Microstructure characterization and quasi-static failure behavior of resistance spot welds of AA6111-T4 aluminum alloy

被引：19

作者：

Wu, Sai-nan ^{[1
]}

Ghaffari, Bita ^{[2
]}

Hetrick, Elizabeth ^{[2
]}

Li, Mei ^{[2
]}

Jia, Zhi-hong ^{[1
]}

Liu, Qing ^{[1
]}

机构：

[1] Chongqing Univ, Coll Mat Sci & Engn, Chongqing 400044, Peoples R China

[2] Ford Motor Co, Ford Res & Adv Engn, Dearborn, MI 48124 USA

来源：

TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA | 2014年 / 24卷 / 12期

关键词：

AA6111 aluminum alloy; resistance spot welding; microstructure; microhardness; mechanical properties; 6061-T6;

D O I：

10.1016/S1003-6326(14)63546-9

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

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.

引用

页码：3879 / 3885

页数：7

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