金属間化合物層を有する銅/アルミニウム摩擦圧接界面端部の応力特異性

概要

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The friction welding for copper and aluminium is useful to minimize the diffusion thickness at the interface between copper and aluminium. The minimization of diffusion thickness is required for maintaining the joint strength. However, it is well known the growth of brittle intermetallic compounds, such as CuAl_2, CuAl and Cu_9Al_4, during the use at high-temperature. The effect of intermetallic compound layers on joint strength characteristics has not fully been clarified. In this study, elastic properties of intermetallic compound layers were investigated using depth-sensing micro-indentation technique. And stress singularities at the intersection of free surfaces and the interface between copper and aluminium were investigated using singular analysis. It was informed that the no free-edge stress singularities existed at the nelghborhood of apex angles of 55゜and 125゜. It was also confirmed using finite element analysis that the reduction of stress concentration could be observed by paying attention to the condition of no free-edge stress singularities in case of the copper and aluminium friction welded joint with brittle intermetallic compound layers.
一般社団法人日本機械学会の論文
2001-05-25