Flow Behavior of TA32 Titanium Alloy at High Temperature and Its Constitutive Model

被引：0

作者：

Chen Can ^{[1
]}

Chen Minghe ^{[1
]}

Xie Lansheng ^{[1
]}

Gong Zonghui ^{[1
]}

机构：

[1] Nanjing Univ Aeronaut & Astronaut, Nanjing 210001, Jiangsu, Peoples R China

来源：

RARE METAL MATERIALS AND ENGINEERING | 2019年 / 48卷 / 03期

关键词：

TA32 titanium alloy; constitutive model; high temperature flow behavior; regularization method; DEFORMATION-BEHAVIOR; MICROSTRUCTURE;

D O I：

暂无

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

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 similar to 850 degrees C and strain rates of 0.1 similar to 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 similar to 750 degrees C and low strain rate range of 10(-1)similar to 10(-3) s(-1). However, the elongation of TA32 increases enormously and strength decreases clearly as the temperature rises to 800 degrees C; 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.

引用

页码：827 / 834

页数：8

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