Friction stir welding of 5052 aluminum alloy plates

被引:59
作者
Kwon, Yong-Jai [1 ]
Shim, Seong-Beom [2 ]
Park, Dong-Hwan [2 ]
机构
[1] Univ Ulsan, Sch Mat Sci & Engn, Ulsan 680749, South Korea
[2] Univ Ulsan, Inst E Vehicle Technol, Ulsan 680749, South Korea
来源
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA | 2009年 / 19卷
关键词
friction stir welding; aluminum alloy; microstructure; mechanical properties; RECRYSTALLIZATION; DEFORMATION;
D O I
10.1016/S1003-6326(10)60239-7
中图分类号
TF [冶金工业];
学科分类号
0806 ;
摘要
Friction stir welding between 5052 aluminum alloy plates with a thickness of 2 mm was performed. The tool for welding was rotated at speeds ranging from 500 to 3 000 r/min under a constant traverse speed of 100 mm/min. The results show that at all tool rotation speeds, defect-free welds are Successfully obtained. Especially at 1 000, 2 000 and 3 000 r/min, the welds exhibit very smooth surface morphologies. At 500, 1 000, and 2 000 r/min, onion ring structure is clearly observed in the friction-stir-welded zone (SZ). In addition, the onion ring structure region becomes wider as the tool rotation speed is increased. The gain size in the SZ is smaller than that in the base metal, and is decreased with a decrease of the tool rotation speed. In all tool rotation speeds, the SZ exhibits higher average hardness than the base metal. Especially at 500 r/min, the average hardness of the SZ reaches a level about 33% greater than that of the base metal. At 500, 1 000 and 2 000 r/min, the tensile strength of the friction stir welded (FSWed) plates is similar to that of the base metal (about 204 Wit). The elongation of the FSWed plates is lower than that of the base metal (about 22%). However, it is noticeable that the maximum elongation of about 21% is obtained at 1 000 r/min.
引用
收藏
页码:S23 / S27
页数:5
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