Microstructure and forming quality of friction stir welding joints of 7075Al 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 intermetallic
compounds Al12Mg17 and Al3Mg2 are found in the welded joint. They cause the increase of microhardness
of welded joint. The maximum tension stress of welded joint is 112MPa.
LI Da1,2 (李达), CUI Zhan-quan2 (崔占全), YANG Qing-xiang2* (杨庆祥),SUN Bing1 (孙兵), SUN Ming-hui2 (孙明辉)
. Microstructure and Property of Friction Stir Welding Joint of 7075Al and AZ31BMg[J]. Journal of Shanghai Jiaotong University(Science), 2012
, 17(6)
: 679
-683
.
DOI: 10.1007/s12204-012-1345-2
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