变形近α钛合金局部组织不均匀性与局部织构的关联性  

Connection Between Local Microstructure Heterogeneity and Local Texture in Deformed Near-α Titanium Alloy

作　　者：谭海兵 赵子博[2] 杨久旭 刘远宏 王清江[2] 刘建荣[2] 朱绍祥[2] Tan Haibing;Zhao Zibo;Yang Jiuxu;Liu Yuanhong;Wang Qingjiang;Liu Jianrong;Zhu Shaoxiang(School of Materials Science and Engineering,University of Science and Technology of China,Shenyang 110016,China;Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China)

机构地区：[1]中国科学技术大学材料科学与工程学院,辽宁沈阳110016 [2]中国科学院金属研究所,辽宁沈阳110016

出　　处：《稀有金属材料与工程》2022年第12期4385-4388,共4页Rare Metal Materials and Engineering

基　　金：National Science and Technology Major Project(J2019-Ⅵ-0005-0119);Youth Innovation Promotion Association CAS(2020193)。

摘　　要：一种具有双态组织的近α钛合金经压缩变形后微观组织呈现出不均匀性。利用电子背散射衍射技术分析了局部织构对组织形貌的影响,通过取向数据处理研究了初生α相(αp)和β相微织构。结果表明,局部组织不均匀性和局部织构之间具有紧密联系。引入角θ定量分析αp相与相邻β相偏离Burgers取向关系程度,发现在具有粗大β晶粒的区域内具有较小θ角的αp/β界面体积分数高于完全再结晶的β晶粒区域。αp相和β相之间的取向关系不仅影响原始β晶粒变形过程中再结晶,还通过影响变体选择对转变α相形貌产生影响。A heterogeneous microstructure was found in a compressed near-α titanium alloy with a bimodal microstructure. The effect of the local texture on microstructural morphology was analyzed by electron backscattering diffraction techniques. Advanced orientation data processing was performed to study the micro-texture of primary α(αp) and β. The results show that there is a close relationship between local microstructure heterogeneity and local texture. The deviation angle θ can be used to quantitatively evaluate the orientation relationship(OR) between αpand the surrounding β grains from Burgers OR. The fractions of the αp/β boundary with small θ are always higher in the regions where coarse β grains exist than in the regions where the β grain is completely recrystallized. The orientation relationship between αpand β affects the recrystallization of prior β during deformation;it also exerts effects on the morphology of the transformed α phase by variant selection.

关 键 词：钛合金 电子背散射衍射 局部织构 再结晶 微观组织 

分 类 号：TG146.23[一般工业技术—材料科学与工程]