Microstructure and high-temperature tensile properties of Ti<sub>2</sub>AlNb/TA15 laminated composites prepared by vacuum hot pressing

SHAO Xinxiang; ZHANG Shouyin; ZHANG Kun; WAN Junjie; LU Baiping

doi:10.13801/j.cnki.fhclxb.20240012.002

Volume 41 Issue 8

Aug. 2024

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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, 2024, 41(8): 4353-4365. doi: 10.13801/j.cnki.fhclxb.20240012.002

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, 2024, 41(8): 4353-4365. doi: 10.13801/j.cnki.fhclxb.20240012.002

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

doi: 10.13801/j.cnki.fhclxb.20240012.002

School of Aeronautical Manufacturing Engineering, Nanchang Hangkong University, Nanchang 330063, China

Funds: Jiangxi Province Key Disciplines Academic and Technical Leaders Training Program (20225 BCJ22002)

Received Date: 2023-11-01
Accepted Date: 2024-01-03
Rev Recd Date: 2023-12-10

Available Online: 2024-01-15

Publish Date: 2024-08-01

Abstract

Abstract

In order to improve the intrinsic brittleness of Ti₂AlNb alloy without sacrificing its high-temperature performance, a composite material was prepared by combining it with high-temperature titanium alloy TA15 using vacuum hot pressing. The effects of different hot pressing temperatures on the microstructure and tensile properties of Ti₂AlNb/TA15 laminated composite materials were investigated. The results show that the pore defects in the interface layer gradually decrease with the increase of the hot pressing temperature. A defect-free metallurgical bonding interface can be achieved at temperatures of 1050℃ and above. The thickness of the interface reaction layer increases with the rise of the hot pressing temperature. Under the diffusion conditions at 1050℃ and above, a transition layer of certain width formed between the reaction zone and the Ti₂AlNb layers, which improve the properties of the interface bonding. Tensile tests indicate that the room and high-temperature tensile properties of the Ti₂AlNb/TA15 laminated composite material are significantly improved compared with Ti₂AlNb alloy. The laminated composite material under the hot pressing temperature condition of 1050℃ exhibits excellent comprehensive performance, with a high-temperature tensile strength and strain of 667.85 MPa and 16.2%, respectively.
- vacuum hot pressing,
- laminated composites,
- hot pressing temperature,
- microstructure,
- high-temperature tensile properties
Long Abstrsct
Innovation Points

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References(38)

References

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