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真空热压法制备Ti2AlNb/TA15叠层复合材料的微观组织及其高温拉伸性能

邵鑫香 张守银 张堃 万俊杰 卢百平

邵鑫香, 张守银, 张堃, 等. 真空热压法制备Ti2AlNb/TA15叠层复合材料的微观组织及其高温拉伸性能[J]. 复合材料学报, 2024, 42(0): 1-13.
引用本文: 邵鑫香, 张守银, 张堃, 等. 真空热压法制备Ti2AlNb/TA15叠层复合材料的微观组织及其高温拉伸性能[J]. 复合材料学报, 2024, 42(0): 1-13.
SHAO Xinxiang, ZHANG Shouyin, ZHANG Kun, et al. Microstructure and high-temperature tensile properties of Ti2AlNb/TA15 laminated composites prepared by vacuum hot pressing[J]. Acta Materiae Compositae Sinica.
Citation: SHAO Xinxiang, ZHANG Shouyin, ZHANG Kun, et al. Microstructure and high-temperature tensile properties of Ti2AlNb/TA15 laminated composites prepared by vacuum hot pressing[J]. Acta Materiae Compositae Sinica.

真空热压法制备Ti2AlNb/TA15叠层复合材料的微观组织及其高温拉伸性能

基金项目: 江西省主要学科学术与技术带头人培养计划 (20225 BCJ22002)
详细信息
    通讯作者:

    张守银,博士,讲师,硕士生导师,研究方向为钛及钛铝合金制备 E-mail: zhangsy@nchu.edu.cn

  • 中图分类号: TB331

Microstructure and high-temperature tensile properties of Ti2AlNb/TA15 laminated composites prepared by vacuum hot pressing

Funds: Jiangxi Province Key Disciplines Academic and Technical Leaders Training Program (20225 BCJ22002)
  • 摘要: 为改善Ti2AlNb合金的本征脆性且不牺牲其高温性能,将其与高温钛合金TA15进行复合,采用真空热压法制备了Ti2AlNb/TA15叠层复合材料,研究了不同热压温度对其微观组织及其拉伸性能的影响。研究结果表明,界面层的孔洞缺陷随热压温度的升高逐渐减少,热压温度在1050℃及以上时可以获得无缺陷冶金结合界面。界面反应层厚度随热压温度的升高而增加,且在1050℃及以上的扩散温度条件下,反应区和Ti2AlNb层间形成了一定宽度的过渡层,提升了界面结合性能。拉伸实验结果表明,相较于Ti2AlNb合金,Ti2AlNb/TA15叠层复合材料的室温和高温拉伸性能均有显著的提升。其中1050℃热压温度条件下的叠层复合材料具有较好的综合性能,650℃高温抗拉强度和应变分别为667.85 MPa和16.2%。

     

  • 图  1  预制体结构示意图

    Figure  1.  Schematic diagram of the preform structure

    图  2  依据Ti-22 Al-xNb合金相图设计的热压工艺

    Figure  2.  Hot pressing process designed based on the phase diagram of Ti-22 Al-xNb alloy

    图  3  热压工艺参数示意图

    Figure  3.  Schematic diagram of hot pressing process Parameters

    图  4  高温拉伸试样示意图(单位:mm)

    Figure  4.  Schematic diagram of high-temperature tensile specimen (Unit: mm)

    图  5  Ti2AlNb/TA15叠层复合材料光镜图:(a) 850℃; (b) 980℃; (c) 1050℃; (d) 1100℃

    Figure  5.  Light microscope diagrams of Ti2AlNb/TA15 laminated composites: (a) 850℃; (b) 980℃; (c) 1050℃; (d) 1100℃

    图  6  不同热压温度叠层复合材料的SEM图像(二次电子):(a)、(e) 850℃; (b)、(f) 980℃; (c)、(g) 1050℃; (d)、(h) 1100℃

    Figure  6.  SEM images of laminated composites with different hot pressing temperatures: (a), (e) 850℃; (b), (f) 980℃; (c), (g) 1050℃; (d), (h) 1100℃

    图  7  不同热压温度下叠层界面显微组织SEM(二次电子)图像及扫描能谱图:(a) 850℃; (b) 980℃; (c) 1050℃; (d) 1100℃

    Figure  7.  SEM images of microstructures and scanning energy spectra of the laminated interface under different hot pressing temperatures: (a) 850℃; (b) 980℃; (c) 1050℃; (d) 1100℃

    图  8  原始状态及不同热压温度下Ti2AlNb微观组织背散图及对应的X射线衍射图谱:(a) As cast; (b) 980℃; (c) 1050℃; (d) 1100℃

    Figure  8.  BSE of Ti2AlNb microstructures and corresponding X-ray diffraction patterns under original state and different hot pressing temperatures: (a) As cast; (b) 980℃; (c) 1050℃; (d) 1100℃

    图  9  Ti2AlNb/TA15叠层复合材料界面区相分布图、晶粒取向图和IPF图:((a)~(c)) 980℃; ((d)~(f)) 1050℃; ((g)~(i))1100℃

    Figure  9.  Ti2AlNb/TA15 laminated composites interface zone phase distributions, grain orientations and IPF diagrams: ((a)-(c)) 980℃; ((d)-(f)) 1050℃; ((g)-(i))1100℃

    图  10  Ti2AlNb/TA15叠层复合材料室温拉伸应力-应变曲线

    Figure  10.  Stress-strain curves of Ti2AlNb/TA15 laminated composites at room temperature

    图  11  Ti2AlNb/TA15叠层复合材料界面处硬度

    Figure  11.  Hardness of Ti2AlNb/TA15 laminated composites near the interfaces

    图  12  Ti2AlNb/TA15叠层复合材料650℃高温拉伸应力-应变曲线

    Figure  12.  Stress-strain curve of Ti2 AlNb/TA15 laminated composites at 650°C

    图  13  Ti2AlNb/TA15叠层复合材料界面区、Ti2AlNb基体和TA15基体断口SEM(SE)图:((a)~(c)) 850℃; ((d)~(f)) 980℃; ((g)~(i)) 1050℃; ((j)~(l))1100℃

    Figure  13.  SEM (SE) images of Ti2 AlNb/TA15 stacked composite interfacial region, Ti2 AlNb matrix and TA15 matrix fracture: ((a)-(c)) 850℃; ((d)-(f)) 980℃; ((g)-(i)) 1050℃; ((j)-(l))1100℃

    表  1  Ti2AlNb和TA15的化学成分

    Table  1.   Chemical compositions of Ti2AlNb and TA15

    MaterialsChemical composition
    TA15/wt%Al: 6.78, Mo: 1.7, V: 2.31, Zr: 2.00, Fe<0.05, Si<0.017, O<0.11, N<0.011, Ti: Bal.
    Ti2AlNb/at%Al: 22.3, Nb:25.2, Ti: Bal.
    下载: 导出CSV

    表  2  Ti2AlNb/TA15叠层复合材料制备工艺参数

    Table  2.   Preparation process parameters of Ti2AlNb/TA15 laminated composites

    Exp.Phase 1Phase 2Phase 3
    T1/℃t1/hP1/MPaT2/℃t2/hP2/MPaT3/℃t3/hP3/MPa
    1850210850240600110
    2980210980240600110
    310502101050240600110
    411002101100240600110
    Notes:T1, T2 and T3 are the hot-pressing temperature in the first, second and third stage; t1, t2 and t3 are the holding time in the first, second and third stage; P1, P2 and P3 are the hot-pressing pressure in the first, second and third stage.
    下载: 导出CSV

    表  3  Ti2AlNb/TA15叠层复合材料室温拉伸强度和应变

    Table  3.   Room temperature tensile strength and strain of Ti2AlNb/TA15 laminated composites

    Specimens Hot pressing temperature/℃ Tensile strength/MPa Tensile strain/%
    TA15/Ti2AlNb 850 726.22 6.42
    980 873.21 7.28
    1050 817.44 9.37
    1100 775.79 10.35
    Ti2AlNb (as cast) 660.09 3.10
    下载: 导出CSV

    表  4  Ti2AlNb/TA15叠层复合材料650℃高温拉伸强度和应变

    Table  4.   650°C High temperature tensile strength and strain of Ti2AlNb/TA15 laminated composites

    Specimens Hot pressing temperature/℃ Tensile strength/MPa Tensile strain/%
    Ti2AlNb/TA15 850℃ 607.71 11.1
    980℃ 711.58 12.5
    1050℃ 667.85 16.2
    1100℃ 632.76 17.7
    Ti2AlNb (as cast) 555.08 10.5
    下载: 导出CSV
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  • 收稿日期:  2023-11-01
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