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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
Artykuł
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
Artykuł
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
Artykuł
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
Artykuł
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
Artykuł
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
Artykuł
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
Artykuł
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
Artykuł
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
Artykuł
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
Artykuł
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
Artykuł
Tytuł:
Effect of FSW welding parameters on the tensile strength of aluminum alloys
Autorzy:
Serier, Mohamed
Berrahou, Mohamed
Tabti, Affaf
Bendaoudi, Seif-E
Powiązania:
https://bibliotekanauki.pl/articles/94104.pdf
Data publikacji:
2019
Wydawca:
Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
Tematy:
tensile strength
friction stir welding
aluminum alloy
ANOVA
Opis:
The friction stir welding process is an innovative technique for joining metals using plasticity, without presenting the fusion. It was first applied to aluminum alloys, for example copper, steel alloys, polymers and others. In this work the effects of the rotational speed, the speed of travel and the axial force of the tool were grouped in a mathematical model to quantify their influences on the weld seam. In this context and with of the experimental tests, the desired objective through this study is to describe the tensile strength of the cord resulting from this welding operation, for the qualification of this type of parts with an optimum adapted to a given application.
Źródło:
Archives of Mechanical Technology and Materials; 2019, 39; 41-45
2450-9469
Pojawia się w:
Archives of Mechanical Technology and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
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
Artykuł
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
Artykuł
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
Artykuł
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
Artykuł
Tytuł:
The influence of joining method of AW-7020 aluminium alloy on corrosion properties
Autorzy:
Dudzik, K.
Powiązania:
https://bibliotekanauki.pl/articles/247476.pdf
Data publikacji:
2011
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
aluminium alloys
friction stir welding (FSW)
MIG welding
corrosion
Opis:
The results of corrosion properties research of aluminum alloy AW 7020 (AlZn5Mg1) welded by friction stir welding FSW and MIG were presented. Friction Stir Welding (FSW) - a new technology can be successfully used for butt welding of different types of aluminum alloy sheets. In the article the parameters for friction stir welding of sheets made of AlZn5Mg1 [7020] alloy was presented as well as parameters for MIG. Metallographic analysis of bonds showed a proper structural construction of both, the FSW and MIG welded 7020 aluminum alloys. The polarization was carried out at changes in the potential speed of 12 mV/min in the range of š 50 mV with the stationary potential. Atlas 0531EU & IA potentiostat was used for studies. The corrosion resistance research was carried out using three electrode potentiodynamic method. The following parameters were measured: electrode potential Ec [mV] and the corrosion current density Jc [mi A/cm2]. The tests were carried out on specimens in 3.5% water solution NaCl. Good resistance to electrochemical corrosion was found of the native material, friction stir welded and MIG welded 7020 aluminum alloys. Original value are received results of the corrosion properties of new method friction stir welded AlZn5Mg1 alloy compared with traditional MIG method and the native material.
Źródło:
Journal of KONES; 2011, 18, 4; 587-581
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
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
Artykuł
Tytuł:
Effect of Tool Pin Profile on Friction Stir Welding of Dissimilar Materials AA5083 and AA7075 Aluminium Alloy
Autorzy:
Azmi, Muhammad Haziq
Hasnol, Muhammed Zakariya
Zaharuddin, Mohd Faridh Ahmad
Sharif, Safian
Rhee, Sehun
Powiązania:
https://bibliotekanauki.pl/articles/2106579.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
friction stir welding
aluminium alloys
tool pin
mechanical properties
Opis:
Friction stir welding (FSW) currently contributes a significant joining process for welding aluminium, magnesium, and other metals in which no molten or liquid state were involved. It is well known that aluminium alloys are more effective, promising for different applications light weight, strength and low cost. This study aims to determine how such tools geometry and tool speed can be related to dissimilar material in the joining process. Specifically, it investigates whether the distribution of the weld zone particularly between tool pin profile to rotational speed. In this context, the influence of tool pin profile and tool rotational speed in relation to the mechanical properties and microstructure of friction stir welded. The aim of this study is also to test the hypothesis that better mixing between dissimilar metals at higher tool rotational speed along the weld path. Three different tool profiles were configured with AA5083 and AA7075. During welding, notable presence of various types of defects such as voids and wormholes in the weld region. The results of this work showed that the tool pin profile and weld parameter are significant in determining mechanical properties at different tool rotational speed. The highest tensile strength achieved was about 263 MPa and the defectfree joint was obtained by using the threaded tapered cylindrical pin tool at a rotational speed of 800 rpm. These findings indicate that different tool profiles influence differently on the formation of defects at welds. On this basis, the tool geometry should be considered when designing experimental friction stir welded joint.
Źródło:
Archives of Metallurgy and Materials; 2022, 67, 2; 465--470
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
What if they are not weld-able?
Autorzy:
Zhang, H.
Jayatissa, A. H.
Durbin, S.
Ma, G.
Powiązania:
https://bibliotekanauki.pl/articles/407437.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
hybrid mechanical joining
friction stir welding
riveting
magnesium
aluminum
Opis:
Many light metals, such as aluminum and magnesium alloys, are promised to provide significant weight reduction for automobiles. However, the difficulties in welding these metals seriously hinder their large-scale applications. A new, hybrid mechanical joining process is proposed to avoid the inherited metallurgical complications in welding. By spinning and pressing a solid rivet into the metals, a joint is formed with the locking from the rivet, a stirred/mixed zone around the rivet, and solid bonding at the faying interface. This riveting process combines the actions of friction-stir welding in which metals of difierent sheets are mechanically mixed, and self-piercing riveting process which embeds a rivet in the sheets. Experiments have shown that such a friction-stir riveting process can produce joints of comparable strength to those created by other joining means, and can be applied to dififcult-to-weld metals and dissimilar metals, such as aluminum-to-aluminum, magnesium-to-magnesium, and aluminum-to-magnesium.
Źródło:
Management and Production Engineering Review; 2012, 3, 3; 86-91
2080-8208
2082-1344
Pojawia się w:
Management and Production Engineering Review
Dostawca treści:
Biblioteka Nauki
Artykuł
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
Artykuł
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
Artykuł
Tytuł:
Fabrication of Aluminum - Cr3C2 Surface Composites through Friction Stir Processing and Analyzing its Microstructural and Mechanical Evolution
Autorzy:
Satheeshkumar, J.
Jayaraman, M.
Priyadharshini, G. S.
Sathya Mukesh, C. S.
Powiązania:
https://bibliotekanauki.pl/articles/352635.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
microstructure
microhardness
friction stir processing
ADC-12
chromium carbide
Opis:
In this paper, aluminium alloy of grade ADC-12 was considered as a base metal and chromium carbide (Cr3C2) particles were reinforced through friction stir process. A detailed analysis of mechanical property and metallurgical characterization studies were performed to evaluate the surface composite. Remarkable changes were observed in the developed composite due to the mechanical force produced by the stir tool with an increase in hardness. The metallurgical investigation infers that the presence of silica in ADC-12 alloys has undergone mechanical fracture and long needle structure changed to reduced size. On the other hand, at higher tool rotational speed, the uniform distribution of hard particles was confirmed through SEM micrographs. Thus the modified surface composite has produced good mechanical property with high metallurgical qualities.
Źródło:
Archives of Metallurgy and Materials; 2019, 64, 4; 1527-1532
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A Study on the Influence of Reinforcement Volume on AA5083/(SiC-Gr) Hybrid Surface Composite Developed by Friction Stir Processing
Autorzy:
Bharti, Shalok
Ghetiya, Nilesh D.
Patel, Kaushik M.
Saxena, Kuldeep K.
Powiązania:
https://bibliotekanauki.pl/articles/27765096.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
surface composites
multi-pass
Friction Stir Processing
reinforcement
hybrid composite
Opis:
In this study, a hybrid surface composite of AA5083/SiC-Gr was produced by Friction Stir Processing (FSP). Reinforcement material each in 50:50 proportion was filled in the base matrix using holes method. Three different hybrid reinforcement volumes of 301.6 mm3, 452.4 mm3, and 603.2 mm3 were prepared for surface composite. Optical and Scanning Electron Microscopy was used to check the quality of the prepared surface composite and homogeneous distribution of reinforcement was observed in the images. It was observed that due to better uniform distribution of reinforcement particles during 3 pass FSP, specimens with 301.6 mm3 reinforcement volume showed enhanced microhardness and wear properties in comparison with the other specimens.
Źródło:
Archives of Metallurgy and Materials; 2023, 68, 2; 625--629
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of joining method for hardness distribution in joints of AlZnSMg1 alloy
Autorzy:
Dudzik, K.
Powiązania:
https://bibliotekanauki.pl/articles/247544.pdf
Data publikacji:
2010
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
friction stir welding (FSW)
welding MIG
aluminium alloys
hardness distribution
Opis:
The article presents the research results of hardness values distribution of friction s tir welded joint (FSW) alloy AW 7020 (AlZn5Mg1). The joints welded by traditional MIG method of the same aluminium alloy were chosen as reference points. Friction stir welding (FSW) - a new technology can be successfully used for butt welding of sheet metal with different types of aluminium alloys. The parameters of friction stir welding (FSW) and MIG welding used to join metal alloy AlZn5Mg1 (7020) were presented. Metallographic analysis showed the correct structured both MIG welded joints and FSW welded aluminum alloy 7020. The study was carried out using Vickers hardness HV5 accordance with the requirements of the Polish Standard PN-EN 1043-1:2000. The study was conducted in three rows, and the indenter load was 50 N. In order to determine the structural changes in the bonded joints, the samples were polished and then micro-etched KELLER reagent. Metallographic examination was carried out using optical microscope Axiovert ZAISS 25. Metallographic examination revealed the existence of an explicit heat affected zone of HAZ in case of MIG welded joints and virtually lack there of, in case of FSW welded joints. In case of FSW welded joint, maximum hardness was observed in the middle of joint, but at a distance of approximately 25 mm from the middle of the weld there is a hardness decrease of about 10% relative to the base material. In the MIG weldedjoint lowest hardness of the weld occurred in the middle of the joint.
Źródło:
Journal of KONES; 2010, 17, 4; 137-141
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł

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