一种典型钛合金Ti-Al-Cu-Si的半固态变形  

Semi-Solid Deformation of a Typical Titanium Alloy Ti-Al-Cu-Si

作　　者：郭萍[1] 赵永庆[1] 

机构地区：[1]西北有色金属研究院,陕西西安710016

出　　处：《稀有金属快报》2007年第10期25-29,共5页Rare Metals Letters

基　　金：国家973引导项目(2005CCA06400)

摘　　要：采用Gleeble-3500热模拟实验机对Ti-Al-Cu-Si钛合金在温度为1000￣1200℃之间,应变速率为0.005￣5/s之间,变形程度为40%￣70%的条件下进行了高温热压缩实验研究。分析了实验合金高温变形时流变应力与应变速率、变形温度及变形程度之间的关系以及组织变化,为优化变形加工条件提供依据。实验结果表明:在恒应变速率的条件下,合金的真应力水平随着温度的升高而降低,合金的稳态流变应力随应变速率的增大而减小,随变形程度的增大真应力减小。The stress-strain relation of Ti14 （Ti-Al-Cu-Si） titanium ahoy was investigated. The test was carried out at the temperature range of 1 000-1 200℃, in the strain rate range of 0.005-5.0/s and in the deformation degree range of 40%-70% on hot-simulation machine Gleeble-3500. The relation between true stress and true strain, deformation temperature and deformation degree, and also the the tested alloy were studied during hot compression. The results may lay the foundation for selecting hot deformation conditions of the alloy. The relation between stress and strain is obviously affected by strain rate, deformation temperature and deformation degree. The steady flow stress becomes lower with increase of deformation temperature at constant strain rate, and higher with increase of strain rate at constant temperature, and flow stress become lower with the increase of deformation degree.

关 键 词：Ti-Al-Cu-Si钛合金 半固态变形 组织变化 

分 类 号：TG146.23[一般工业技术—材料科学与工程]