GMA Spot Welding of A7075-T651/AZ31B Dissimilar Alloys Using Stainless Steel Filler

被引：3
|
作者：
Ishak, M. [1 ,2 ]
Islam, M. R. [1 ]
Sawa, T. [3 ]
机构：
[1] Univ Malaysia Pahang, Fac Mech Engn, Kuantan, Pahang, Malaysia
[2] Univ Malaysia Pahang, Automot Engn Ctr, Kuantan, Pahang, Malaysia
[3] Hiroshima Univ, Grad Sch Engn, Hiroshima, Japan
来源：
MATERIALS AND MANUFACTURING PROCESSES | 2014年 / 29卷 / 08期
关键词：
A7075-T651; AZ31B; Dissimilar; Fracture; GMA; Spot; Toughness; Welding; MAGNESIUM ALLOY; MICROSTRUCTURE CHARACTERISTICS; MECHANICAL-PROPERTIES; ALUMINUM-ALLOY; LAP JOINTS; AL-ALLOY; TEMPERATURE; EVOLUTION; ARC;
D O I：
10.1080/10426914.2014.892614
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The aim of this research was to investigate the welding joint's fracture toughness and fracture surface morphologies between A7075-T651 aluminum and AZ31B magnesium dissimilar alloys welded using a new technique of gas metal arc spot lap welding with unconventional ER308L-Si stainless steel filler. The fracture toughness of the welding joints was estimated from yield strength and absorbed charpy impact energy of the joints using Rolfe-Novak-Barsom correlation, and was compared with the fracture toughness of AZ31B parent metal. Fracture surface morphologies were investigated by scanning electron microscopy. The results showed that the joint can achieve a maximum fracture toughness of 93.08% of the AZ31B parent metal. Most of the joints failed at AZ31B alloy, while some failed at A7075-T651 alloy and ER308L-Si nugget. Brittle fracture mechanism was observed for all the joints. It was found that the new gas metal arc spot lap welding technique with ER308L-Si filler could offer very good mechanical properties.
引用
收藏
页码：980 / 987
页数：8
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