Study of desirable precipitate-strengthening effects on friction-stir welded joints of third-generation Al-Cu-Li alloys

被引：8
作者：
Wang, Dongyao [1 ]
Zhan, Lihua [1 ,2 ]
Zeng, Quanqing [2 ]
He, Diqiu [1 ,2 ]
Gan, Kefu [3 ]
机构：
[1] Cent South Univ, Coll Mech & Elect Engn, Changsha 410083, Hunan, Peoples R China
[2] Cent South Univ, Res Inst Light Alloy, Changsha 410083, Hunan, Peoples R China
[3] Cent South Univ, Sch Mat Sci & Engn, Changsha 410083, Hunan, Peoples R China
来源：
PHILOSOPHICAL MAGAZINE LETTERS | 2021年 / 101卷 / 12期
关键词：
Al-Cu-Li alloy; friction stir welding; microstructure; precipitate; mechanical properties; MECHANICAL-PROPERTIES; HEAT-TREATMENT; MICROSTRUCTURE; EVOLUTION;
D O I：
10.1080/09500839.2021.1980833
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A friction-stir welded Al-Cu-Li alloy plate with desirable mechanical performance has been obtained using specific parameters. The microstructures of the nugget zone were systematically characterised and nano-sized phases, including delta', theta' and T-1 were found in its matrix. These phases enhance the strength of the joint to a level comparable with the base metal. The results provide the means of obtaining a reliable and low-cost friction-stir weld (FSW) joint for T3-tempered Al-Cu-Li alloy plates without any post-welding heat treatments. This study shows that, by using appropriate parameters of FSW, the microstructures and mechanical precipitates of the nugget zone can be controlled to enhance the weld quality.
引用
收藏
页码：474 / 483
页数：10
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