Microstructure and Property of Friction Stir Welding Joint of 7075A1 and AZ31BMg

Microstructure and forming quality of friction stir welding joints of 7075A1 and AZ31BMg with different welding parameters were analyzed. The results show that, good welded joint is obtained when the rotating frequency is 13 r/s and the welding speed is 30 mm/min. An irregular area is formed in the...

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Bibliographic Details
Published in:上海交通大学学报：英文版 2012, Vol.17 (6), p.679-683
Main Author: 李达 崔占全 杨庆祥 孙兵 孙明辉
Format: Article
Language:English
Subjects:
焊接工艺
焊接技术
焊接设备
金属
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Summary:Microstructure and forming quality of friction stir welding joints of 7075A1 and AZ31BMg with different welding parameters were analyzed. The results show that, good welded joint is obtained when the rotating frequency is 13 r/s and the welding speed is 30 mm/min. An irregular area is formed in the welding center. Meanwhile, the river pattern and eddy-like distribution are found in the weld nugget zone. Besides, brittle inter- metallic compounds Al12Mg17 and A13Mg2 are found in the welded joint. They cause the increase of microhardness of welded joint. The maximum tension stress of welded joint is 112 MPa.
ISSN:1007-1172
1995-8188