有色金属科学与工程2024，Vol.15Issue(1)：58-66,9.DOI:10.13264/j.cnki.ysjskx.2024.01.008
TC11钛合金动态回复与动态再结晶高温本构模型研究
Study on high-temperature constitutive model of TC11 titanium alloy dynamic recovery and dynamic recrystallization
摘要
Abstract
Gleeble-1500 thermal simulation testing machine was used to perform an isothermal constant strain rate uniaxial compression test for TC11 titanium alloy under a deformation temperature of 900～1 050℃ and strain rate of 0.1～10 s-1.The microstructure observation results show that a significant dynamic recrystallization phenomenon occurs in TC11 titanium alloy during the thermal deformation process.Under the deformation temperatures of 900℃ and 950℃ ,the recrystallization grain size first increases and then decreases with increasing strain rate.Furthermore,as the deformation temperature reaches 1 000℃ and 1 050℃ ,the content of the α phase significantly decreases,and the microstructure evolution is dominated by dynamic recrystallization,accompanied by obvious grain refinement.To study the effect of the dynamic recrystallization phenomenon on rheological behavior,a high-temperature constitutive model of flow stress based on dynamic recovery and dynamic recrystallization was constructed in combination with the K-M dislocation density model and dynamic recrystallization fraction model.By comparing the prediction results of the constitutive model with the test data,the correlation coefficient and average relative error are 0.989 and 6.53% ,respectively,which suggests that the constructed flow stress model with dynamic recovery and dynamic recrystallization can accurately predict the flow stress of TC11 titanium alloy under thermal deformation.关键词
TC11钛合金/动态回复/动态再结晶/高温本构模型/K-M位错密度模型Key words
TC11 titanium alloy/dynamic recovery/dynamic recrystallization/high-temperature constitutive model/K-M dislocation density model分类
矿业与冶金引用本文复制引用
朱宁远,陈秋明,陈世豪,左寿彬..TC11钛合金动态回复与动态再结晶高温本构模型研究[J].有色金属科学与工程,2024,15(1):58-66,9.基金项目
国家自然科学基金资助项目(51905241) （51905241）
江西省自然科学基金资助项目(20202BABL214033) （20202BABL214033）
