CREEP DEFORMATION AND FRACTURE OF DISPERSOIDS AND SiC PARTICULATES REINFORCED Al BASE COMPOSITES
ZHOU Qing; MA Zongyi; ZHAO Jie; BI Jing; ZHU Shijie; WANG Fugang (Materials Engineering Department; Dalian University of Technology; Dalian 116024)(Institute of Metal Research; The Chinese Academy of Sciences; Shenyang 110015)
Cite this article:
ZHOU Qing; MA Zongyi; ZHAO Jie; BI Jing; ZHU Shijie; WANG Fugang (Materials Engineering Department; Dalian University of Technology; Dalian 116024)(Institute of Metal Research; The Chinese Academy of Sciences; Shenyang 110015). CREEP DEFORMATION AND FRACTURE OF DISPERSOIDS AND SiC PARTICULATES REINFORCED Al BASE COMPOSITES. Acta Metall Sin, 1998, 34(1): 107-112.
Abstract Creep of dispersoids and SiC particulates reinforced aluminium base composites has been studied. Creep rate of the composites is 2-4 orders of magnitude lower than those of the matrix alloy. The creep stress exponent and activation energy of the composites are much larger than those of pure aluminium. The experimental data of creep has been analysed by the threshold stress approach. It is demonstrated that the creep of the composites is controlled by the lattice diffusion of aluminium.
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