Improvement of resistance-spot-welded joints for DP 600 steel and A5052 aluminum alloy with Zn slice interlayer

被引：59
作者：
Chen, Jianbin [1 ,2 ]
Yuan, Xinjian [1 ,2 ]
Hu, Zhan [1 ]
Li, Ting [1 ]
Wu, Kanglong [1 ]
Li, Ci [1 ]
机构：
[1] Chongqing Univ, Coll Mat Sci & Engn, 174 Shazheng St, Chongqing 400044, Peoples R China
[2] Chongqing Univ, Automot Collaborat Innovat Ctr, 174 Shazheng St, Chongqing 400044, Peoples R China
来源：
JOURNAL OF MANUFACTURING PROCESSES | 2017年 / 30卷
关键词：
Resistance spot welding; Aluminum alloy; Advanced high strength steel; Zn interlayer; Mechanical properties; Microstructure; HIGH-STRENGTH STEEL; MECHANICAL-PROPERTIES; AUTOMOTIVE APPLICATIONS; WELDING PROCESS; COATED STEEL; MICROSTRUCTURE; BEHAVIOR; PERFORMANCE; MORPHOLOGY; LAYER;
D O I：
10.1016/j.jmapro.2017.10.009
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The microstructure and mechanical properties of resistance spot welded DP 600 advanced high strength steel and A5052 aluminum alloy joint were improved with 50 mu m Zn slice interlayer. The results showed that the fusion zone (FZ) grain of A5052 was columnar crystal with rough pattern. The microstructure of FZ and the heat affected zone (HAZ) for DP 600 were coarse-lath martensite and ferrite-fine marten site, respectively. The intermetallic compound (IMC) in the interface region included Fe2Al5, Fe4Al13 and Fe11Zn40. The main IMC was present in winding pattern, which could be responsible for the improvement of mechanical properties. The tensile-shear load reached to a maximum value (7.06 kN), increased by 28% as compared to the case without Zn slice interlayer. The obvious plastic deformation took place prior to fracture, and the fracture exhibited plug failure (PF) mode rather than interfacial failure (IF) mode. Many dimples were found on the fracture surface. (C) 2017 The Society of Manufacturing Engineers. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：396 / 405
页数：10
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