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IMPROVEMENT OF FATIGUE LIFE IN POST-WELD COLD WORKED ALUMINUM RESISTANT SPOT WELDS  

Kim, D. (School of Engineering and Computer Science, Washington State University Vancouver)
Blake, D.M. (School of Engineering and Computer Science, Washington State University Vancouver)
Ryu, S.J. (Graduate School, Sungkyunkwan University)
Lim, B.S. (School of Mechanical Engineering, Sungkyunkwan University)
Publication Information
International Journal of Automotive Technology / v.7, no.5, 2006 , pp. 579-584 More about this Journal
Abstract
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.
Keywords
Spot weld; Cold working; Aluminum; Fatigue; Residual Stress; Microhardness;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
Times Cited By Web Of Science : 1  (Related Records In Web of Science)
Times Cited By SCOPUS : 0
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