退火态TC4钛合金热变形本构关系的研究  

Constitutive relation of hot deforming for annealed TC4 titanium alloy

作　　者：钟应[1,2] 梁益龙[1,2] 杨明[1,2] 

机构地区：[1]贵州大学材料与冶金学院,贵州贵阳550025 [2]贵州省材料结构与强度重点实验室,贵州贵阳550025

出　　处：《兵器材料科学与工程》2013年第3期86-89,共4页Ordnance Material Science and Engineering

基　　金：TC4钛合金棒丝材连续拉拔工艺研发(2010筑科Ⅰ合同字第1-70号);黔科合GZ字[2011]3001;遵义钢绳股份有限公司校企合作项目

摘　　要：利用Gleeble-3800热模拟机对TC4钛合金在550~800℃温区进行热变形试验研究。通过真应力、真应变分析得到TC4钛合金峰值应力随温度升高而降低、应变速率增大而升高,确定了550~800℃温区热变形激活能、建立了流变应力本构关系以及峰值应力与温度和变形速率之间的函数关系。通过热变形模拟为TC4钛合金热加工参数的合理制定与控制提供依据。The hot deformation tests were carried out by Gleeble 3800 thermal simulator on TC4 titanium alloy at deformation temperature 550 to 800 ℃. The analysis of stress strain curves of TC4 titanium alloy shows that the peak stress increases with decreasing the deformation temperature and increasing the strain rate. The hot deformation activation energy for temperature 550 to 800 ℃,constitutive relation,the relation between peak stress and deformation temperature and strain rate are obtained for annealed TC4 titanium alloy. Thermal deformation simulation can provide basis for choosing hot working parameters of TC4 titanium alloy.

关 键 词：TC4钛合金 流变应力 变形激活能 热变形方程 

分 类 号：TG146.2[一般工业技术—材料科学与工程]