Ti2AlNb基合金中的组织转变及其动力学研究进展

程剑文 饶群力 李金富 姚婷婷

程剑文, 饶群力, 李金富, 姚婷婷. Ti2AlNb基合金中的组织转变及其动力学研究进展[J]. 航空材料学报, 2022, 42(6): 1-8. doi: 10.11868/j.issn.1005-5053.2022.000080
引用本文: 程剑文, 饶群力, 李金富, 姚婷婷. Ti2AlNb基合金中的组织转变及其动力学研究进展[J]. 航空材料学报, 2022, 42(6): 1-8. doi: 10.11868/j.issn.1005-5053.2022.000080
CHENG Jianwen, RAO Qunli, LI Jinfu, YAO Tingting. Research progress of microstructure transformation and kinetics in Ti2AlNb-based alloy[J]. Journal of Aeronautical Materials, 2022, 42(6): 1-8. doi: 10.11868/j.issn.1005-5053.2022.000080
Citation: CHENG Jianwen, RAO Qunli, LI Jinfu, YAO Tingting. Research progress of microstructure transformation and kinetics in Ti2AlNb-based alloy[J]. Journal of Aeronautical Materials, 2022, 42(6): 1-8. doi: 10.11868/j.issn.1005-5053.2022.000080

Ti2AlNb基合金中的组织转变及其动力学研究进展

doi: 10.11868/j.issn.1005-5053.2022.000080
基金项目: 国家科技重大专项项目(2017-VI-0004-0075)
详细信息
    通讯作者:

    饶群力(1967—),男,博士,研究员,研究方向为材料结构表征,联系地址:上海市闵行区东川路800号上海交通大学分析测试中心(200240),E-mail:qlrao@sjtu.edu.cn

  • 中图分类号: TG166

Research progress of microstructure transformation and kinetics in Ti2AlNb-based alloy

  • 摘要: 起源于钛合金的Ti2AlNb基合金作为一种新型高温结构材料,具有优秀的室温韧性、抗裂性能、高温强度及抗氧化性,在航空航天领域呈现出广阔的应用前景。研究Ti2AlNb基合金的微观组织转变机制及相关动力学,对材料成分设计和加工工艺的优化以获得所需性能具有重要的意义。本文总结了Ti2AlNb基合金中组织转变及其动力学机制的研究进展和不足,重点阐述了Ti2AlNb基合金内B2相和O相的生长动力学研究现状,并指出Ti2AlNb基合金在有序无序转变动力学、缺陷密度相关动力学等方面缺乏研究。未来Ti2AlNb基合金需要结合逐渐全面的动力学研究成果来建立组织演变理论模型,从而优化合金成分及工艺,以满足更加复杂严峻的服役环境。

     

  • 图  1  B2/α2相的位移-扩散型转变示意图[14]

    Figure  1.  Schematic diagram of shuffle/diffusion transformation mechanism in B2/α2 phase[14]

    图  2  α2相转变为O相的相变示意图[21]

    Figure  2.  Schematic diagram of phase transformation from α2 phase to O phase [21]

    图  3  Ti3Al-Nb合金中O相析出形貌的TEM显微照片[17] :细密的α2 + O相

    Figure  3.  Precipitation morphology of O phase in Ti3Al-Nb alloy by TEM [17]:fine α2 + O phase

    图  4  不同温度下Ti-22Al-27Nb合金中O相体积分数随等温时间的变化[27]

    Figure  4.  Variation of O phase volume fraction in Ti-22Al-27Nb alloy with holding times at different temperatures[27]

    图  5  “rim O”相的显微形貌图[29]

    Figure  5.  Microstructure of "rim O" phase[29]

    图  6  Ti-22Al-25Nb合金在1040 ℃下保温不同时间的微观形貌[34]   (a) 10 min;(b) 2 h;(c) 6 h

    Figure  6.  Morphology of Ti-22Al-25Nb alloy at heating temperature of 1040 ℃ different holding times for different holding times[34]  (a) 10 min;(b) 2 h;(c) 6 h

    图  7  O相生长动力学研究结果[40]  (a)不同温度下层状O相厚度与时间的关系; (b)不同温度下ln d与ln t 的关系;(c)不同时效时间下${\rm{ln}}( \dfrac{d{\rm{o}}^2}{t}) $与1/ T 的关系

    Figure  7.  Results of O phase growth kinetics[40]  (a) relationship between thickness and time of lamellar O phase at different temperatures; (b) relationship between ln d and ln t at different temperatures; (c) relationship between ${\rm{ln}}( \dfrac{d{\rm{o}}^2}{t})$ and 1/ T under different aging time

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出版历程
  • 收稿日期:  2022-05-29
  • 修回日期:  2022-10-23
  • 网络出版日期:  2022-10-11
  • 刊出日期:  2022-12-02

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