Laser Welding of Dissimilar Metal Joint of 6061 Al Alloy and Al Matrix Composite

被引：8

作者：

Dai, Jun ^{[1
,2
]}

Yu, Banglong ^{[1
]}

Jiang, Wei ^{[1
]}

Htun, Hla Min ^{[3
]}

Liu, Zheng ^{[4
]}

机构：

[1] Changshu Inst Technol, Sch Automot Engn, Changshu 215500, Jiangsu, Peoples R China

[2] Shanghai Jiao Tong Univ, Shanghai Key Lab Mat Laser Proc & Modificat, Shanghai 200240, Peoples R China

[3] Mandalay Technol Univ, Dept Mech Engn, Mandalay 05072, Myanmar

[4] Suzhou Top Inst Informat Technol, Sch Modern Technol, Kunshan 215311, Peoples R China

来源：

ADVANCES IN MATERIALS SCIENCE AND ENGINEERING | 2019年 / 2019卷

基金：

中国国家自然科学基金;

关键词：

Corrosion resistance;

D O I：

10.1155/2019/2359841

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In this paper, dissimilar metal joints of 6061 aluminum alloy and aluminum matrix composite material are investigated by laser welding. TiB2 particles were added into the lap joint. The welding process, microstructure, and the corrosion properties of welding joints are examined. The results demonstrate that the selected optimization process parameters are laser power 6kW, welding speed 0.6mm/s, pulse width 11.5ms, and laser frequency 4.5Hz. There are a few obvious pores in the molten pool. Al2Ti, Fe2Si, and Al0.5Fe3Si0.5 are present in the microstructure. During the welding process, some TiB2 particles are decomposed and reacted with molten Al. Other TiB2 particles are nucleated and solidified, and the excess TiB2 particles are pushed to the grain boundaries by molten Al. TiB2 particles are wetted well by molten matrix metal. The corrosion resistance of alloys in different conditions decreased in the following order: the weld beam >6061 Al>AMC.

引用

页数：6

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