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Tytuł:
Accounting of arc welding process specificity in innovative technologies
Uchet specifiki precessa dugovojj svarki v innovacionnykh tekhnologijakh
Autorzy:
Druz, O.
Gitnaya, S.
Powiązania:
https://bibliotekanauki.pl/articles/792163.pdf
Data publikacji:
2012
Wydawca:
Komisja Motoryzacji i Energetyki Rolnictwa
Tematy:
welding process
arc welding method
protective environment
economy
innovative technique
electron beam
plasma
financial viability
energy consumption
Źródło:
Teka Komisji Motoryzacji i Energetyki Rolnictwa; 2012, 12, 3
1641-7739
Pojawia się w:
Teka Komisji Motoryzacji i Energetyki Rolnictwa
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Advances and Perspectives in Using Medical Informatics for Steering Surgical Robots in Welding and Training of Welders Applying Long-Distance Communication Links
Postępy i perspektywy wykorzystania informatyki medycznej do sterowania robotami chirurgicznymi w spawaniu i szkoleniu spawaczy korzystających z połączeń komunikacji na duże odległości
Autorzy:
Prusak, Zbigniew
Tadeusiewicz, Ryszard
Jastrzębski, Ryszard
Jastrzębska, Ilona
Powiązania:
https://bibliotekanauki.pl/articles/115145.pdf
Data publikacji:
2020
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
spawanie zdalne
sztuczna inteligencja
rzeczywistość rozszerzona
maska spawalnicza
jeziorko spawalnicze
UHTC
plazma łukowa
remote welding
artificial intelligence
augmented reality
welding mask
weld pool
arc plasma
Opis:
This paper discusses various challenges in remote welding with a surgical robot equipped with a digital camera used to observe the welding zone, in particular the difficulty in detecting the boundaries of the weld pool. The difference in the processing of the real image by the human brain is discussed in comparison with the image in the form of a film from a digital camera. In addition to the need of performing the second derivative of the image in real-time, three models of human recognition of an image were discussed, one of which was already studied by researchers from Cambridge, UK. The concept of melting the base material by bending the weld pool with the pressure of non-ionized arc gases and the American implementation of the measurement of the third dimension of the weld pool and determining the weld penetration by electronics of the welding machine are discussed. Desired movement trajectories of the electrode tip based on the physics of the welding arc and welding technology are presented along with difficulties in teaching the movements to welding trainees. Basics of the neural model of the brain with the vector model of artificial intelligence are also presented.
W artykule omówiono różne wyzwania związane ze spawaniem zdalnym za pomocą robota chirurgicznego wyposażonego w kamerę cyfrową do obserwacji strefy spawania, w szczególności dyskutowano trudność w wykrywaniu granic jeziorka spawalniczego. Omówiono różnicę w przetwarzaniu obrazu rzeczywistego przez ludzki mózg w porównaniu z obrazem w postaci filmu z aparatu cyfrowego. Oprócz potrzeby wykonania drugiej pochodnej obrazu w czasie rzeczywistym, omówiono trzy modele rozpoznawania obrazu przez człowieka, z których jeden był już badany przez naukowców z Cambridge w Wielkiej Brytanii. Omówiono koncepcję topienia materiału podstawowego przez zaginanie jeziorka spawalniczego ciśnieniem niejonizowanych gazów łukowych oraz amerykańską implementację pomiaru trzeciego wymiaru jeziorka spawalniczego i określania wtopienia stymulowanego przez elektronikę spawarki. Przedstawiono pożądane trajektorie ruchu końcówki elektrody w oparciu o fizykę łuku spawalniczego i technologię spawania oraz trudności w uczeniu ruchów praktykantów. Przedstawiono również podstawy neuronowego modelu mózgu wraz z modelem wektorowym sztucznej inteligencji.
Źródło:
Welding Technology Review; 2020, 92, 5; 37-49
0033-2364
2449-7959
Pojawia się w:
Welding Technology Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An apparatus for sequential pulsed plasma beam treatment in combination with Arc PVD deposition
Autorzy:
Stanisławski, J.
Piekoszewski, J.
Richter, E.
Werner, Z.
Powiązania:
https://bibliotekanauki.pl/articles/147034.pdf
Data publikacji:
2002
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
Arc-PVD
interlayer
pulse plasma treatment
Opis:
A hybrid type of apparatus is described which enables one to form a thin multi-layer film on the surface of any kind of solid substrate. In one process, the surface is treated with a high intensity pulse plasma beam which introduces the chosen kind of atoms into the near-surface layer of the substrate. In the second process, following the first without breaking the vacuum, the coating is formed by arc PVD (physical vapour deposition) process. Two examples of coatings formed on metallic and ceramic substrates are presented.
Źródło:
Nukleonika; 2002, 47, 3; 119-122
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Carbon nanostructure growth: new application of magnetron discharge
Autorzy:
Breus, A.
Abashin, S.
Serdiuk, O.
Powiązania:
https://bibliotekanauki.pl/articles/2055755.pdf
Data publikacji:
2021
Wydawca:
Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
Tematy:
nanotechnology
plasma synthesis
carbon nanostructures
magnetron discharge
arc spots
nanotechnologia
synteza plazmowa
nanostruktury węglowe
rozpylanie magnetronowe
wyładowania
Opis:
Purpose: The application of a common magnetron discharge to the growth of carbon nanostructures is studied. The simplicity of the proposed technique can be beneficial for the development of new plasma reactors for large-scale production of carbon nanostructures. Design/methodology/approach: Graphite cathode was treated by carbon-containing powder accelerated by use of nozzle, and then aged in hydrogen. Superposition of glow and arc discharges was obtained, when putting the cathode under the negative biasing with respect to the walls of a vacuum chamber. The pulsed discharge was preserved through the whole time of treatment. This process was explained in terms of interaction of glow discharge plasma with a surface of the cathode made of non-melting material. Findings: The plasma treatment resulted in generation of the diverse nanostructures confirmed by SEM and TEM images. Spruce-like nanostructures and nanofibers are observed near the cathode edge where the plasma was less dense; a grass-like structure was grown in the area of “race-track”; net-like nanostructures are found among the nanofibers. These findings allow concluding about the possible implementation of the proposed method in industry. Research limitations/implications: The main limitation is conditioned by an explosive nature of nanostructure generation in arcs; thus, more elaborate design of the setup should be developed in order to collect the nanospecies in the following study. Practical implications: High-productivity plasma process of nanosynthesis was confirmed in this research. It can be used for possible manufacturing of field emitters, gas sensors, and supercapacitors. Originality/value: Synthesis of carbon nanostructures is conducted by use of a simple and well-known technique of magnetron sputtering deposition where a preliminary surface treatment is added to expand the production yield and diversity of the obtained nanostructures.
Źródło:
Journal of Achievements in Materials and Manufacturing Engineering; 2021, 109, 1; 17--25
1734-8412
Pojawia się w:
Journal of Achievements in Materials and Manufacturing Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Charakterystyki łuku plazmotronów spektrometrycznych
Arc dependencies of the spectrometric plasma torch
Autorzy:
Sawicki, A.
Kruczinin, A.M.
Powiązania:
https://bibliotekanauki.pl/articles/320215.pdf
Data publikacji:
2005
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
łuk elektryczny
model dwuwarstwowy łuku
plazmotron spektrometryczny
electrical arc
two-layer arc model
spectrometric plasma generator
Opis:
W artykule sformułowano warunki brzegowe modelu łuku w plazmotronie spektrometrycznym bez wymuszonego przepływu gazu. Podano sposób przeliczania charakterystyk eksperymentalnych na warunki pracy plazmotronu z różnymi gazami plazmotwórczymi. Przedstawiono obliczone charakterystyki elektryczne i cieplne części cylindrycznej i stożkowej łuku ściśniętego zimnymi ściankami.
Boundary conditions of the arc model in a spectrometric plasma torch without excited gas flow have been formulated in the paper. The method of calculation of experimental dependencies for plasma torch working on different plasmagenic gases has been presented in the paper. Calculated electrical and thermal dependencies of cylindrical and conical part of the constricted arc with cold wall have been shown.
Źródło:
Elektrotechnika i Elektronika; 2005, 24, 1; 75-84
1640-7202
Pojawia się w:
Elektrotechnika i Elektronika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Concept of an innovative technological line for the processing of linear profiles
Autorzy:
Gustowski, Tomasz
Kurek, Waldemar
Grzejda, Rafał
Powiązania:
https://bibliotekanauki.pl/articles/26081758.pdf
Data publikacji:
2023
Wydawca:
Stowarzyszenie Menedżerów Jakości i Produkcji
Tematy:
profile liniowe
zautomatyzowana linia technologiczna
cięcie łukiem plazmowym
cięcie piłą tarczową
robot spawalniczy
linear profiles
plasma arc cutting
circular saw cutting
welding robot
automated technological line
Opis:
The paper presents the concept of an innovative technological line intended for the processing of long linear profiles used in engineering steel and aluminium structures, which can be both hollow and open section profiles. The line is set up with seven main sections: profile loading system, input roller conveyor, plasma arc cutting section, circular saw cutting section, robot welding section, output roller conveyor and profile packaging system. The assumptions adopted to create the concept of the techno-logical line were specified. A block diagram of the line and drawings showing the structure of its selected elements were depicted. The features of the technological line documenting its product and process innovativeness were indicated. The proposed technological line is built in the AGICO Group company, but it can also be successfully implemented in other companies dealing with the processing of long linear profiles.
Źródło:
Production Engineering Archives; 2023, 29, 1; 7--13
2353-5156
2353-7779
Pojawia się w:
Production Engineering Archives
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Development and SEM/EDS characterisation of porous coatings enriched in magnesium and copper obtained on titanium by PEO with ramp voltage
Autorzy:
Rokosz, Krzysztof
Hryniewicz, Tadeusz
Pietrzak, Kornel
Dudek, Łukasz
Powiązania:
https://bibliotekanauki.pl/articles/1179226.pdf
Data publikacji:
2017
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
CP Titanium Grade 2
Micro Arc Oxidation (MAO)
Plasma Electrolytic Oxidation (PEO)
calcium nitrate Mg(NO3)2∙6H2O
linear polarization
ramp voltage
zinc nitrate Ca(NO3)2∙3H2O
Opis:
In the present paper, the SEM and EDS results of porous and enriched in calcium and/or zinc coatings, which were obtained during 3-minute treatments by Plasma Electrolytic Oxidation/ Micro Arc Oxidation processes on CP Titanium Grade 2 at ramp potentials (liner polarization) from 0 up to 650 VDC in electrolytes containing 500 g Mg(NO3)2∙6H2O and/or 500 g Cu(NO3)2∙3H2O in 1 L H3PO4, are reported. It was found that the obtained coatings, dependent on the PEO process conditions, have pores with different shapes and diameters. The Mg/P and Cu/P ratios by atomic concentration are the same and equal to 0.09±0.01 (by wt %) | 0.11±0.01 (by at%) and/or 0.40±0.08 (by wt %) | 0.19±0.04 (by at%), respectively. That may testify the hydroxyapatite-like structures of Mg-Ti-PO43– and/or Cu-Ti-PO43– have been identified to occur.
Źródło:
World Scientific News; 2017, 80; 29-42
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of unconventional methods of cutting on microstructure, topography and microhardness changes in steel
Wpływ niekonwencjonalnych metod cięcia na zmiany mikrostruktury i właściwości stali węglowej
Autorzy:
Leszczyńska-Madej, B.
Richert, M.
Sak, T.
Powiązania:
https://bibliotekanauki.pl/articles/263864.pdf
Data publikacji:
2012
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
plasma arc cutting
laser cuting
structure changes
microhardness changes
head affected zone
cięcie łukiem plazmowym
cięcie laserowe
zmiany struktury
mikrotwardość
strefa wpływu ciepła
Opis:
The carbon steel for ąuenching and tempering has been cut with two different techniques, plasma arc and laser. The influence of these two unconventional methods of cutting on the changes of microstructure and properties has been studied in this paper. The structure changes after cutting were investigated by means of both light and scanning electron microscopy, additionally microhardness in the heat affected zone was measured. The performed investigations show that both methods of cutting have a strong influence on the structure and properties of investigated steels. Characteristic structure of cut area was a bainitic structure. The amount of bainite structure decreased with increased distance from the edge of the cutting sample. The plasma arc cutting influences the structure changes morę than laser beam. The bainitic structure after this method of cutting was observed to a depth of near 130 micrometers (laser), whereas after plasma arc - average 400 micrometers. Measured microhardness at the edge after cutting by both methods was about 28OHvO.l what makes up 130% increase comparing to materiał beyond the heat affected zone.
Stal węglową do ulepszania cieplnego wycięto dwiema metodami: lukiem plazmowym i laserem. W artykule przedstawiono porównawcze wyniki badania mikrostruktury i mikrotwardości w strefie wpływu ciepła po cięciu stali tymi dwiema metodami. Cechą charakterystyczną było wystąpienie struktury bainitycznej w strefie wpływu cięcia. W przypadku cięcia laserem struktura bainitu obserwowana była do głębokości około 130 (Jm, z kolei po cięciu łukiem plazmowym strefa wpływu sięgała aż do głębokości 400 nm. Zmierzona mikrotwardość przy krawędzi po cięciu zarówno łukiem plazmowym, jak i laserem wynosiła około 280 Hv0,l, co w porównaniu z materiałem poza strefą wpływu stanowi wzrost o ponad 130%.
Źródło:
Metallurgy and Foundry Engineering; 2012, 38, 2; 109-115
1230-2325
2300-8377
Pojawia się w:
Metallurgy and Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Experimental study of mild steel cutting process by using the plasma arc method
Autorzy:
Magid, H.M.
Powiązania:
https://bibliotekanauki.pl/articles/2055758.pdf
Data publikacji:
2021
Wydawca:
Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
Tematy:
cutting power
edge roughness
mild steel
plasma arc cutting
scanning speed
moc skrawania
chropowatość
stal miękka
cięcie plazmowe
prędkość skanowania
Opis:
Purpose: In this study, plasma arc cutting (PAC) is an industrial process widely used for cutting various away types of metals in several operating conditions. Design/methodology/approach: It is carried out a systematic or an authoritative inquiry to discover and examine the fact, the plasma cutting process is to establish the accuracy and the quality of the cut in this current paper assessed a good away to better the cutting process. Findings: It found that the effect of parameters on the cutting quality than on the results performed to accomplish by statistical analysis. Research limitations/implications: The objective of the present work paper is to achieve cutting parameters, thus the quality of the cutting process depends upon the plasma gas pressure, scanning speed, cutting power, and cutting height. Practical implications: The product of the plasma cutting process experimentally has been the quality of the cutting equipment that was installed to monitor kerf width quality by exam the edge roughness, kerf width, and the size of the heat-affected zone (HAZ). Originality/value: The results reveal that were technically possessed of including all the relevant characteristics, then a quality control for the cutting and describe the consequence of the process parameters.
Źródło:
Journal of Achievements in Materials and Manufacturing Engineering; 2021, 108, 2; 75--85
1734-8412
Pojawia się w:
Journal of Achievements in Materials and Manufacturing Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Fabrication and characterisation of porous coatings obtained by plasma electrolytic oxidation
Autorzy:
Rokosz, K.
Hryniewicz, T.
Raaen, S.
Malorny, W.
Powiązania:
https://bibliotekanauki.pl/articles/95249.pdf
Data publikacji:
2017
Wydawca:
Politechnika Koszalińska. Wydawnictwo Uczelniane
Tematy:
Plasma Electrolytic Oxidation
PEO
micro arc oxidation
MAO
CP Titanium Grade 2
niobium
Ti2448
Ti6Al4V
TNZ
plazmowe utlenianie elektrolityczne
utlenianie mikro-łukowe
tytan
stopy tytanu
niob
Opis:
In the paper, characteristics of porous coatings enriched in copper on pure Titanium and its alloys (NiTi, Ti6Al4V, TNZ, Ti2448) as well as on niobium obtained by Plasma Electrolytic Oxidation (PEO) in electrolyte containing H3PO4 within Cu(NO3)2, are presented. All obtained surfaces of PEO coatings have different shapes and diameters of pores. The binding energies of main peaks for titanium Ti2p3/2, niobium Nb3d5/2, zirconium Zr3d5/2, phosphorus (P2p) and oxygen (O1s) suggest the presence of titanium Ti4+, niobium Nb5+ and zirconium Zrx+ (x≤2) as well as PO4 3–.
Źródło:
Journal of Mechanical and Energy Engineering; 2017, 1, 1; 23-30
2544-0780
2544-1671
Pojawia się w:
Journal of Mechanical and Energy Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
HSS deposition by PTA – feasibility and properties
Autorzy:
Rohan, P.
Kramár, T.
Petr, J.
Powiązania:
https://bibliotekanauki.pl/articles/102209.pdf
Data publikacji:
2016
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
high-speed steel
plasma transfer arc cladding
pulsed PTA
multilayer thick coatings
hardness
Opis:
High speed steels (HSS) as iron alloys reinforced by carbides of tungsten, chromium, vanadium and/or cobalt are known for more than 100 years. HSS is commonly used for cutting tools fabrication because of their high hardness, ductility, and strength and temperature resistance. Recently many different kinds of thin layers are often deposited on HSS tools in order to increase their lifetime. HSS are produced by conventional metallurgical methods and the tools are hardened by quenching and tempering. Recently, large part of HSS tools are produced by powder metallurgy (i.e. HIP-hot isostatic pressing). There are also some studies about thermal spraying of HSS but there is no evidence about Plasma Transfer Arc cladding of HSS. Two powders of HSS 23, resp. HSS30 grade were selected and deposited by Plasma Transfer Arc (PTA) and pulsed PTA on to mild steel substrate. In order to find the ability of thick layer forming, four layers cladding were used. To minimize heat input the influence of 76 Hz pulsation was also studied. Vickers hardness was measured on cross section and metallography of coatings was done. It was found that with selected parameters thick layer of HSS can be deposited. Pulsation increases the hardness of coatings in comparison with layers produced by direct current PTA. PTA and pulsed PTA methods of HSS parts fabrication can be used for both manufacturing and reparation of cutting tools and also for 3D additive manufacturing process.
Źródło:
Advances in Science and Technology. Research Journal; 2016, 10, 29; 57-61
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influences on plasma cutting quality on CNC machine
Autorzy:
Kudrna, Lukas
Fries, Jiri
Merta, Marek
Powiązania:
https://bibliotekanauki.pl/articles/2064923.pdf
Data publikacji:
2019
Wydawca:
STE GROUP
Tematy:
torch
plasma arc
cutting parameters
Opis:
This article discusses plasma cutting technology and its influences on the quality of the resulting cut. Plasma or a plasma arch consists of positive and negatively charged particles, excited and neutral atoms and molecules. As it contains free particles, it is electrically conductive and thus subject to the effects of the electrical and magnetic field. The basis of CNC machine design is described in the article, which has at least 3 axes (x, y, z), but there are also more technologically demanding applications, such as pipe cutting, profile and cutting using chamfer to prepare surfaces for welding, where these multi-axis devices are frequently used. The principle of plasma cutting and the plasma cutting phase is described in this article. The materials that can be divided by a plasma arc are described in detail, including graphs displaying the dependence of sheet thickness on the cutting speed. The article describes and lists the gases that are used in plasma-arc cutting, such as oxygen, argon, hydrogen and nitrogen. Important components of plasma cutting technology are the parameters that can be adjusted and set before the cutting so that the cut is of good quality. The most comprehensive chapter deals with the influences that affect plasma cutting quality. Cutting quality can be influenced by a number of factors. Everything starts with the proper choice of a CNC machine and a plasma source. The quality also depends on the expertise and experience of the machine operator and the setting of the plasma cutting parameters. This issue of influences on the plasma cutting quality is based on long-term experience in the field of the thermal cutting process.
Źródło:
Multidisciplinary Aspects of Production Engineering; 2019, 2, 1; 108--117
2545-2827
Pojawia się w:
Multidisciplinary Aspects of Production Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Microstructural characteristic of N2 shielding gas in coating FeCrC composite to the surface of AISI 1030 steel with PTA method
Wpływ zawartości azotu w gazie osłonowym na mikrostrukturę powłok FeCrC na stali AISI 1030 otrzymanych metodą napylania plazmowego
Autorzy:
Yildiz, T.
Kaya Gür, A.
Powiązania:
https://bibliotekanauki.pl/articles/351583.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
napylanie plazmowe
modyfikacja powierzchni
węglik chromu
mikrostruktura
plasma transferred arc coating
surface modifications
chromium carbide
chromium nitrurs
microstructure
Opis:
In this study, FeCrC powder was alloyed on the surface of AISI 1030 steel with FeCrC powder having 70% Cr ratio with the Plasma Transferred Arc Welding Method. In the coating process performed with the Plasma Transferred Arc Welding Method, N2 gas at 1-3-5% ratio was added to the shielding gas. The coating layer was analysed using optical microscope (OM), scanning electron microscope (SEM), X-ray diffractogram (XRD) and X-ray energy dispersive spectrometer (EDS). As a result of optical microscope and microstructure analyses, it was determined that the coating layer and the sub-layer were connected to each other metallurgical and there were austenite ( γ), Fe-Cr, Fe23(C)6, and Cr7C3 phase and carbides and CrN in the structure.
W pracy badano nakładanie powłok z proszku FeCrC o zawartości 70% chromu na powierzchni stali AISI 1030 metodą PTA. W czasie nakładania powłoki zawartość azotu w gazie ochronnym wynosiła 1, 3, 5%. Uzyskane powłoki badane były za pomocą mikroskopii optycznej, skaningowej mikroskopii elektronowej, dyfrakcji rentgenowskiej i mikroanalizy rentgenowskiej. W oparciu o wyniki obserwacji i analiz mikrostruktury stwierdzono, że powłoka i warstwa pośrednia połączone są ze sobą metalurgicznie. Stwierdzono obecność austenitu, Fe-Cr, Fe23(C)6, Cr7C3 oraz węglików i CrN w mikrostrukturze.
Źródło:
Archives of Metallurgy and Materials; 2011, 56, 3; 723-729
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Microstructure and microhardness of Ti6Al4V alloy treated by GTAW SiC alloying
Autorzy:
Bochnowski, W.
Powiązania:
https://bibliotekanauki.pl/articles/382933.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
stop tytanu
obróbka plazmowa
stopowanie
mikrotwardość
titanium alloy
arc plasma treatment
alloying
structure
fracture
microhardness
Opis:
In this work, the change of the structure and microhardness of Ti6Al4V titanium alloy after remelting and remelting with SiC alloing by electric arc welding (GTAW method) was studied. The current intensity equal 100 A and fixed scan speed rate equal 0,2 m/min has been used to remelting surface of the alloy. Change of structure were investigated by optical and scanning electron microscopy. Microhardness test showed, that the remelting of the surface does not change the hardness of the alloy. Treated by GTAW SiC alloying leads to the formation of hard (570 HV0,1) surface layer with a thickness of 2 mm. The resulting surface layer is characterized by diverse morphology alloyed zone. The fracture of alloy after conventional heat treatment, similarly to fracture after remelting with GTAW is characterized by extremely fine dimples of plastic deformation. In the alloyed specimens the intergranular and crystalline fracture was identified.
Źródło:
Archives of Foundry Engineering; 2012, 12, 2; 261-266
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Non - homogeneities in multi - element plasmas
Autorzy:
Pawelec, E.
Powiązania:
https://bibliotekanauki.pl/articles/146398.pdf
Data publikacji:
2012
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
plasma spectroscopy
wall-stabilized arc
demixing in plasma
plasma modeling
Opis:
This work presents the results of modeling and measurements of plasma parameters performed in a wall -stabilized arc working in a mixture of gases. The temperature and composition of the plasma are analyzed and the homogeneity of the plasma along the arc column in different gas mixtures is studied.
Źródło:
Nukleonika; 2012, 57, 2; 257-263
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł

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