变形态Ti40合金的高温流变应力模型研究  

Study on flow stress model of deformed Ti40 alloy at high temperature

作　　者：王方[1] 李鑫[1] 鲁世强[2] 王克鲁[1] 黄旭[3] 曹京霞[3] 

机构地区：[1]南昌航空大学航空制造工程学院,江西南昌330063 [2]南昌航空大学材料科学与工程学院,江西南昌330063 [3]北京航空材料研究院,北京100095

出　　处：《锻压技术》2012年第2期134-138,共5页Forging & Stamping Technology

基　　金：国家自然科学基金资助项目(51005112);航空科学基金资助项目(2010ZF56019);江西省教育厅青年科学基金资助项目(GJJ11156);轻合金加工科学和技术国防重点学科实验室开放基金资助项目(gf200901008)

摘　　要：利用变形态Ti40合金在变形温度范围为1223～1323K和应变速率范围为0.001～1.0s-1的不同应变下的热压缩实验数据研究了该材料的高温流变应力模型。利用实验数据分析了Arrhenius型方程对变形态Ti40合金的适用性,结果表明,采用双曲正弦型Arrhenius方程建立该材料的高温流变应力模型是适宜的,并通过对双曲正弦方程进行温度补偿及引入路径变量因子改进了模型。通过计算复相关系数和平均相对误差绝对值对该模型进行误差分析,经过改进的变形态Ti40合金的高温流变应力模型具有良好的精度。The experimental data obtained in hot compression tests that conducted in the temperature range of 1223 - 1373 K and strain rate of 0. 001 - 1.0 s-1 were used to study the flow stress model of deformed Ti40 alloy. By using experimental data, the applicability of Arrhenius equation to deformed Ti40 alloy was analyzed and it could be found that employing hyperbolic sine Arrhenius equation to construct flow stress model of deformed Ti40 alloy was suitable, furthermore, temperature compensation and path variables were introduced to improve the flow stress model Error analysis of the model was estimated by the values of multiple correlation coefficient and average absolute relative error, and the results show that the improved flow stress model of deformed Ti40 alloy has a high accurate.

关 键 词：变形态Ti40合金 流变应力模型 Arrhenius型方程 温度补偿 

分 类 号：TG146.23[一般工业技术—材料科学与工程]