Źródło:

International Journal of Applied Mechanics and Engineering; 2022, 27, 4; 13--25
1734-4492
2353-9003

Pojawia się w:

International Journal of Applied Mechanics and Engineering

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 44.

Tytuł:

A Comparative Study on Ballistic Behaviour of MWCNT / Graphene Reinforced AL6061 Surface Composites Fabricated Via Friction Stir Processing

Autorzy:

Magarajan, U.
Suresh Kumar, S.

Powiązania:

https://bibliotekanauki.pl/articles/27324483.pdf

Data publikacji:

2023

Wydawca:

Polska Akademia Nauk. Czasopisma i Monografie PAN

Tematy:

ballistic behaviour
friction stir processing
graphene
Multi Walled Carbon Nano Tubes
depth of penetration

Opis:

In this work, a comparative study on the ballistic behaviour of friction stir processed AL6061 targets had been made. Base Metal AL6061 (BM) plates with 25 mm thickness were friction stir processed by adding Multi Walled Carbon Nano Tubes (MWCNT) and Graphene (G), producing AL6061-MWCNT and AL6061-G surface composites. Optical microscopy and microhardness test on BM, AL6061-MWCNT and AL6061-G samples were performed as per the standard procedure. It was noticed that uniform dispersion of ceramic particles and refined grains were obtained for the friction stir processed surface composites. From the microhardness test, it was perceived that friction stir processing had induced strengthening of surface composites, hence increasing the microhardness of AL6061-MWCNT and AL6061-G by ~60.3% and ~73.6% respectively. Also, ballistic experiments were conducted at 680±10 m/s by impacting Ø7.62×51 mm projectiles. AL6063 backing plates were placed to compare the ballistic behaviours AL6061-MWCNT and AL6061-G targets by depth of penetration. It was noted that the depth of penetration of AL6061-MWCNT and AL6061-G targets were 37.81% and 65.84% lesser than the BM target. Further, from the results of Post ballistic microscopy it was observed that the microstructure near and away from the penetration channel edge looks unchanged in BM target. However, the AL6061-MWCNT and AL6061-G targets showed considerable change in their morphology, by forming Adiabatic Shear Bands.

Źródło:

Archives of Metallurgy and Materials; 2023, 68, 2; 541--550
1733-3490

Pojawia się w:

Archives of Metallurgy and Materials

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 45.

Tytuł:

Friction Stir Welding of Ultrathin AA2024-T3 Aluminum Sheets Using Ceramic Tool

Autorzy:

Myśliwiec, P.
Śliwa, R. E.
Ostrowski, R.

Powiązania:

https://bibliotekanauki.pl/articles/355870.pdf

Data publikacji:

2019

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

friction stir welding
aluminum alloys
ceramic tools
FSW force measurements
low-cycle fatigue test
FSW joint durability

Opis:

The paper presents the results of research work on linear FSW (Friction Stir Welding) joining aluminum alloys AA2024-T3 of 0.5 mm in thickness. The study was conducted on properly adapted numerical controlled 3 axis milling machine using a ceramic tool and special designed fastening device. The tool dimensions have been estimated according to the algorithm shown in the literature [4]. All joints were made of end-to end (butt) configuration under different welding speed. The rotational speed of the tool and tool offset was constant. The effect of selected technological parameters on the quality of the joint was analyzed. Produced butt joint have been subjected to a static tensile testing to identify mechanical features of the materials of joints compared to parent materials. Measurements of micro hardness HV in the plastically formed stir zone of joint and in the parent material have been carried out. Axial and radial welding forces in the joining region were recorded during the tests and their dependency from the welding parameters was studied. Based on the results of strength tests the efficiency of joints for sheets of 0.5 mm in thicknesses oscillated up to 96% compared to the parent material. It has been found that for given parameters the correct, free of defects joints were obtained. The paper also presents the results of low-cycle fatigue tests of obtained FSW joints. The use of a ceramic tool in the FSW process allows to obtain welds with higher strength than conventional tools. The results suggests that FSW can be potentially applied to joining aluminum alloys.

Źródło:

Archives of Metallurgy and Materials; 2019, 64, 4; 1385-1394
1733-3490

Pojawia się w:

Archives of Metallurgy and Materials

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 46.

Tytuł:

Regression modeling and neural computing for predicting the ultimate tensile strength of friction stir welded aerospace aluminium alloy

Autorzy:

Mishra, Akshansh
Vance, Jonathan Ve

Powiązania:

https://bibliotekanauki.pl/articles/95289.pdf

Data publikacji:

2019

Wydawca:

Politechnika Koszalińska. Wydawnictwo Uczelniane

Tematy:

artificial neural networks
regression model
friction stir welding
sztuczne sieci neuronowe
model regresji
zgrzewanie tarciowe

Opis:

AA7075 is an aluminum alloy which is almost as strong as steel, yet it weighs just one third as much. Unfortunately its use has been limited, due to the fact that pieces of it could not be securely welded together by the traditional welding process. Friction Stir Welding (FSW) process overcomes the limitations of conventional welding process. In our present work we have used Artificial Neural Network which is Artificial Intelligence based technique used for prediction purpose. The main objective of our present work is to compare the predicted results of the Ultimate Tensile Strength (UTS) of Friction Stir welded similar joints through Regression modeling and Artificial Neural Network (ANN) modeling. It was observed that the linear regression algorithm is able to make more accurate predictions compared to neural network algorithm for small dataset.

Źródło:

Journal of Mechanical and Energy Engineering; 2019, 3, 3; 221-226
2544-0780
2544-1671

Pojawia się w:

Journal of Mechanical and Energy Engineering

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 47.

Tytuł:

Wpływ nowych narzędzi organów KAS (kasy rejestrujące i wirtualne online, SENT, STIR, JPK_VAT, KSeF) na nadzór nad podatkiem dochodowym od osób fizycznych
The impact of new tools of KAS authorities (online cash registers and virtual cash registers, SENT, STIR, JPK_VAT, KSeF) on the supervision of person income tax

Autorzy:

Szymanek, Paweł

Powiązania:

https://bibliotekanauki.pl/articles/1787877.pdf

Data publikacji:

2021-08-23

Wydawca:

Instytut Studiów Podatkowych Modzelewski i wspólnicy

Tematy:

kasy rejestrujące online
STIR
SENT
JPK_VAT
KSeF
online cash registers

Opis:

Warunkiem wypełniania obowiązków podatkowych są sprawnie działające organy KAS. Celem zwiększenia skuteczności organów KAS wprowadzono szereg usprawnień takich jak: kasy rejestrujące online, system STIR i SENT oraz pliki JPK_VAT. Celem artykułu jest przeanalizowanie wpływu nowych narzędzi na nadzór nad podatkiem dochodowym od osób fizycznych. W artykule udowodniono tezę, zgodnie z którą obowiązek ewidencjonowania obrotu za pośrednictwem kas rejestrujących online, systemy STIR i SENT oraz obowiązek wysyłania plików JPK_VAT nie mają bezpośredniego wpływu na zwiększenie nadzoru nad wpłatami zaliczek i rocznego rozliczenia podatków dochodowych. Końcowo w artykule przeanalizowano skutki wprowadzenia systemu KSeF.
The condition for fulfilling tax obligations is efficiently operating KAS authorities. In order to increase the effectiveness of KAS bodies, a number of improvements were introduced, such as: online cash registers, the STIR and SENT system and JPK_VAT files. The aim of the article is to analyze the impact of new tools on the supervision of personal income tax. The article proves the thesis that the obligation to record turnover via online cash registers, STIR and SENT systems and the obligation to send JPK_VAT files do not have a direct impact on increasing supervision over advance payments and annual income tax settlements. Finally, the article analyzes the effects of introducing the KSeF system.

Źródło:

Doradztwo Podatkowe Biuletyn Instytutu Studiów Podatkowych; 2021, 8(300); 35-40
1427-2008
2449-7584

Pojawia się w:

Doradztwo Podatkowe Biuletyn Instytutu Studiów Podatkowych

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 48.

Tytuł:

Joint Formation and Mechanical Properties of 2060 Aluminum Alloy Refill Friction Stir Spot Welding Joint

Autorzy:

Shang, Zhen
Zuo, Yingying
Ji, Shude
Wang, Yue
Chai, Peng

Powiązania:

https://bibliotekanauki.pl/articles/2049424.pdf

Data publikacji:

2021

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

refill friction stir spot welding
2060 aluminum alloys
plunge depth
defect characteristics
mechanical properties

Opis:

Refill friction stir spot welding (RFSSW) was used to weld the 2060 aluminum alloy with 2 mm thickness. Joint formation, defect characteristics and mechanical properties were investigated. Results show that stir zone (SZ) is clarified into dynamic recrystallization zone (DRZ) and heat extruded zone (HEZ) due to different microstructural features. The size of void near the hook tip decreases with the increase of the plunge depth. Different hook morphologies are obtained under different plunge depths. The tensile-shear load of joint with the void defect initially decreases and then increases with increasing plunge depth. The mean loads of joints under different plunge depths are in the range of 5.1-5.8 kN. The void separates the hook from lap interface, so the cracks initiating from the hook propagate along the sleeve retreating path. The hook has a larger influence on the tensile-shear load of joint than void. All the tensile specimens present a shear-plug fracture mode.

Źródło:

Archives of Metallurgy and Materials; 2021, 66, 1; 153-161
1733-3490

Pojawia się w:

Archives of Metallurgy and Materials

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 49.

Tytuł:

Modeling and optimization of friction stir stitching of AISI 201 stainless steel via Box-Behnken design methodology

Autorzy:

Ojo, Olatunji Oladimeji
Obasha, Isaac Ojo

Powiązania:

https://bibliotekanauki.pl/articles/23966629.pdf

Data publikacji:

2022

Wydawca:

Stowarzyszenie Menedżerów Jakości i Produkcji

Tematy:

ścierny ścieg mieszany
projekt eksperymentalny
stal nierdzewna
modelowanie
optymalizacja
friction stir stitching
experimental design
stainless steel
modeling
optimization

Opis:

The paper investigates the modelling and optimization of the notch-repaired/friction stir stitched AISI 201 stainless steel welds via the use of a non-consumable tool-based repair process. The repair process employs a sequential hopping-stitching approach. This approach involves the application of two intercepted and completely overlapped plunging actions of a probe-less titanium carbide tool to create an effective refilling and repair of the notched zone. Box-Behnken design (BBD) was employed for the experimental planning, modelling, and optimization of the notch-repair process. Tool rotational speed, penetration depth and dwell time of the tool were the studied process parameters while tensile strength was the response variable. A quadratic model was identified as the best model for the notch-repaired welds based on the combination of a low sequential P-value of 0.008216, a high lack of fit P-value of 0.931366, and a close to unity adjusted and predicted R-square values. The process parameter and their interaction effects on the tensile strength of the repaired notch were identified via the ANOVA analysis. Plunge depth (main effect) and interaction effect of tool rotational speed and dwell time had significant influences on the notch-repair process and the resultant tensile strength of the AISI 201 stainless steel. The visual representations of these effects were shown through the 2D elliptical contour and 3D response surface plots. The optimized process parameters were identified as 1215.9795 rpm, 0.40262212 mm, and 5.98706376 s while the resultant notch-repaired joint yielded a tensile strength of 886 MPa, which is close to the predicted value.

Źródło:

Production Engineering Archives; 2022, 28, 2; 132--140
2353-5156
2353-7779

Pojawia się w:

Production Engineering Archives

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 50.

Tytuł:

Friction stir processing - analysis of the process
Tarciowa modyfikacja warstw wierzchnich z mieszaniem materiału - analiza procesu

Autorzy:

Węglowski, M. S.
Pietras, A.

Powiązania:

https://bibliotekanauki.pl/articles/351577.pdf

Data publikacji:

2011

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

proces tarciowej modyfikacji warstw wierzchnich z mieszaniem materiału
stopy aluminium
moment obrotowy wrzeciona
friction stir processing
aluminium alloy
spindle torque

Opis:

Results of friction stir processing (FSP) of aluminium alloy 6082 are presented in this paper. The FSP is an emerging metal working technology that can provide localized modification and control of microstructures in near surface layers of processed metallic components. This technology represents an adaptation of the principle of friction stir welding (FSW), a solid state joining process originally developed at the Welding Institute in the United Kingdom. Investigations were conducted on the welding machine, built on the base of the conventional, vertical milling machine equipped with LOWSTIR device - weld monitoring system plus software to display real time numerical values of forces and torque. The goal of the research was to determine the relationship between processing parameters and quality of the processed surface, forces and spindle torque acting on the tool. Results indicate that the quality of FSP zone is good in the limited range of processing parameters. The increase of the rotation speed of a tool causes the decrease in the spindle torque and increase in the heat generation.
W artykule przedstawiono wyniki badań procesu tarciowej modyfikacji warstw wierzchnich z mieszaniem materiału (ang. friction stir processing - FSP) stopu aluminium 6082. Technologia FSP jest rozwijającą się metodą pozwalającą na lokalne modyfikowanie i kontrolowanie mikrostruktury w warstwach wierzchnich obrabianych materiałów metalowych. Technologia ta opiera się na tych samych zasadach co technologia zgrzewania z mieszaniem materiału zgrzeiny (ang. Friction Stir Welding - FSW), która została opracowana w instytucie spawalnictwa w Wielkiej Brytanii (TWI). Badania zostały przeprowadzone na stanowisku do zgrzewania FSW zbudowanym na bazie konwencjonalnej frezarki wyposażonej w głowicę pomiarową LOWSTIR pozwalającą na pomiar sił i momentu działających na narzędzie w czasie rzeczywistym. Celem prowadzonych badań było poznanie zależności pomiędzy parametrami procesu a jakością modyfikowanych obszarów oraz sił i momentu działających na narzędzie. Wyniki badań wskazują, że w ograniczonym zakresie parametrów modyfikowania można uzyskać dobrą jakość obszarów zmodyfikowanych. Ponadto zauważono, że wzrost prędkości obrotowej narzędzia powoduje zmniejszenie momentu obrotowego oraz wzrost ilości generowanego ciepła.

Źródło:

Archives of Metallurgy and Materials; 2011, 56, 3; 779-788
1733-3490

Pojawia się w:

Archives of Metallurgy and Materials

Dostawca treści:

Biblioteka Nauki

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