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
- Chinese Journal of Lasers
- Vol. 50, Issue 4, 0402019 (2023)
Fig. 1. Schematic of laser melting and physical drawing of alloy ingot samples
Fig. 2. Metallographic diagrams and primary dendrite spacing of laser melted F100-F0 samples. (a) Metallographic diagrams; (b) primary dendrite spacing
Fig. 3. SEM images of laser melted nickel-based alloys
Fig. 4. SEM image of dendrite trunk and interdendrite region of nickel-based alloy F80 sample by laser rapid melting
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
Fig. 6. Thermo-Calc software simulation calculated γ′ phase nucleation driving force. (a) Al-Ti; (b) Ta-Nb
Fig. 7. TEM diffraction spot calibration of laser rapid melted nickel-based alloys. (a) F90 sample; (b) F20 sample
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
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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