Numerical Simulation of Stress Distribution of AZ31B Magnesium Alloy/LY12 Aluminum Alloy Diffusion Welded Joint

Abstract:

The finite element model of diffusion bonding was established based on the analysis software of ANSYS, and the stress distribution characteristics of AZ31B/LY12 vacuum diffusion welded joint using Cu foil as the intermediate layer were analyzed. The effects of three factors, the welding temperature, the thickness of the intermediate layer Cu foil and the welding pressure, on the stress distribution of the AZ31B/Cu/LY12 joint were studied. The simulation results show that, when diffusion bonding of AZ31B and LY12 with intermediate layer Cu, the stress located on the center area of joint distribution is uniform, while the edge stress value is larger; welding parts along the axial stress distribution does not change significantly, while the maximum axial stress increases slightly when the temperature increases from 520 to 540 °C; when the thickness of intermediate layer Cu foil changes from 50 to 100 μm, the maximum shear stress value increases, while the position of that has no significant change; The stress distribution does not change, while the region of high stress increases when the welding pressure changes from 1 to 3 MPa.

• Periodical: Key Engineering Materials (Volume 727)
• Pages: 143-148
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.727.143
• Online since: January 2017
• Authors: Ling Ming Kong, Shuang Ming Du*, Yu Jie Xia, Jun Hui Li
• Keywords: Aluminum Alloy, Diffusion Bonding, Finite Element Analysis, Magnesium Alloy, Stress Distribution

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