Failure analysis of dissimilar thickness resistance spot welded joints in dual-phase steels during tensile shear test

被引：40

作者：

Zhang, Hongqiang ^{[1
]}

Qiu, Xiaoming ^{[1
]}

Xing, Fei ^{[1
]}

Bai, Jie ^{[1
]}

Chen, Jianhe ^{[2
]}

机构：

[1] Jilin Univ, Key Lab Automobile Mat, Minist Educ, Sch Mat Sci & Engn, Changchun 130025, Peoples R China

[2] Sanyou Automobile Parts Mfg Co Ltd, Changchun 130022, Peoples R China

来源：

MATERIALS & DESIGN | 2014年 / 55卷

关键词：

Ferrous metals and alloys; Welding; Fracture; MECHANICAL PERFORMANCE; MODE TRANSITION; DP600; MICROSTRUCTURE; SINGLE; SIZE;

D O I：

10.1016/j.matdes.2013.09.040

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Investigating the failure mode and failure mechanism of the dissimilar thickness dual phase sheets resistance spot welding joints was the objective of this study. Three distinct failure modes were observed during the tensile shear test: interfacial, partial interfacial and pullout failure. The results of the stress analysis of welded joints show that the tensile stress leads to the interfacial failure and the shear stress leads to the pullout failure. Due to more serious stress concentration and heat affected zone (HAZ) softening of DP780 side, the fracture is initiated from the DP780 steel. (C) 2013 Elsevier Ltd. All rights reserved.

引用

页码：366 / 372

页数：7

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