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Ti55钛合金的热压缩变形及其本构方程
发布人：上海艾荔艾金属材料有限公司www.shailiai.com
更新时间：2015-09-13
采用Gleebe-3800热模拟实验在变形温度900~960 ℃、应变速率为0.001~10 s-1条件下进行Ti55钛合金的热压缩变形实验。
Ti55钛合金的热压缩变形及其本构方程Hot compression deformation and its constitutive equation of Ti55 alloy
采用Gleebe-3800热模拟实验在变形温度900~960 ℃、应变速率为0.001~10 s-1条件下进行Ti55钛合金的热压缩变形实验。结果表明：Ti55钛合金的热压缩真应力—应变曲线表现为流变软化的特点，当变形温度降低或应变速率增加时，Ti55钛合金的流变应力也随之增加。通过对真应力—应变曲线的回归分析，建立了Ti55钛合金的流变应力本构方程，在本研究中的变形温度与应变速率下，Ti55钛合金的Zener-Hollomon参数Z= exp[3.926 7×105/(RT)] =A[sinh(5.107 5×105σ)]4.001 46。
The hot compression deformation behavior of Ti55 alloy was investigated by hot compression testing on Gleeble-3800 thermal simulator at the temperature range of 900-960 ℃ with the strain rate varying from 0.001 s-1to 10 s-1. The results indicate that the true stress—strain curves of Ti55 titanium alloy during hot compression show rheological softening characteristics. The flow stress increases when the deformation temperature decreases or the strain rate increases. Through the true stress—strain curve regression analysis, the flow stress constitutive equations of Ti55 titanium alloy is built and the Zener-Hollomon parameter of this alloy is Z= exp[3.926 7×105/(RT)] =A[sinh(5.107 5×105σ)]4.001 46.
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