Materials Transactions Online

Materials Transactions, Vol.53 No.03 (2012) pp.504-507
© 2012 The Japan Institute of Metals

Effects of High Pressure Heat Treatment on Microstructure and Micro-Mechanical Properties of Cu77.96Al22.04 Alloy

Lailei Wu1, Lin Liu2, Jianhua Liu1 and Ruijun Zhang1

1State Key Laboratory of Metastable Materials Science and Technology, Yan Shan University, Qinhuangdao, P. R. China
2Department of Basic Medical, Tangshan Vocational Technology College, Tangshan, P. R. China

The hardness, elastic modulus, and friction coefficient of the Cu77.96Al22.04 alloy before and after treatment at 750°C and 5 GPa for 15 min were measured by nanoindenter. Effects of high pressure heat treatment on its micromechanical properties were discussed. The results show that high pressure heat treatment can refine the microstructures of the Cu77.96Al22.04 alloy, increase its hardness and elastic recovery rate, and decrease its friction coefficient. It also shows that high pressure treatment has little effect on the elastic modulus. As a result, the deformation resistance and the anti-indentation creep of the alloy are improved effectively.

(Received 2011/09/26; Accepted 2011/12/22; Published 2012/02/25)

Keywords: Cu77.96Al22.04 alloy, high pressure heat treatment, nanoindentation, microstructure, mechanical property

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