Effect of rolling process on fatigue performance of stir zone of AA6061-T6 doube-side friction stir welding joint

被引：4
|
作者：
Du, Chengchao [1 ]
Pan, Qiuhong [1 ]
Chen, Shujin [2 ]
Tian, Shuang [3 ]
机构：
[1] Jiangsu Univ, Sch Mat Sci & Engn, Zhenjiang 212013, Jiangsu, Peoples R China
[2] Jiangsu Univ Sci & Technol, Sch Mat Sci & Engn, Zhenjiang, Jiangsu, Peoples R China
[3] Southeast Univ, Sch Mat Sci & Engn, Nanjing, Peoples R China
来源：
FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES | 2021年 / 44卷 / 03期
关键词：
fatigue; fracture; friction stir welding; lamellar structure; rolling; MECHANICAL-PROPERTIES; ALUMINUM-ALLOY; ULTRASONIC VIBRATIONS; CRACK INITIATION; GRAIN ROTATION; MICROSTRUCTURE; BEHAVIOR; SURFACE; STRESS; GROWTH;
D O I：
10.1111/ffe.13391
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
Stir zone (SZ) of AA6061-T6 double-side friction stir welding (DS-FSW) joint with a thickness of 6 mm had a poor fatigue performance compared with that of base metal (BM). The rolling process was employed to improve the fatigue performance of SZ. The results showed that rolling process increased the dislocation density in SZ and remarkably enhanced its fatigue performance. The crack initiation played a key role in the fatigue performance of SZ. It relied on the debonding of lamellar structure in SZ. The debonding of lamellar structure depended on the cracking of fine grain layer in lamellar structure.
引用
收藏
页码：748 / 761
页数：14
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