等轴态TC4钛合金热加工性能及本构关系研究  

Research on Hot Deforming Condition and Constitutive Relationship on Equiaxed TC4 Alloy

作　　者：杨明[1,2] 梁益龙[1,2] 钟应[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：《热加工工艺》2013年第22期44-46,50,共4页Hot Working Technology

基　　金：贵阳市科技攻关项目资助(2010筑科Ⅰ合同字第1-70号);遵义钢绳股份有限公司校企合作项目

摘　　要：探索了TC4钛合金组织形貌与力学性能的关系,并通过热模拟试验,对TC4钛合金在中低温区（500～800℃）,在不同应变速率下进行热变形研究。通过对真应力-真应变分曲线的分析,探索了相应软化机制,确定了低温区的热变形激活能,建立了流变应力本构关系。研究了峰值应力与温度和变形速率之间的函数关系,为TC4钛合金棒丝材的加工控制提供理论基础。The interrelationship of microstructure and mechanical property of TC4 alloy was investigated. The thermal simulation experiment under medium temperature region （500-800℃） at different strain rate was performed. By analyzing true stress-true strain curves, the softening mechanism, the flow stress constitutive equation, functional relationship of top stress, temperature and strain rate of TC4 alloy was established. The hot deformation activation energy was determined, which can provide a theoretical support for the process of bar and wireofTC4 alloy.

关 键 词：TC4钛合金 等轴组织 热模拟 本构关系 

分 类 号：TG359[金属学及工艺—金属压力加工]