Numerical and experimental investigations of distortion and residual stress in 316L stainless steel plates caused by laser welding

Date

2025-3-21

Author

Gökkaya, Emre Denizcan

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Welding-induced distortion and residual stress are crucial because they can significantly impact the structural integrity and performance of welded components. The progress of computational power and software has simplified the implementation of the finite element method in the analysis of welding processes, allowing for a deeper understanding of the formation of residual stress and distortion, and thus their minimization. Laser welding joins metal components with a narrower heat-affected zone and less distortion than conventional welding methods like resistance spot welding and TIG/MIG welding. In this study, to optimize laser welding process parameters for better mechanical performance and dimensional stability, the effects of laser power and welding speed on the distortion and residual stress state in the 316L stainless steel plates were investigated using the Simufact Welding software. The simulation results were validated via measurements using height gauge equipment for distortion and the X-ray diffraction method for residual stress.

Subject Keywords

Welding technologies, Laser welding of stainless steel, Integrated computational materials engineering, Modelling & simulation, Residual stress & distortion

URI

https://hdl.handle.net/11511/114167

Collections

Graduate School of Natural and Applied Sciences, Thesis