TC21合金基于不同失稳判据的热加工图研究  

Study on Processing Map Under Different Instability Criterion for TC21 Alloy

作　　者：符君 于雪梅 刘超[2] 周舸 FU Jun;YU Xuemei;LI Chao;ZHOU Ge(93107 Unit of PLA,Shenyang 110141,China;School of Materials Science and Engineering,Shenyang University of Technology,Shenyang 110870,China)

机构地区：[1]中国人民解放军93107部队,沈阳110141 [2]沈阳工业大学材料科学与工程学院,沈阳110870

出　　处：《航空制造技术》2019年第19期65-74,共10页Aeronautical Manufacturing Technology

基　　金：辽宁省教育厅项目(LQGD2017024)

摘　　要：利用Gleeble-3800热压缩模拟试验机,对TC21合金在830~1010℃、0.0005~10s-1条件下进行了热压缩试验。以试验数据为基础,以Arrhenius热变形本构关系模型推导、不同失稳判据下的热加工图的构建为研究主线,获得了该合金不同热变形工艺参数下的本构关系模型和不同失稳判据(Gegel、Malas、Prasad、Murty、Semiatin失稳判据)下的热加工图,并对上述5种失稳判据的理论依据及预测结果进行了分析。应用热加工图理论并结合微观组织,预测了该合金的适合成形加工区和流变失稳区,为TC21合金热加工工艺参数进行了科学合理的优化。TC21 alloy was carried out on Gleeble-3800 thermal compression simulation tester at temperatures and strain rates ranging of 830-1010℃and 0.0005-10s-1.Based on the compressed experimental data,taking the hot deformation constitutive relation model derivation of Arrhenius and the hot processing map construction under different instability criterion as the main line of the study,the constitutive model under different hot deformation parameters and the hot processing map under different instability criterion(Gegel,Malas,Prasad,Murty,Semiatin)were obtained.Then,the theoretical basis and prediction results of above five instability criterion were analyzed.By using the theory of hot processing map combining with microstructure,the suitable forming and flowing instability areas were predicted,and hot working processing parameters of TC21 alloy are optimized scientifically and rationally.

关 键 词：TC21合金 热压缩模拟试验 流变失稳判据 热加工图 本构方程 

分 类 号：TG1[金属学及工艺—金属学]