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HCP结构TiZrHf中熵合金变形行为的准原位EBSD研究
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1.西安交通大学;2.金属材料强度国家重点实验室

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国家自然科学基金资助(51801147,51790482)


Quasi-In-Situ EBSD Study On The Deformation Behavior Of TiZrHf Medium Entropy Alloys With HCP Structure
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    摘要:

    使用真空电弧炉熔炼出TiZrHf中熵合金和纯Ti,利用冷轧及退火得到再结晶后的等轴晶粒,并采用 X射线衍射方法研究其相组成;使用扫描电镜和EBSD对TiZrHf合金和纯Ti组织进行表征并进行滑移迹线分析。结果表明: TiZrHf合金与纯Ti都为单相HCP结构且轴比接近,经再结晶后织构类型都为基面织构。在室温下沿RD拉伸变形10%时,TiZrHf合金的锥面滑移开动比例为26%,接近纯Ti中锥面滑移晶粒占比的两倍,且生成{10-12}拉伸孪晶的数量明显多于纯Ti。

    Abstract:

    : TiZrHf medium entropy alloy and pure Ti were prepared in vacuum arc furnace. The equiaxed grains were obtained by cold rolling and annealing, and their phase composition was studied by X-ray diffraction. Scanning electron microscope and Electron back scattered diffraction was performed to study the microstructure and in-grain slip activities of TiZrHf alloy and pure Ti. The results show that both TiZrHf alloy and pure Ti are single-phase HCP structure with approximately the same axial ratio, and their texture are basal texture after recrystallization. The pyramidal slip of TiZrHf alloy occupy a high fraction of~26% at 10% tensile strain along RD, which is twice the proportion of pyramidal slip in pure Ti, and the number of {10-12} tensile twins is significantly more than that of pure Ti.

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张玉晴,张东东,匡杰,易萌,刘刚,孙军. HCP结构TiZrHf中熵合金变形行为的准原位EBSD研究[J].稀有金属材料与工程,2023,52(2):719~727.[Zhangyuqing, Zhang Dongdong, Kuang Jie, Yi Meng, Liu Gang, Sun Jun. Quasi-In-Situ EBSD Study On The Deformation Behavior Of TiZrHf Medium Entropy Alloys With HCP Structure[J]. Rare Metal Materials and Engineering,2023,52(2):719~727.]
DOI:10.12442/j. issn.1002-185X.20220069

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历史
  • 收稿日期:2022-01-22
  • 最后修改日期:2022-04-02
  • 录用日期:2022-04-25
  • 在线发布日期: 2023-03-09
  • 出版日期: 2023-02-28