Deformation behaviour of spot-welded high strength steels for automotive applications

被引：87
作者：
Brauser, S. [1 ]
Pepke, L. A. [1 ]
Weber, G. [1 ]
Rethmeier, M. [1 ]
机构：
[1] BAM Fed Inst Mat Res & Testing, D-12205 Berlin, Germany
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2010年 / 527卷 / 26期
关键词：
Resistance spot welding; Deformation behaviour; Advanced high strength steel; TRIP steel; Similar and dissimilar material spot weld; EBSD; SEM; Strain field; RESISTANCE; FAILURE; MICROSTRUCTURE; SHEAR; SIZE;
D O I：
10.1016/j.msea.2010.07.091
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Numerical simulation of component and assembly behaviour under different loading conditions is a main tool for safety design in automobile body shell mass production. Knowledge of local material behaviour is fundamental to such simulation tests. As a contribution to the verification of simulation results, the local deformation properties of spot-welded similar and dissimilar material joints in shear tension tests were investigated in this study for a TRIP steel (HCT690T) and a micro-alloyed steel (HX340LAD). For this reason, the local strain distribution was calculated by the digital image correlation technique (DIC). On the basis of the hardness values and microstructure of the spot welds, the differences in local strain between the selected material combinations are discussed. Additionally, the retained austenite content in the TRIP steel was analysed to explain the local strain values. Results obtained in this study regarding similar material welds suggest significant lower local strain values of the TRIP steel HCT690T compared to HX340LAD. One reason could be the decrease of retained austenite in the welded area. Furthermore, it has been ascertained that the local strain in dissimilar material welds decreases for each component compared with the corresponding similar material weld. (C) 2010 Elsevier B.V. All rights reserved.
引用
收藏
页码：7099 / 7108
页数：10
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