Hot Deformation Behavior and Constitutive Modeling of Ti-10.2Mo-4.9Zr-5.5Sn Alloy

Wan Peng; Wang Kelu; Lu Shiqiang; Chen Xuhuai; Zhou Feng

doi:10.15980/j.tzzz.2018.09.029

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Hot Deformation Behavior and Constitutive Modeling of Ti-10.2Mo-4.9Zr-5.5Sn Alloy
Vol. 38, Issue 9, Pages: 1034-1038(2018)
Published： 2018 ，
DOI： 10.15980/j.tzzz.2018.09.029

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[1]万鹏,王克鲁,鲁世强,陈虚怀,周峰.Ti-10.2Mo-4.9Zr-5.5Sn合金热变形行为及本构关系研究[J].特种铸造及有色合金,2018,38(09):1034-1038.

Wan Peng, Wang Kelu, Lu Shiqiang, et al. Hot Deformation Behavior and Constitutive Modeling of Ti-10.2Mo-4.9Zr-5.5Sn Alloy. [J]. Special Casting & Nonferrous Alloys 38(9):1034-1038(2018)
[1]万鹏,王克鲁,鲁世强,陈虚怀,周峰.Ti-10.2Mo-4.9Zr-5.5Sn合金热变形行为及本构关系研究[J].特种铸造及有色合金,2018,38(09):1034-1038. DOI： 10.15980/j.tzzz.2018.09.029.

Wan Peng, Wang Kelu, Lu Shiqiang, et al. Hot Deformation Behavior and Constitutive Modeling of Ti-10.2Mo-4.9Zr-5.5Sn Alloy. [J]. Special Casting & Nonferrous Alloys 38(9):1034-1038(2018) DOI： 10.15980/j.tzzz.2018.09.029.

摘要

采用Gleeble-3500型热模拟试验机对Ti-10.2Mo-4.9Zr-5.5Sn合金进行等温恒应变速率压缩试验

研究其在变形温度为670

20℃

应变速率为0.001

-1

范围内的热变形行为

并计算了热变形激活能。结果表明

合金的流动应力对变形温度和应变速率较为敏感

变形温度升高和应变速率减小都会使流动应力降低。该合金的热变形激活能高于纯α钛和和纯β钛合金的自扩散激活能;采用多元线性回归方法建立Ti-10.2Mo-4.9Zr-5.5Sn合金的本构模型

经过误差计算

得出该模型的相关系数和平均相对误差分别为0.987 5和4.99%

精度较高。

Abstract

The isothermal compression tests of Ti-10.2 Mo-4.9 Zr-5.5 Sn alloy were tested to understand the hot deformation behavior in range of 670

20 ℃ and strain rate range of 0.001

0 s-1 on a Gleeble-3500 thermo mechanical simulator

and hot deformation activation energy was calculated.The results show that the flow stress is more sensitive to deformation temperature and strain rate

and the flow stress is decreased with the increase of deformation temperature and decrease of strain rate.The deformation activation energy of the alloy is the higher than the self diffusion activation energy of pureαtitanium and pureβtitanium alloy.The constitutive equation of Ti-10.2 Mo-4.9 Zr-5.5 Sn alloy is built up based on multiple linear regression method

where the correlation coefficient and the average relative error are 0.987 5 and 4.99% after an error calculation

showing a high precision.