TC21钛合金热压缩工艺数值模拟与实验研究  

Numerical simulation and experimental study on hot compression process of TC21 titanium alloy

作　　者：陶成 崔霞[1] 欧阳德来[1] 万兴才 谢有美 刘林涛 姜建飞 TAO Cheng;CUI Xia;OUYANG De-lai;WAN Xing-cai;XIE You-mei;LIU Lin-tao;JIANG Jian-fei(School of Materials Science and Engineering,Nanchang Hangkong University,Nanchang 330063,China)

机构地区：[1]南昌航空大学材料科学与工程学院,江西南昌330063

出　　处：《塑性工程学报》2023年第8期195-201,共7页Journal of Plasticity Engineering

基　　金：国家自然科学基金资助项目(51761029,51864035);江西省自然科学基金资助项目(20224BAB204013)。

摘　　要：对TC21钛合金在两相区进行了不同变形温度(830~920℃)和应变速率(0.01~1 s^(-1))下的热压缩实验,利用金相法和DEFORM-3D有限元模拟软件对合金在上述热变形条件下的热压缩过程进行了数值模拟研究。实验结果表明,随着变形温度的上升和应变速率的下降,合金α片层组织的球化体积分数不断增加。模拟结果表明,随着变形温度的上升和应变速率的下降,合金的等效应变和α片层组织的再结晶体积分数不断提高,等效应变和再结晶体积分数的最大都发生在合金的中心部位。当应变速率为0.1 s^(-1)、变形温度为920℃时,模拟获得的再结晶体积分数为40%,模拟结果和实验结果呈现较高的吻合度。将有限元模拟和热变形参数边界条件相结合,能够优化外部工艺条件。Hot compression experiments of TC21 titanium alloy were carried out at different deformation temperatures(830-920℃)and strain rates(0.01-1 s^(-1))in the two-phase region.The hot compression process of alloy under the above hot deformation conditions was numerically simulated by metallographic method and DEFORM-3D finite element simulation software.The experiment results show that with the increase of deformation temperature and the decrease of strain rate,the spheroidization volume fraction of α lamellar microstructure of alloy increases constantly.The simulation results show that with the increase of deformation temperature and the decrease of strain rate,the equivalent strain of alloy and the recrystallization volume fraction ofαlamellar microstructure increase constantly and the maximum values of the equivalent strain and the recrystallization volume fraction occur at the center of the alloy.When the strain rate is 0.1 s^(-1) and the deformation temperature is 920℃,the simulated recrystallization volume fraction is 40%,and the simulated results are in good agreement with the experimental results.The external process conditions can be optimized by combining finite element simulation with boundary conditions of hot deformation parameters.

关 键 词：热压缩实验 数值模拟 α片层组织球化 

分 类 号：TG306[金属学及工艺—金属压力加工]