Microstructure Formation and Evolution Mechanism of Laser Rapid Melted Nickel Based Alloy Based on Composition Gradient

Ronggui Lu; Xinyue Zhang; Xu Cheng; Jia Li; Dong Liu; Yudai Wang; Yiwei Liu

doi:10.3788/CJL202350

Chinese Journal of Lasers, Volume. 50, Issue 4, 0402019(2023)

Microstructure Formation and Evolution Mechanism of Laser Rapid Melted Nickel Based Alloy Based on Composition Gradient

Ronggui Lu^1,2, Xinyue Zhang^1,2, Xu Cheng^1,2,3、*, Jia Li^1,4, Dong Liu^1,4, Yudai Wang^1,2,3, and Yiwei Liu⁵

¹National Engineering Laboratory of Additive Manufacturing for Large Metallic Components, Beihang University, Beijing 100191, China

²School of Materials Science and Engineering, Beihang University, Beijing 100191, China

³Research Institute for Frontier Science, Beihang University, Beijing 100191, China

⁴Beijing Yuding Advanced Materials & Manufacturing Technologies Co, Ltd., Beijing 100096, China

⁵No.1 Military Representative Office of Air Force Equipment Department Stationed in Shenyang, Shenyang 110148, Liaoning , China

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Figures & Tables(10)

Fig. 1. Schematic of laser melting and physical drawing of alloy ingot samples

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Fig. 2. Metallographic diagrams and primary dendrite spacing of laser melted F100-F0 samples. (a) Metallographic diagrams; (b) primary dendrite spacing

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Fig. 3. SEM images of laser melted nickel-based alloys

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Fig. 4. SEM image of dendrite trunk and interdendrite region of nickel-based alloy F80 sample by laser rapid melting

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Fig. 5. γ′ phase content and size of laser rapid melted nickel-based alloys with different components. (a) γ′ phase content; (b) γ′ phase size

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Fig. 6. Thermo-Calc software simulation calculated γ′ phase nucleation driving force. (a) Al-Ti; (b) Ta-Nb

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$TEM diffraction spot calibration of laser rapid melted nickel-based alloys. (a) F90 sample; (b) F20 sample$

Fig. 7. TEM diffraction spot calibration of laser rapid melted nickel-based alloys. (a) F90 sample; (b) F20 sample

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Fig. 8. SEM image of laser rapid melted nickel-based alloy sample and calculation result of Scheil solidification model of Thermo-Calc software. (a) SEM image; (b) calculation result of Scheil solidification model

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Fig. 9. Microhardness of laser rapid melted nickel base alloys

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Table 1. Composition proportion of mixed powder
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Table 1. Composition proportion of mixed powder
Sample No. Mass fraction of IC10 /% Mass fraction of FGH9X /%
F100 0 100
F90 10 90
F80 20 80
F70 30 70
F60 40 60
F50 50 50
F40 60 40
F30 70 30
F20 80 20
F10 90 10
F0 100 0

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Ronggui Lu, Xinyue Zhang, Xu Cheng, Jia Li, Dong Liu, Yudai Wang, Yiwei Liu. Microstructure Formation and Evolution Mechanism of Laser Rapid Melted Nickel Based Alloy Based on Composition Gradient[J]. Chinese Journal of Lasers, 2023, 50(4): 0402019

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