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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 17    Special 1    November 2007

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Effect of deformation processing parameter on microscopic structure of
Ti14 alloy under semi-solid
GUO Ping(郭  萍), ZHAO Yong-qing(赵永庆), WU Wei-lu(吴玮璐)

Titanium Alloy Research Center, Northwest Institute for Nonferrous Metal Research,
P.O. Box, 51 Xi’an 710016, China

Abstract:Hot compressive deformation test of Ti-Al-Cu-Si alloy was performed on Gleeble-3500 hot-Simulator over the range of deformation temperature from 1 000 to 1 300 ℃, strain rate from 0.005 s−1 to 5 s−1, deformation degree from 40% to 70%, and samples of d 8 mm×15 mm were used. Change rules of microstructure were mainly studied. The results show that deformation temperature directly influences the nucleation growth and globurizing of grain, and with the temperature rising, the diameter of grain increases, the grain boundary widens. The effect of deformation degree on microstructure varies with deformation temperature. Equivalent diameter of grains shows a trend of falling before elevation with strain rate increasing and temperature rising.

 

Key words: Ti14 titanium; semi-solid deformation; microscopic structure

ISSN 1672-7029
CN 43-1423/U

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