Microstructure and High-Temperature Friction and Wear Properties of TiC/CaF<sub>2</sub>/Inconel 718 Composite Fabricated Using Laser Melting Deposition Technique

Zhihong Liu; Yuanfu Liu; Lele Zhang; Deqiang Chen; Chenxiao Shi; Fugang Lu; Zhicheng Feng; Jie Jin

doi:10.3788/CJL202047.0102008

Chinese Journal of Lasers, Volume. 47, Issue 1, 0102008(2020)

Microstructure and High-Temperature Friction and Wear Properties of TiC/CaF₂/Inconel 718 Composite Fabricated Using Laser Melting Deposition Technique

Zhihong Liu¹, Yuanfu Liu^1,2、*, Lele Zhang¹, Deqiang Chen², Chenxiao Shi¹, Fugang Lu¹, Zhicheng Feng¹, and Jie Jin¹

Author Affiliations

¹School of Mechanical, Electronic and Control Engineering, Beijing Jiaotong University, Beijing 100044, China

²National and Local Joint Engineering Laboratory for High-End Bearing Tribology Technology and Application, Henan University of Science and Technology, Henan, Luoyang 471023, China

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Figures & Tables(10)

$X-ray diffraction pattern of laser-melting- deposited composite$

Fig. 1. X-ray diffraction pattern of laser-melting- deposited composite

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Fig. 2. SEM images of typical microstructure of laser-melting-deposited composite. (a) SEM image with low magnification; (b) SEM image with high magnification; (c) local-magnified SEM image

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Fig. 3. Average microhardnesses of laser-melting-deposited composite and reference specimen

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Fig. 4. Wear rate and relative wear-resistance as functions of test load for laser-melting-deposited composite and reference specimen

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Fig. 5. Friction-coefficient curves of laser-melting-deposited composite and reference specimen

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Fig. 6. Cross-section profile curves of wear scars of laser-melting-deposited composite and reference specimen

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Fig. 7. Worn-surface morphologies of laser-melting-deposited composite and reference specimen.(a) Reference specimen; (b) laser-melting-deposited composite

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Fig. 8. SEM image of worn subsurface of laser-melting-deposited composite

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Table 1. Chemical compositions of Inconel 718 powder
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Table 1. Chemical compositions of Inconel 718 powder
Element Mass fraction /%
Al 0.2-0.8
Ti 0.65-1.15
Mo 2.8-3.3
Nb 4.75-5.50
Cr 17-21
Ni 50-55
Mn 0.35
Si 0.35
Cu 0.30
Co 1.00
C 0.08
Fe Bal.

Table 2. Results of EDS analysis corresponding to different regions in Fig. 2(c)
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Table 2. Results of EDS analysis corresponding to different regions in Fig. 2(c)
Zone Mass fraction /% Possible phase
Ti C Ca F Ni Fe Nb Cr Mo Total
A 47.1 46.8 - - 0.6 0.2 4.2 0.8 0.3 100 TiC
B 11.6 11.7 21.4 51.5 0.7 0.2 2.0 0.3 0.6 100 CaF₂ and TiC
C 2.4 13.1 - - 50.5 21.7 - 11.9 0.5 100 γ-(Ni, Fe)

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Zhihong Liu, Yuanfu Liu, Lele Zhang, Deqiang Chen, Chenxiao Shi, Fugang Lu, Zhicheng Feng, Jie Jin. Microstructure and High-Temperature Friction and Wear Properties of TiC/CaF₂/Inconel 718 Composite Fabricated Using Laser Melting Deposition Technique[J]. Chinese Journal of Lasers, 2020, 47(1): 0102008

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