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

页码：249 / 258

页数：10

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