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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 11    No. 3    June 2001

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Mechanical properties and deformation behavior of
Ti-5Al-2.5ZrELI alloy used at cryogenic temperature
LIU Ya-xiu(刘雅秀), QIAN Dong-fan(千东范),
GAO Bao-dong(高宝东), WANG Jiang-bo(王江波),
WANG Xiao-hua(王晓华), FENG Zhao-wei(冯昭伟)

General Research Institute for Nonferrous Metals of Beijing,
Beijing 100088, P.R.China

Abstract:  The mechanical properties and deformation behavior of Ti-5Al-2.5 ZrELI alloy compared with Ti-5Al-2.5 SnELI at 4.2?K, 20 K and 293 K were investigated. The results show that the new titanium alloy Ti-5Al-2.5ZrELI has more consistent properties because of its uniform microstructure and less segregation. It has  good elongation and ductility. The fracture surfaces are covered with elongated dimples at cryogenic temperatures. The deformation mode at 293 K, 20 K and 4.2 K are twinning and slipping.

 

Key words:   Ti-5Al-2.5ZrELI; cryogenic temperature; microstructure; deformation behavior

ISSN 1672-7029
CN 43-1423/U

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