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Affiliation of Author(s):机电学院

Journal:Xiyou Jinshu Cailiao Yu Gongcheng

Abstract:In order to study the flow behavior of TA32 titanium alloy, a constitutive model was set up at high temperature. A tensile experiment was carried out at temperatures of 650~850℃ and strain rates of 0.1~0.0001 s-1. The result indicates that the TA32 titanium alloy maintains a relatively good comprehensive performance at high temperature. Work hardening and dynamic recovery are exhibited in the tensile process in the temperature range of 650~750℃ and low strain rate range of 10-1~10-3 s-1. However, the elongation of TA32 increases enormously and strength decreases clearly as the temperature rises to 800℃; at the mean time, a steady stage of stress occurs. The constitutive model of Arrhenius-type was constructed by a specific correction method based on statistics and regularization. The comparison shows a more accurate flow predicted stress through the modified model compared to the conventional least squares model. © 2019, Science Press. All right reserved.

ISSN No.:1002-185X

Translation or Not:no

Date of Publication:2019-03-01

Co-author:Chen, Can,xls,Gong, Zonghui

Correspondence Author:cmh