Ta掺杂对γ-TiAl基合金块状组织和力学性能的影响

张可人; 张乐乐; 潘恒沛; 陈洁明; 赵惠

Ta掺杂对γ-TiAl基合金块状组织和力学性能的影响

1. 西安石油大学材料科学与工程学院, 陕西西安 710065;
2. 中国船舶集团有限公司第七二五研究所, 河南洛阳 471023

基金项目:

陕西省教育厅科研计划项目(No.21JC027)

陕西省自然科学基础研究计划项目(No.2021JM-403、No.2022JQ-359)

详细信息

作者简介:
张可人,女,1990年生,博士,讲师,研究方向为先进钛合金改性行为。

中图分类号: TG146
计量
- 文章访问数: 61
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- 被引次数: 0
出版历程
- 收稿日期: 2022-09-06
- 网络出版日期: 2023-01-12

Influence of Ta Doping on Microstructure and Mechanical Properties of γ-TiAl Based Alloy

1. School of Materials Science and Engineering, Xa'an Shiyou University, Xi'an 710065, China;
2. Luoyang Ship Material Research Institute, Luoyang 471023, China

摘要

摘要: 研究了Ti-48Al-2Nb-2Cr-xTa(x=0,1.0,2.0)(原子分数,%)合金α单相区淬火,块状组织(γ_m相)的演变规律,采用EBSD(电子背散射衍射)技术对晶粒取向进行表征。结果表明,在快速冷却条件下,微量Ta元素的添加能够促进γ_m相的析出,促进(体积分数大于50%)或者抑制(体积分数小于50%)γ_m相析出的Ta元素临界含量为2 %(原子分数)。Ta元素能够细化γ_m相亚颗粒,同时,不同种类γ_m变体可直接在α₂晶粒内以BOR形核,在生长过程中发生了沿着{111}γ密排面的变体选择,使得第二代γ_m变体偏离BOR。
- 金属间化合物 /
- γ_m相 /
- Ta /
- 形核 /
- 生长
Abstract: The evolution behavior of massive γ (γ_m) quenching from single α-phase region in Ti-48Al-2Nb-2Cr-xTa (x=0, 1.0, 2.0) alloy is systematically studied. The electron back scattering diffraction method is used to character the grain orientation. The precipitation of γ_m phase can be greatly promoted by Ta element. The critical content of Ta, promoting or inhibiting the precipitation of γ_m, is 2% (atom fraction). Ta element can refine the γ_m subgrains, and the various γ_m variants can directly nucleate inside the α₂ grains in the form of BOR. In the course of growth, the γ_m nuclei selects its variant over the close-packed {111}γ plane, making the γ_m nuclei deviating from BOR.
- intermetallic compound /
- γ_m phase /
- Ta /
- nucleate /
- growth

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