Improvement of fatigue life in post-weld cold worked aluminum resistant spot welds

被引：0

作者：

Kim, D.

Blake, D. M.

Ryu, S. J.

Lim, B. S. ^{[1
]}

机构：

[1] Sungkyunkwan Univ, Sch Mech Engn, Gyeonggi 440746, South Korea

[2] Washington State Univ, Sch Engn & Comp Sci, Vancouver, WA 98686 USA

[3] Sungkyunkwan Univ, Grad Sch, Gyeonggi 440746, South Korea

来源：

INTERNATIONAL JOURNAL OF AUTOMOTIVE TECHNOLOGY | 2006年 / 7卷 / 05期

关键词：

spot weld; cold working; aluminum; fatigue; residual stress; microhardness;

D O I：

暂无

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

Aluminum Resistance Spot Weld (Al RSW) is an enabling technology for body assembly of low mass fraction vehicles. Due to the unreliable durability of spot-welded joints, applications of Al RSW are limited. This study presents experimental investigation on the use of a post-weld cold working process to improve the fatigue strength of Al RSW. The post-weld cold working process includes special shaped indenters; that are pressed or driven into the structure to induce compressive residual stresses. The mechanical properties of the post-weld cold worked Al RSW were investigated, including the experimental results of fatigue and micro-hardness tests. Comparisons of the mechanical properties and qualitative results between the as-welded RSW specimens and the post-weld cold worked RSW specimens are discussed. The post-weld cold worked Al RSW samples had an increase in both microhardness and fatigue life.

引用

页码：579 / 584

页数：6