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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 9    No. 3    September 1999

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High temperature creep property of silicon particles reinforced high Al Zn-based alloys
Zhang Liming(张利明)1, 2  Ding Zhimin(丁志敏)2   Lao Bin(劳 彬)3

1. Department of Materials Engineering,Dalian University of Technology, Dalian 116028, P.R.China;
2. Department of Materials Science and Engineering,Dalian Railway Instiute, Dalian 116024, P.R.China;
3. Shanghai Automobils Industry Group, Shanghai200006, P.R.China

Abstract:The deformation creep characteristics of as-cast silicon particles reinforced zinc-based alloys (Si/ ZA27) were determined by high temperature creep experiments at 453K and 61.1MPa condition. The experimental results indicated that the minimum creep rate of the silicon-containing alloys are about three fifth of that of the matrix alloy(ZA27). The deformation process is mainly controlled by grain boundary sliding mechanism. Both dislocation climb and disperse silicon phase are also contributed to it. Micro-structural changes were investigated during the deformation experiments.

 

Key words: particle; reinforcing ZA27; creep property

ISSN 1672-7029
CN 43-1423/U

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