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变形近 α 钛合金局部组织不均匀性与局部织构的关联性
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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

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国家科技重大专项(J2019-VI-0005-0119)


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

1.School of Materials Science and Engineering, University of Science and Technology of China, Shenyang 110016, China;2.Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China

Fund Project:

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

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    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。

    Abstract:

    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 αp and 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 αp and β affects the recrystallization of prior β during deformation; it also exerts effects on the morphology of the transformed α phase by variant selection.

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谭海兵,赵子博,杨久旭,刘远宏,王清江,刘建荣,朱绍祥.变形近 α 钛合金局部组织不均匀性与局部织构的关联性[J].稀有金属材料与工程,2022,51(12):4385~4388.[Tan Haibing, Zhao Zibo, Yang Jiuxu, Liu Yuanhong, Wang Qingjiang, Liu Jianrong, Zhu Shaoxiang. Connection Between Local Microstructure Heterogeneity and Local Texture in Deformed Near-α Titanium Alloy[J]. Rare Metal Materials and Engineering,2022,51(12):4385~4388.]
DOI:10.12442/j. issn.1002-185X.20220454

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历史
  • 收稿日期:2022-05-24
  • 最后修改日期:2022-11-28
  • 录用日期:2022-07-21
  • 在线发布日期: 2023-01-11
  • 出版日期: 2022-12-30