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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 11    No. 2    April 2001

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Microstructure and thermal stability of
mechanically alloyed Al3Ti/Al alloy
LIN Jian-guo(林建国)1,2, WEI Hao-yan(魏浩岩)2, HUANG Zheng(黄 正)2

1. Department of Physics, Xiangtan University, Xiangtan 411105, P.R.China;
2. Department of Materials Science and Engineering,
Beijing University of Aeronautics and Astronautics, Beijing 100083, P.R.China

Abstract:The microstructure stability of Al3Ti/Al alloy prepared by mechanical alloying (MA) was investigated in the simulating environment in which they may be used. The results show that the MA alloy possesses fine microstructure (the grain size is about 0.5 μm). After cycling loaded followed by heat exposure at 350 ℃ for 24 h, no microstructure coarsening of the alloy occurred, which means that the Al3Ti/Al alloy behaves good microstructure stability at high temperature. The compression yield strength of the alloy reaches up to 247 MPa at 350℃.

 

Key words: mechanical alloying; Al3Ti/Al alloy; microstructure stability; thermal stability

ISSN 1672-7029
CN 43-1423/U

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