Natural aging of heterogeneous arc-welded AA6061-AA7075 joints with nanocomposite filler

被引：4
|
作者：
Murali, Narayanan [1 ]
Zheng, Shiqi [1 ]
Chi, Yitian [2 ]
Li, Xiaochun [1 ,2 ]
机构：
[1] Univ Calif Los Angeles, Dept Mat Sci & Engn, Los Angeles, CA 90095 USA
[2] Univ Calif Los Angeles, Dept Mech & Aerosp Engn, Los Angeles, CA 90095 USA
来源：
SCIENCE AND TECHNOLOGY OF WELDING AND JOINING | 2023年 / 28卷 / 04期
关键词：
welding; nanocomposites; aluminium alloys; mechanical properties; microstructure; natural aging; MECHANICAL-PROPERTIES; MICROSTRUCTURE; SOLIDIFICATION; ALUMINUM; BEHAVIOR; CAST;
D O I：
10.1080/13621718.2022.2148066
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We report the dissimilar joining of aluminium alloys 6061 and 7075 using filler rods nano-treated with TiC nanoparticles. TiC enables the formation of a fine and equiaxial weld metal microstructure while preventing the formation of hot cracks. Dissimilar joints were also naturally aged, and their strength evolutions were tracked over 8 weeks and compared to a nano-treated, homogeneous AA7075 joint. Heterogeneous weld metals regained over 30 HV with a mix of MgZn2 and Mg2Si strengthening phases. Nano-treatment thus shows great promise, being able to facilitate the fusion welding of a traditionally difficult-to-weld system and enable a natural aging response between two artificially aged alloys.
引用
收藏
页码：249 / 258
页数：10
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