Resistance rivet welding of magnesium/steel dissimilar materials

被引：19
作者：
Niu, Sizhe [1 ,2 ]
Lou, Ming [1 ,2 ]
Ma, Yunwu [3 ]
Yang, Bingxin [1 ,2 ]
Shan, He [1 ,2 ]
Li, Yongbing [1 ,2 ]
机构：
[1] Shanghai Jiao Tong Univ, Sch Mech Engn, Shanghai Key Lab Digital Manufacture Thin Walled, Shanghai 200240, Peoples R China
[2] Shanghai Jiao Tong Univ, State Key Lab Mech Syst & Vibrat, Shanghai 200240, Peoples R China
[3] Osaka Univ, Joining & Welding Res Inst, 11-1 Mihogaoka, Ibaraki, Osaka 5670047, Japan
来源：
MATERIALS LETTERS | 2021年 / 282卷
基金：
中国国家自然科学基金;
关键词：
Welding; Solidification; Mg/steel welding; Hollow sphere weld; Microstructure; Mechanical performance; MECHANICAL-PROPERTIES; MG; MICROSTRUCTURE; INTERFACE; ALLOY;
D O I：
10.1016/j.matlet.2020.128876
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Welding of magnesium (Mg)/steel faces huge challenges due to the extremely low mutual solid solubility. In this paper, the resistance rivet welding (RRW) was used to join Mg alloy to steel for the first time, and a metallurgical-mechanical hybrid joint was formed among the semi-tubular rivet, Mg alloy and sheet steel. A steel hollow sphere weld was formed by fusion welding between steel rivet and lower steel sheet, with re-solidified Mg alloy maintained inside it. The microstructure of the hollow sphere weld consisted of lath-like martensite. The welds present both interfacial fracture (IF) mode and button pullout fracture (BPF) mode in tensile shear tests and the strength reaches the maximum of 4381 kN at 7 kA-200 ms with BPF mode. The failure mechanism of the hollow sphere weld for IF shows the ductile characteristic, and the fracture characteristics of Mg sheet for BPF show the mixture of ductility and brittleness. This study provided an alternative technology for welding Mg/steel immiscible materials. (C) 2020 Elsevier B.V. All rights reserved.
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页数：4
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