【摘 要】
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Microstructure and forming quality of friction stir welding joints of 7075Al and AZ31BMg with different welding parameters were analyzed.The results show th
【出 处】
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2012 Postdoctoral Symposium of China on Materials Science &a
论文部分内容阅读
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 13r/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 compound Al12Mgl7 and Al3Mg2 are found in the welded joint, which cause the increase of microhardness of welded joint.The maximum tension stress of welded joint is 112MPa.
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