等温锻造过程中Ti-1023合金的本构关系  

Constitutive Relationship of Ti-1023 Alloy during Isothermal Forging Processes

作　　者：闫世成[1] 刘东[1] 杨艳慧[1] 郭鸿镇[1] 罗子健[1] 

机构地区：[1]西北工业大学材料学院,陕西西安710072

出　　处：《热加工工艺》2005年第6期1-3,共3页Hot Working Technology

基　　金：航空基金资助项目(02H53062);总装"十五"预研项目

摘　　要：采用Thermecmaster-Z型热加工模拟实验机对Ti-1023合金进行了等温恒应变速率压缩试验,变形温度范围为:740～820℃;变形速率为:0.001～1s-1.在对试验数据进行系统分析的基础上,全面揭示了Ti-1023合金在等温锻造条件下的热态变形行为.分析了锻造热力参数对流动应力的影响,提出了以Zener-Hollomn参数表征的Ti-1023合金本构方程.并初步分析了Ti-1023合金等温锻造过程中显微组织演化规律.根据分析结果,Ti-1023合金等温锻造宜在略低于相变点温度下以相对高的变形速率进行.Isothermal constant strain rate compression tests of Ti-1023 all oy were carried out by using thermecmaster-Z hot simulater. The range of test parameters were as follow:temperature 740~820℃; strain rate 0.001~1s-1. Based o n the systemic analysis of experimental data, the hot deformation behavior of Ti -1023 alloy under isothermal forging condition was explored . The effect of ther malmechanical parameters on flow stress was analyzed. A constitutive relationshi p of Ti-1023 alloy described by Zener-Hollomn parameter was formulated. The mi crostructure evolution during the isothermal forging process was discussed. Acc ording to the results, it is proposed to perform isothermal forging process of T i-1023 alloy at the relative high strain rate and under the temperature closed to phase transition point.

关 键 词：TI-1023合金 等温锻造 本构关系 组织演化规律 

分 类 号：TG146.2[一般工业技术—材料科学与工程] TG319[金属学及工艺—金属材料]