Transactions of Nonferrous Metals Society of China
JOURNAL OF RAILWAY SCIENCE AND ENGINEERING
|Vol. 11 No. 3 June 2001|
Ti-5Al-2.5ZrELI alloy used at cryogenic temperature
（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