scholarly journals TECHNOLOGINIŲ PARAMETRŲ ĮTAKOS VIRINTINĖS JUNGTIES SAVYBĖMS TYRIMAI, SUVIRINANT AISI 304 PLIENĄ / RESEARCH OF THE TECHNOLOGICAL PARAMETERS INFLUENCE ON THE WELD PROPERTIES OF WELDED STEEL AISI 304

2019 ◽  
Vol 11 (0) ◽  
pp. 1-4
Author(s):  
Mantvydas Sereika ◽  
Valentinas Varnauskas ◽  
Irmantas Gedzevičius
Keyword(s):  
Finite Element ◽  
Welded Joints ◽  
Visual Inspection ◽  
Hardness Testing ◽  
Technological Parameters ◽  
Welded Steel ◽  
Aisi 304 ◽  
Aisi 304 Steel ◽  
Weld Properties ◽  
Steel Aisi

The article analyzes the influence of technological parameters on the properties of welded joints by welding AISI 304 steel. In order to get the results was carried out computer modeling with the finite element modeling program ANSYS, welded samples performed visual inspection, hardness testing to make a seam. Results of the study are presented in tabular and graphic representation, the conclusions.

scholarly journals Effect of Periodic Water Clusters on AISI 304 Welded Surfaces

Materials ◽  
2021 ◽  
Vol 14 (1) ◽  
pp. 210
Author(s):  
Madhulika Srivastava ◽  
Akash Nag ◽  
Lucie Krejčí ◽  
Jana Petrů ◽  
Somnath Chattopadhyaya ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Residual Stress ◽  
Welded Joints ◽  
Water Clusters ◽  
Water Pressure ◽  
Water Jet ◽  
Technological Parameters ◽  
Maximum Enhancement ◽  
Aisi 304 ◽  
Pulsating Water Jet

This study compared the effect of the interaction time of periodic water clusters on the surface integrity of AISI 304 tungsten inert gas (TIG) welded joints at different excitation frequencies, as the effect of the technological parameters of pulsating water jet (PWJ) on the mechanical properties of TIG welded joints are under-researched. The TIG welded joints were subjected to different frequencies (20 and 40 kHz) and traverse speeds (1–4 mm/s) at a water pressure of 40 MPa and a standoff distance of 70 mm. The effect of the interaction of the pulsating jet on the material and the enhancement in its mechanical properties were compared through residual stress measurements, surface roughness, and sub-surface microhardness. A maximum enhancement in the residual stress values of up to 480 MPa was observed in the heat-affected zone, along with a maximum roughness of 6.03 µm and a maximum hardness of 551 HV using a frequency of 40 kHz. The improvement in the surface characteristics of the welded joints shows the potential of utilizing pulsed water jet technology with an appropriate selection of process parameters in the treatment of welded structures.

scholarly journals Effect of Disk Laser Beam Offset on the Microstructure and Mechanical Properties of Copper—AISI 304 Stainless Steel Dissimilar Metals Joints

Metals ◽  
2020 ◽  
Vol 10 (10) ◽  
pp. 1294 ◽  
Author(s):  
Miroslav Sahul ◽  
Ema Tomčíková ◽  
Martin Sahul ◽  
Matej Pašák ◽  
Barbora Ludrovcová ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Stainless Steel ◽  
Laser Beam ◽  
Weld Metal ◽  
Welded Joints ◽  
304 Stainless Steel ◽  
Aisi 304 Stainless Steel ◽  
Copper Sheet ◽  
Aisi 304 ◽  
Aisi 304 Steel

Deoxidized oxygen free copper C12200, 1 mm in thickness, was welded to 1-mm thick AISI 304 stainless steel with disk laser. The butt-welded joints were produced with different welding parameters. Full factorial design of experiment (DoE) approach consisting of three factors and two levels was utilized. Laser powers used for welding were 1.3 and 1.9 kW and welding speeds of 20 and 30 mm/s. Two beam offsets were tested, namely, 100 μm toward copper side and 200 μm toward AISI 304 steel. It was found that beam offset possesses the largest influence on the welded joints’ tensile strength. Tensile strengths attained values more than 3.7 times higher in comparison to the AISI 304 steel beam offset. When lower laser power was used, the higher tensile strength was attained for copper sheet offset. Higher microhardness was observed when laser beam was offset to AISI 304 steel side. The average microhardness of the weld metal was higher than that of the weaker base material, copper sheet. Energy dispersive X-ray spectroscopy (EDS) analysis confirmed the heterogeneity in elemental composition across the welded joint interface, being lower when laser beam was offset to AISI 304 steel side. On the other hand, the copper content dropped to the average composition of weld metal at the distance of about 140 μm from copper-weld metal interface.

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