Establishment of Hyperbolic Sine Constitutive Relationship for Ti-6Al-2Zr-1Mo-1V Alloy

Fang Jun; Wang Kelu; Lu Shiqiang; Dong Xianjuan

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Establishment of Hyperbolic Sine Constitutive Relationship for Ti-6Al-2Zr-1Mo-1V Alloy
Vol. 29, Issue 1, Pages: 82-84(2009)
Published： 2009 ，
DOI：

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[1]方军,王克鲁,鲁世强,董显娟.Ti-6Al-2Zr-1Mo-1V合金的双曲正弦本构关系[J].特种铸造及有色合金,2009,29(01):82-84+1.

Fang Jun, Wang Kelu, Lu Shiqiang, et al. Establishment of Hyperbolic Sine Constitutive Relationship for Ti-6Al-2Zr-1Mo-1V Alloy. [J]. Special Casting & Nonferrous Alloys 29(1):82-84(2009)
[1]方军,王克鲁,鲁世强,董显娟.Ti-6Al-2Zr-1Mo-1V合金的双曲正弦本构关系[J].特种铸造及有色合金,2009,29(01):82-84+1. DOI：

Fang Jun, Wang Kelu, Lu Shiqiang, et al. Establishment of Hyperbolic Sine Constitutive Relationship for Ti-6Al-2Zr-1Mo-1V Alloy. [J]. Special Casting & Nonferrous Alloys 29(1):82-84(2009) DOI：

摘要

用THERMECMASTOR-Z型热模拟试验机对Ti-6Al-2Zr-1Mo-1V合金进行了变形温度为750～1100℃

应变速率为10-1～10s-1

变形程度为50%的热压缩试验。研究了变形工艺参数对流动应力的影响

计算了不同温度范围的应力指数n和变形激活能Q

并建立了该合金的双曲正弦本构方程。结果表明

在750～950℃时

该合金的真应力-应变曲线呈流动软化型

1000～1100℃时呈稳态流动型;在750～1000℃时变形激活能为828.9kJ/mol

1000～1100℃时为197.1kJ/mol

预示在不同的温度区间具有不同的变形机制。

Abstract

High temperature compression testing for Ti-6Al-2Zr-1Mo-1V alloy was carried out by thermecmastor-Z simulator with strain rate from 0.1 to 10s-1 and 50% deformation degree at 750

100℃. Effects of deformed processing parameters on the flow stress were examined

and stress exponent and activation energy were calculated at different temperatures

meanwhile

the hyperbolic sine constitutive equation for the alloy was established. The results indicate that true stress-strain curves of the alloy are characterized by flow softening behavior at 750

50℃ while it is characterized by steady flow behavior at 1000

100℃. In addition

deformation activation energy Q is 828.9kJ/mol at 750

000℃ and 197.1kJ/mol at 1000

100℃

showing different deformation mechanism at different temperature ranges.