CAJ | 학술논문

目的：研究变形温度、应变速率等热力参数对 TC21钛合金流动应力的影响规律，并构建出TC21钛合金本构方程。方法在热模拟试验机上对 TC21钛合金进行了等温恒应变速率压缩实验，分析其真应力-真应变曲线。结果获得了该合金在变形温度范围为760~920益、应变速率范围为0.001~10 s-1的流动应力数据，采用多元线性回归法建立了该合金的本构方程。结论误差分析表明，该本构方程具有较高精度，可为 TC21钛合金锻造过程中的数值模拟和锻造热力参数的合理制定提供理论依据。
목적：연구변형온도、응변속솔등열력삼수대 TC21태합금류동응력적영향규률，병구건출TC21태합금본구방정。방법재열모의시험궤상대 TC21태합금진행료등온항응변속솔압축실험，분석기진응력-진응변곡선。결과획득료해합금재변형온도범위위760~920익、응변속솔범위위0.001~10 s-1적류동응력수거，채용다원선성회귀법건립료해합금적본구방정。결론오차분석표명，해본구방정구유교고정도，가위 TC21태합금단조과정중적수치모의화단조열력삼수적합리제정제공이론의거。
Objective To study the influence of thermomechanical parameters such as deformation temperature and strain rate on the flow stress of titanium alloy TC21 and to construct the constitutive equation of titanium alloy TC21. Meth-ods Isothermal constant strain rate compression experiment of titanium alloy TC21 was carried out with a hot working simu-lator, and the true stress-strain curves were analyzed. Results The flow stress data of the alloy in the temperature range of 760 ~ 920 ℃ and the strain rate range of 0. 001 ~ 10 s-1 were obtained, and the constitutive equation of the titanium alloy was constructed by Multiple Linear Regression. Conclusion Error analysis showed that the constitutive equation had high precision, which could provide theoretical basis for numerical simulation and determination of the reasonable thermome-chanical parameters during the forging process of titanium alloy TC21.