Numerical Simulation of Residual Stress and Deformation of SUS310S Stainless Steel Local Vacuum Electron Beam Welded Joint

doi:10.3901/JME.2020.21.038

Abstract

Abstract: As a new welding method, local vacuum electron beam welding is often used to fabricate thick austenitic stainless-steel welded joints. The welding residual stress and deformation of these joints have always been the focus of attention. A SUS310S austenitic stainless-steel butt joint with a thickness of 40 mm is welded by local vacuum electron beam equipment. Optical microscope and Vickers hardness tester are used to characterize the microstructure and hardness distribution of the joint, respectively. Hole-drilling strain-gauge method and trilinear coordinates measuring instrument are employed to measure the residual stress and the out-of-plane deformation of this joint, respectively. Based on the ABAQUS finite element software platform, a combined heat source model is developed to simulate the heat input in the local vacuum electron beam welding process, then the "thermal-elastic-plastic" finite element calculation method is developed to simulate the residual stress and deformation of SUS310S thick plate butt joint. The simulation results agree well with the experimental data, which verifies the effectiveness of the combined heat source model and the “thermal-elastic-plastic” finite element method developed. Meanwhile, the residual stress distribution and welding deformation of the local vacuum electron beam welded joint are also discussed in detail based on the simulation results.

Key words: local vacuum electron beam welding, SUS310S stainless steel, combined heat source model, residual stress, welding deformation

CLC Number:

TG156

HU Xing, PENG Zhaocheng, FENG Guangjie, LI Suo, DENG Dean, YUAN Jun. Numerical Simulation of Residual Stress and Deformation of SUS310S Stainless Steel Local Vacuum Electron Beam Welded Joint[J]. Journal of Mechanical Engineering, 2020, 56(21): 38-47.

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