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中文摘要：
在变形温度600℃-800℃、应变速率0．01s-1～0．33s-1条件下进行热态单向拉伸试验，研究Ti-6Al-4V钛合金的变形行为，以及变形性能与变形温度、应变速率之间的关系。结果表明，Ti-6Al-4V钛合金在变形过程中呈现两种变形特征，即稳态形与软化形，且随着变形温度的升高、应变速率的降低，流动应力降低，而延伸率则升高；基于Hooke定律和Grosman方程建立的Ti-6Al-4V钛合金热态成形本构方程，在整个变形区间内可以很好的表征材料的变形行为。
英文摘要：
The hot tensile tests for Ti-6Al-4V alloy were carried out at elevated temperature and different strain rates. The tem- perature was 600℃-800℃, and the strain rate was 0.01s-1 -0.33s -1. The deformation behavior of Ti-6Al-4V alloy was stud- ied, and the relation between deformation properties and temperature, strain rate was also investigated. Results show that two deformation characteristic, steady state flow characteristic and softening flow characteristic, appear during Ti-6Al-4V alloy de- formation process, and with temperature increasing and strain rate decreasing, flow stress reduces, but elongation reverses. Based on Hooke law and Grosman equation, the constitutive equation of Ti-6Al-4V alloy forming at elevated temperature is devel- oped, which can characterize well deformation behavior of Ti-6Al-4V alloy during whole deformation region.
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