Page 135 - 机械工程材料2025年第三期

薛 河，等：基于压入响应的异种金属焊接接头材料力学性能计算方法

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Calculation Method of Material Mechanical Properties of Dissimilar Metal
Welded Joint Based on Indentation Response

XUE He , YANG Chao , ZHANG Yubiao , NING Shuo , ZHANG Jiaqing , ZHU Jiajun , ZHANG Jianlong 2
1
1
1
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1
(1. School of Mechanical Engineering, Xi'an University of Science and Technology, Xi'an 710054, China;
2. Xi'an Special Equipment Testing Institute, Xi'an 710065, China)
Abstract: Based on the Hollomon constitutive model, the relationship between different mechanical property
parameters of materials (yield stress and strain hardening index) and the indentation response parameters (loading
curvature and loading index) of the loading section of the load-displacement curve was analyzed by indentation test
simulation by ABAQUS finite element analysis software and the method of controlling single variable. The prediction
formula of the mechanical property parameters of the materials derived from the response parameters of the loading
section was established, and the yield stress and strain hardening index entered in the finite element analysis were used as
the conventional truth values to verify the accuracy of the prediction method. The material mechanical property parameter
distribution of SA508 steel/52M alloy surfacing layer/52M alloy butt weld/316L steel dissimilar metal welded joint was
obtained by this prediction method. The results show that the absolute relative errors of yield stress and strain hardening
index calculated by the prediction formula were 10.5% and 6.29%, respectively. The formula could accurately predict
the material mechanical property parameters of the local area of the dissimilar metal welded joint. The yield stress and
strain hardening index of the heat affected zone on both sides of the dissimilar metal welded joint by calculation changed
obviously, and the yield stress decreased while the strain hardening index increased with the increase of the distance from
the fusion line. The yield stress and strain hardening index distribution of base metal and 52M alloy surfacing layer and
butt weld were relatively stable.
Key words: dissimilar metal welded joint; load-displacement curve; indentation response parameter; mechanical
property parameter

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