钛合金Ti-6Al-4V热变形中的动态再结晶研究  

Dynamic Recrystallization of Ti-6Al-4V During Hot Deformation

作　　者：刘丽娟[1,2] 吕明[2] 武文革[1] 

机构地区：[1]中北大学机械工程与自动化学院,山西太原030051 [2]太原理工大学机械工程学院,山西太原030024

出　　处：《热加工工艺》2014年第24期1-6,共6页Hot Working Technology

基　　金：国家自然科学基金资助项目(50975191);山西省回国留学人员科研资助项目(2013-086)

摘　　要：钛合金Ti-6Al-4V等温恒应变速率压缩试验采用Gleeble3800热加工模拟试验机进行,材料变形温度815～1100℃。结果表明,无论在琢＋茁相区还是茁相区,试验材料均有发生动态再结晶的可能性;对动态再结晶的影响因素进行了分析,利用上述结果建立了试验材料的Arrhenius方程及动态再结晶晶粒尺寸计算式。对不同条件下试验材料的组织形貌进行了研究,表明对材料发生动态再结晶影响最大的因素为变形温度。The isothermal constant strain rate compression experiment of Ti-6Al-4V alloy was conducted on Gleeble 3800 hot-simulator at deformation temperature ranging from 815℃ to 955 ℃. The results show that titanium alloy Ti-6Al-4V has the possibility of dynamic recrystallization in α＋β phase and β phase.The influence factors of dynamic recrystallization was studied. The Arrhenius equation of experimental materials and the calculation formula of the dynamic recrystallization was established based on the above results and grain size. The different tissue morphology was studied under different condition. It can be obtained that the greatest influencing factor on the appearance of material dynamic recrystallization is deformation temperature.

关 键 词：动态再结晶 本构模型 TI-6AL-4V 

分 类 号：TG113.2[金属学及工艺—物理冶金]