Ti-5553合金高温变形时动态再结晶行为  

The Dynamic Recrystallization Behavior of Ti-5553 Titanium Alloy during Hot Deformation

作　　者：周伟[1] 葛鹏[1] 赵永庆[1] 杨义[1] 冯亮[1] 李倩[1] 

机构地区：[1]西北有色金属研究院,陕西西安710016

出　　处：《稀有金属材料与工程》2012年第8期1381-1384,共4页Rare Metal Materials and Engineering

基　　金：国家重点基础研究发展计划项目(2007CB613805)

摘　　要：采用热压缩试验方法,对Ti-5553钛合金的动态再结晶行为进行研究。结果表明,在温度800～860℃、应变速率0.01～10s-1的范围内,Ti-5553合金在高温、低应变速率变形时,晶界弓出形核是其主要的动态再结晶形核机制;在低温、高应变速率、大变形量变形时,位错塞积形核是主要的动态再结晶形核机制。在非均匀变形的条件下材料产生绝热剪切现象,其形核主要以亚晶吞并长大形核机制进行。The dynamic recrystallization behavior of Ti-5553 titanium alloy was researched by hot compression test.Compression tests were carried out on a Gleeble-1500 thermal simulation testing machine in the temperature range of 800～860 ℃,at strain rate range of 0.1-10 s-1.The results show that initial grain boundary bulging nucleation is the main nucleation of dynamic recrystallization mechanism at high temperature and low strain rate.Dislocation nucleation is the main mechanism of dynamic recrystallization nucleation at low temperature,high strain rate and large deformation.In the non-uniform deformation,adiabatic shear phenomenon is funded.Subgrain nucleation growth is the main nucleation mechanism of dynamic recrystallization.

关 键 词：钛合金 动态再结晶 形核 

分 类 号：TG146.23[一般工业技术—材料科学与工程]