AA6111铝合金电阻点焊接头的微观组织特征和准静态失效行为

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Bibliographic Details
Published in中国有色金属学报：英文版 Vol. 24; no. 12; pp. 3879 - 3885
Main Author 吴赛楠 Bita GHAFFARI Elizabeth HETRICK Mei LI 贾志宏 刘庆
Format Journal Article
LanguageEnglish
Published 2014
Subjects
AA6111铝合金
力学性能
显微硬度
显微组织
电阻点焊
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Bibliography:Sai-nan WU, Bita GHAFFARI, Elizabeth HETRICK, Mei LI, Zhi-hong JIA, Qing LIU （1. College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China; 2. Ford Research and Advanced Engineering, Ford Motor Company, Dearborn, MI 48124, USA）
AA6111 aluminum alloy;resistance spot welding;microstructure;microhardness;mechanical properties
43-1239/TG
The microstructure, microhardness and quasi-static failure behavior of resistance spot welds of AA6111-T4 aluminum alloy were experimentally investigated. Optical metallography and high-resolution hardness traverses were utilized to characterize the weld nugget, heat affected zone and base metal. The AA6111 spot welds displayed a softer nugget and hardened heat affected zone, compared with the base metal. The through-thickness hardness of the base metal sheet was not constant and had to be carefully considered to determine the effect of welding on material properties. Quasi-static lap-shear tensile tests were used to determine the failure load and failure mode. All tensile specimens failed through the interfacial fracture. This failure mode is consistent with the observed reduced hardness in the weld nugget.
ISSN:1003-6326