首页> 中文期刊> 《中国有色金属学报(英文版)》 >IMI834钛合金在热拉伸变形过程的流变行为建模

IMI834钛合金在热拉伸变形过程的流变行为建模

         

摘要

A proper constitutive model was developed to predict the hot tensile flow behavior of IMI834 titanium alloy inα+β region. Hot tensile tests were performed at 800−1025 °C and 0.001−0.1 s−1. The constitutive model was developed through an Arrhenius-type equation at strains of 0.08−0.22 to characterize the hot tension behavior. It was found that the activation energies for hot tensile deformation of IMI834 titanium alloy are in the range of 519−557 kJ/mol at different strain values. The accuracy of predicted flow stress curves was evaluated using standard statistical parameters. These curves are appropriately found to be in good agreement with the experimental ones.%建立合适的本构模型预测IMI834钛合金在α+β区的热拉伸流变行为。热拉伸实验在温度为800~1025°C、应变速率为0.001~0.1 s−1条件下进行。此本构模型通过Arrhenius型方程来表征应变为0.08~0.22时合金的热拉伸行为。结果表明,在不同应变条件下IMI834钛合金的热拉伸变形激活能范围为519~557 kJ/mol。利用标准统计参数估算预测合金流变应力曲线的精度。所预测的合金的流变应力曲线与实验结果十分吻合。

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