Numerical analysis and microstructure analysis and mechanical properties of non-homogeneous laser welding process for 304L stainless steel and St37 low carbon steel by the design of experiments method

Articles in Press

Document Type : Original Research Paper

Authors

1 Department of Mechanical Engineering Arak University

2 M.Sc. Student, Mechanical Engineering, Arak University, Arak

3 Department of Mechanical Engineering Arak University of Technology

4 School of Mechanic Engineering, Shahrekord University, Shahrekord, Iran

5 Arak Machine Sazi

10.22084/jrstan.2023.27150.1229

Abstract

One of the most suitable and up-to-date bonding technologies is laser welding, due to its low local energy, complete laser beam penetration, heat-affected area, perfectly uniform fusion with minimal distortion, and ultimately residual stresses, Less is created. The use of the laser welding process, due to its high-speed performance and weight loss made by the structure, is now expanding in the industry. This study investigated the ability of a 304L stainless steel laser and st37 low carbon steel to use laser welding with a maximum power of 1000 watts. The effect of process parameters on welding penetration, microscopic structure, heat affected area (HAZ), mechanical properties, and microstructure of laser-affected area were studied and compared with TIG welding. In this research, the mechanical properties and microscopic structure of laser welding in two non-homogeneous sheets of 304 L stainless steel and low-carbon st37 were studied. In this study, with the help of laser energy, an experimental-statistical model based on the DOE method and adjustment of laser parameters was prepared for two non-homogeneous plates with a 2 mm thickness of 304 stainless steel and low carbon steel with the lip-to-lip connection. Then microstructural tests were performed and analyzed by optical microscopy (OM). DOE analyzed the results of microstructures and mechanical properties with the RSM method and optimal settings and results were presented. The above results were performed by laboratory method and re-laser testing was performed and the most ideal parameters and results were obtained.

Keywords

Journal of Stress Analysis

Articles in Press, Accepted Manuscript
Available Online from 27 December 2023

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