Ti26钛合金热压缩变形行为  

Hot Compressive Behavior of Ti26 Titanium Alloy

作　　者：杜宇[1] 赵永庆[1] 戚运莲[1] 奚正平[1] 郭萍[1] 

机构地区：[1]西北有色金属研究院,陕西西安710014

出　　处：《稀有金属材料与工程》2008年第A04期630-633,共4页Rare Metal Materials and Engineering

基　　金：国家自然科学基金重点项目(50434030);国家"973"计划项目(2007CB13805)资助

摘　　要：在Gleeble1500热模拟试验机上对Ti26(Ti-V-Al-Cr-Sn-Nb-Zr系)钛合金进行了恒应变速率压缩变形试验,在温度范围为900～1150℃,应变速率范围为ε=10-3～10s-1,测试了其真应力-应变曲线。β区热压缩、变形的主要软化机制是动态回复,ε≥1s-1时,变形的过程中有动态再结晶现象发生;ε≤10-1s-1时,变形的主要软化机制是动态回复。结合Arrhenius方程并引用Zener-Hollomon参数建立了表征各参数关系的本构方程,求出了Ti26合金的变形激活能。The hot deformation behaviors of Ti26 （Ti-V-Al-Cr-Sn-Nb-Zr） alloy were studied on the Gleeble-1500 heat stimulation machine in the temperature range of 900～1150 ℃ and strain rate range of 0.001～10 s-1. The true stress-strain curves were established. When the specimen is deformed in β phase field, the dynamic recovery dominates the softening mechanism. However, dynamic recrystallization will occur in the range of strain rate 1～10 s^-1. The dynamic recovery dominates the softening mechanism in the range of strain rate 10-3～10-1 s^-1. Constitutive equation was constituted based on Arrhenius equation of temperature-compensated strain rate factor, the Zener-Hollomon parameter, and the deformation activation energy of Ti26 titanium alloy were calculated.

关 键 词：Ti26钛合金 热压缩 变形软化机制 变形激活能 本构方程 

分 类 号：TG146.23[一般工业技术—材料科学与工程]