Shijie Qi, Lin Xiong, Mingyuan Chen, Jikui Zhang. TC4 Titanium Alloy Track Morphology and Pore Formation Mechanism in Laser Powder Bed Fusion Process[J]. Chinese Journal of Lasers, 2023, 50(12): 1202304
- Chinese Journal of Lasers
- Vol. 50, Issue 12, 1202304 (2023)
Fig. 1. Track morphologies under different laser powers
Fig. 2. Influence of laser power on track depth
Fig. 3. Influence of laser power on track width
Fig. 4. TC4 powder bed model with randomly distributed powder position
Fig. 5. Comparison of morphologies between experimental tracks and simulated molten pools under different laser powers
Fig. 6. Evolution of melting and solidification of molten pool (P=100 W,x=100 μm)
Fig. 7. Evolution of melting and solidification of molten pool (P=400 W,x=100 μm)
Fig. 8. Simulated keyhole stability under different laser powers
Fig. 9. Process of key-hole collapse and pore defect formation (P=400 W)
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Table 1. Process parameters applied during manufacturing TC4 titanium alloy tracks
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Table 2. Material thermophysical parameters under different temperatures
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