TB6钛合金热压缩及织构演变模拟  

Simulation of thermal compression and texture evolution of TB6 titanium alloy

作　　者：莫洪生 崔霞[1] 朱恩锐 欧阳德来[1] 杨超 Mo Hongsheng;Cui Xia;Zhu Enrui;Ouyang Delai;Yang Chao(School of Materials Science and Engineering,Nanchang Hangkong University,Nanchang Jiangxi 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：《金属热处理》2024年第7期29-37,共9页Heat Treatment of Metals

基　　金：江西省自然科学基金(20224BAB20413)。

摘　　要：利用Thermecmaster-Z型热模拟试验机研究了TB6钛合金在不同变形条件下的热变形行为(变形温度为1173~1323 K,应变速率为0.001~1 s^(-1)),运用有限元仿真软件模拟热压缩过程,并对不同变形条件下的应力和应变分布进行了分析。结果表明,数值模拟的应力-应变曲线与试验结果一致。同时,对有限元软件进行了二次开发,模拟出了压缩后合金的ODF图,与实测ODF图具有较高的吻合度。等效应力和等效应变分布不均,最大应力和最大应变均发生在试样中心位置,应力和应变随着变形温度的降低或应变速率的提高而增大。热压缩后该合金的主要织构为R-Cube_(ND){001}<110>织构和Cube{001}<100>织构,并且具有一定的遗传性,升高变形温度或增大应变速率可强化主要织构。Thermal deformation behavior of TB6 titanium alloy under different deformation conditions(deformation temperature of 1173-1323 K,strain rate of 0.001-1 s^(-1))was studied by means of Thermecmaster-Z thermal simulator.Hot compression process was stimulated by finite element simulation software,and stress and strain distribution under different deformation conditions was analyzed.The results show that stress-strain curves obtained by numerical simulation is consistent with the experimental values.Finite element software is conducted secondary development and the ODF diagram of the compressed alloy is simulated,which has a high degree of agreement with the measured ODF diagram.The distribution of equivalent stress and equivalent strain is uneven,and the maximum stress and maximum strain occur at the center of the specimen.The stress and strain increase with the decrease of deformation temperature or the increase of strain rate.After hot compression,the main texture of the alloy is R-Cube_(ND){001}<110>texture and Cube{001}<100>texture,and it has a certain degree of heritability.Increasing the deformation temperature or strain rate can strengthen the main texture.

关 键 词：TB6钛合金 数值模拟 织构演变 热变形 

分 类 号：TG146.23[一般工业技术—材料科学与工程]