Mechanical and fatigue behaviour of laser and resistance spot welds in advanced high strength steels

被引：53
|
作者：
Daneshpour, S. [1 ]
Riekehr, S. [1 ]
Kocak, M. [1 ]
Gerritsen, C. H. J. [2 ]
机构：
[1] GKSS Forschungszentrum Geesthacht GmbH, Inst Mat Res, Geesthacht, Germany
[2] ArcelorMittal Res Ind Gent, OCAS NV, Steel Solut & Design Dept, B-9060 Zelzate, Belgium
来源：
SCIENCE AND TECHNOLOGY OF WELDING AND JOINING | 2009年 / 14卷 / 01期
关键词：
Fatigue; AHSS; Dual phase steels; Laser spot welding; Resistance spot welding; Failure analysis;
D O I：
10.1179/136217108X336298
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A study was carried out on laser and resistance spot welds in overlapped sheets of dual phase advanced high strength steel (DP780) and deep drawing steel (DC04) of 2(.)0 mm in thickness. The aim of the study was to investigate the fatigue performance of these joints under tensile shear loading as well as the monotonic performance for applications in the automotive industry. The mechanical properties, failure behaviour and fatigue life analyses of spot welds in similar and dissimilar joints were investigated by experimental and numerical methods. The structural stress concept was used to describe the fatigue lives of spot welded specimens. The results revealed different failure types with different fatigue behaviours for laser and resistance spot welds under the application of cyclic loads at 'high load' and 'low load' levels.
引用
收藏
页码：20 / 25
页数：6
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