双态组织Ti80合金的动态再结晶行为  

Dynamic Recrystallization Behavior of Ti80 Alloy with Bimodal Structure

作　　者：鲁龙龙 张彦敏[1,2] 权思佳 李闪光 李炎 吴宇坤[4] 宋克兴 Lu Longlong;Zhang Yanmin;Quan Sijia;Li Shanguang;Li Yan;Wu Yukun;Song Kexing(Henan University of Science and Technology,Luoyang 471023,China;Collaborative Innovation Center of Nonferrous Metals Henan Province,Luoyang 471023,China;Luoyang Bearing Research Institute,Luoyang 471039,China;Luoyang Ship Material Research Institute,Luoyang 471039,China;Henan Province Key Laboratory of Nonferrous Materials Science and Processing Technology,Luoyang 471023,China)

机构地区：[1]河南科技大学,河南洛阳471023 [2]有色金属共性技术河南省协同创新中心,河南洛阳471023 [3]洛阳轴承研究所,河南洛阳471039 [4]中国船舶重工集团公司第七二五研究所,河南洛阳471039 [5]河南省有色金属材料科学与加工技术重点实验室,河南洛阳471023

出　　处：《稀有金属材料与工程》2021年第8期2979-2985,共7页Rare Metal Materials and Engineering

基　　金：河南省杰出人才创新基金(182101510003);河南省重点攻关项目(20174GJPT1)。

摘　　要：采用Gleeble-1500热模拟试验机对双态组织的Ti80合金在变形温度为860~980℃、应变速率为0.01~1 s^(-1)的变形条件下进行了等温热压缩实验,研究了合金的热变形行为,利用加工硬化率确定了不同变形条件下动态再结晶临界应变。结果表明,动态再结晶是Ti80合金热变形过程中的重要软化机制,并发现动态再结晶临界应变随温度的升高和应变速率的降低而减小。基于Z参数和改进后的Avrami方程,构建了Ti80合金动态再结晶临界应变与动力学模型。The thermal compression tests of Ti80 alloy with bimodal microstructure was conducted at the deformation temperature of 860~980℃and the strain rate of 0.01~1 s^(-1)on the Gleeble-1500 thermal-mechanical simulator.The flow stress and dynamic recrystallization behavior of the alloy during hot deformation were investigated,and the critical strain of dynamic recrystallization was determined with the help of the work hardening rate.The results show that dynamic recrystallization is an important softening mechanism during hot deformation of Ti80 alloy,and the critical strain of dynamic recrystallization decreases with increasing temperature and decreasing strain rate.Based on the Z parameter and the improved Avrami equation,the critical strain and kinetics model for dynamic recrystallization of Ti80 alloy were constructed.

关 键 词：Ti80合金 动态再结晶 临界应变 动力学 

分 类 号：TG146.23[一般工业技术—材料科学与工程]