【摘 要】
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This paper mainly concentrated on the feasibility of friction stir welding of dissimilar metal of aluminum alloy to copper (T2) and a preliminary analysis of we
【机 构】
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State Key Laboratory of Gansu Advanced Non-ferrous Metal Materials,Qinghai Oilfield Construction Co.
论文部分内容阅读
This paper mainly concentrated on the feasibility of friction stir welding of dissimilar metal of aluminum alloy to copper (T2) and a preliminary analysis of welding parameters influencing on the microstructures and properties of joint was carried out. The results indicated that the thickness of workpiece played an important role in the welding parameters which could succeed in the friction stir welding of dissimilar metal of copper to aluminum alloy, and the parameters were proved to be a narrow choice. The interfacial region between copper and aluminum in the dissimilar joint was not uniformly mixed, constituted with part of incomplete mixing zone, complete mixing zone, dispersion zone and the most region's boundary was obvious. Meantime a kind banded structure with inhomogeneous width was formed. The intermetallic compounds generated during friction stir welding in the interfacial region were mainly Cu9Al4 , Al2Cu etc, and their hardness was higher than others.
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