Study on microstructure and wear properties of TiAl alloy deposited by laser melting

Wang Haijiang; Liu Zhanqi; Liang Jianhui; Yin Guili; Zhu Xiaoou

doi:10.7513/j.issn.1004-7638.2024.03.012

Volume 45 Issue 3

Jul. 2024

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Wang Haijiang, Liu Zhanqi, Liang Jianhui, Yin Guili, Zhu Xiaoou. Study on microstructure and wear properties of TiAl alloy deposited by laser melting[J]. IRON STEEL VANADIUM TITANIUM, 2024, 45(3): 86-91. doi: 10.7513/j.issn.1004-7638.2024.03.012

Citation:

Wang Haijiang, Liu Zhanqi, Liang Jianhui, Yin Guili, Zhu Xiaoou. Study on microstructure and wear properties of TiAl alloy deposited by laser melting[J]. IRON STEEL VANADIUM TITANIUM, 2024, 45(3): 86-91. doi: 10.7513/j.issn.1004-7638.2024.03.012

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Study on microstructure and wear properties of TiAl alloy deposited by laser melting

doi: 10.7513/j.issn.1004-7638.2024.03.012

School of Materials Science and Engineering, Liaoning University of Technology, Jinzhou 121001, Liaoning, China

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Received Date: 2023-05-21
Publish Date: 2024-07-02

Abstract

Abstract

One-layer, three-layer and five-layer Ti-48Al-2Cr-2Nb alloy samples were prepared on TC4 substrate by coaxial laser powder-feeding deposition manufacturing process. The microstructure, crack morphology, wear surface morphology and phase composition of the deposited layer were analyzed by optical microscope (OM), scanning electron microscope (SEM), energy dispersive spectrometer (EDS) and X-ray diffraction (XRD). The test results show that the number of cracks on the surface of the sample deposited with one layer is less, and the samples deposited with three and five layers have more surface cracks and the number of cracks is not much different. As the number of sedimentary layers increases, the microstructure in the sedimentary layer transits from a basket structure to a lamellar structure, and the phase change in the structure is from a single phase α₂ to α₂+γ dual phase transition. As the α₂ phase content decreases, the wear resistance decreases, and the average friction coefficient increases from 0.34 to 0.55.
- laser deposition manufacturing,
- TiAl alloy,
- microstructure,
- wear properties

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References(17)

References

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