Ti-6Al-4V合金的温轧织构演变  

Texture Evolution in Warm Rolled Ti-6Al-4V Alloy

作　　者：杨换平 王耀勉[1] 李治阳 Yang Huanping Wang Yaomian Li Zhiyang(Xi＇an University of Architecture and Technology, Xi＇an 710055, China)

机构地区：[1]西安建筑科技大学,陕西西安710055

出　　处：《稀有金属材料与工程》2017年第9期2655-2660,共6页Rare Metal Materials and Engineering

基　　金：陕西省科技厅科技项目(2014JQ6211)

摘　　要：本研究采用取向分布函数(ODF)详细分析了具有等轴组织的Ti-6Al-4V热轧退火板在450、600和750℃下经过约45%的温轧压下量后沿层厚的宏观织构演变。结果表明采用多道次温轧的方法成功获得可改善Ti-6Al-4V合金力学性能各向异性的纤维织构ND//<hkil>和基面织构(0001)[2110]或(0001)[1210]。而且,轧板通体上均形成了ND//<hkil>纤维织构,中心层的横向织构(1210)[1010]随轧制温度而变化,表层的基面织构通过位错滑移累积剪切应变而产生,且基面织构的形成路径依赖于初始取向。Ti-6Al-4V hot-rolled and annealed sheet was warm rolled to about 45% reduction at temperatures of 450,600 and 750 °C,and then through-thickness macrotexture evolution was analyzed using orientation distribution function（ODF）. The results show that the ND//hkil fiber texture and the basal texture（0001）[2 1 1 0] or（0001）[2 1 1 0],which can improve the mechanical property anisotropy of Ti-6Al-4V alloy,can be obtained by multipass warm rolling. Moreover,the ND//hkil fiber texture is developed in the bulk sheet,and the transverse texture（ 1 2 1 0）[10 1 0] in the center layer varies with rolling temperature,whereas the basal texture in the surface layer is formed by accumulated shear strain from dislocation slip and its formation route depends on initial orientation.

关 键 词：TI-6AL-4V合金 织构 取向分布函数(ODF) 温轧 

分 类 号：TG339[金属学及工艺—金属压力加工] TG146.23[一般工业技术—材料科学与工程]