Chinese Journal of Lasers, Volume. 50, Issue 12, 1202302(2023)
Forming Characteristics and Defects of GH3536 Superalloy by Selective Laser Melting
Figures & Tables(14)
Fig. 2. Comparison of molten pool morphology and temperature field during single-layer deposition with different laser scanning speeds at the same position (laser power of 190 W). (a) (c) Scanning speed of 0.94 m/s; (b) (d) scanning speed of 1.25 m/s
Fig. 3. Flow field of liquid metal in molten pool of selective laser melting at different scanning speeds (laser power of 190 W). (a) Scanning speed of 0.94 m/s; (b) scanning speed of 1.25 m/s
Fig. 4. Comparison of molten pool morphology and temperature field during single-layer deposition with different laser powers at the same time (scanning speed of 0.94 m/s). (a) Laser power of 190 W; (b) laser power of 250 W
Fig. 5. Comparison of molten pool morphology and temperature field during single-layer deposition with different laser powers at the same time (scanning speed of 1.25 m/s). (a)(c) Laser power of 190 W; (b)(d) laser power of 250 W
Fig. 6. Flow field of liquid metal in molten pool of laser selective melting under different laser powers (scanning speed of 0.94 m/s). (a) Laser power of 190 W; (b) laser power of 250 W
Fig. 7. Variations of molten pool morphology and temperature field during multilayer deposition (laser power of 190 W and scanning speed of 1.08 m/s)
Fig. 8. Two-channel single-layer deposition topography with different energy densities. (a) Laser power of 195 W and scanning speed of 1.15 m/s; (b) laser power of 250 W and scanning speed 0.94 m/s
Fig. 9. Multi-channel deposition topography with different scanning distances. (a)(b) Laser power of 195 W, scanning speed of 1.15 m/s, and scanning distance of 80 μm; (c)(d) laser power of 195 W, scanning speed of 1.15 m/ s, and scanning distance of 110 μm
Fig. 10. Cross-sectional views of molten pool and pores at z=150 μm for multilayer deposition with different energy densities. (a)(b) Laser power of 120 W and scanning speed of 1 m/s; (c)(d) laser power of 80 W and scanning speed of 1.2 m/s
Fig. 11. Cross-sectional views of molten pool and pores at z=150 μm for monolayer deposition with different scanning distances. (a)-(c) Scanning distance h=80 μm; (d)-(f) scanning distance h=110 μm
Fig. 12. As-deposited microstructures of GH3536 alloy by selective laser melting. (a) Experimental result; (b) simulation result
Table 1. Process parameters used for selective laser melting (SLM) of GH3536
View tableTable 1. Process parameters used for selective laser melting (SLM) of GH3536
No. Laser power /W Laser scan speed /（m·s-1） Hatch spacing /µm Powder layer thickness /μm 1 195 1.15 80 40 2 190 1.08 90 40 3 80 1.20 90 40 4 190 1.25 90 40 5 250 1.25 90 40 6 190 0.94 90 40 7 250 0.94 80 40 8 120 1.00 90 40 9 195 1.15 110 40
Table 2. Thermophysical parameters of GH3536[26]
View tableTable 2. Thermophysical parameters of GH3536[26]
Thermophysical parameter Value Density /（kg·m-3） 8248 Solidus temperature /K 1533 Liquidus temperature /K 1628 Latent heat of fusion /（J·kg-1） 2.76 105 Vaporization heat /（J·kg-1） 6.45 106 Solid thermal conductivity /（W·m-1·K-1） 0.7182+3.68×10-2T-8×10-6T2 Liquid thermal conductivity /（W·m-1·K-1） 29 Solid specific heat /（J·kg-1·K-1） 323.33+0.14T-0.5×10-6T2 Specific heat of liquid /（J·kg-1·K-1） 677 Dynamic viscosity /（kg·m-1·s-1） 5.48 10-3
Tools
Get Citation
Copy Citation Text
Jun Li, Tingting Liu, Wenhe Liao, Huiliang Wei, Jinhui Xu, Qingyuan Yin. Forming Characteristics and Defects of GH3536 Superalloy by Selective Laser Melting[J]. Chinese Journal of Lasers, 2023, 50(12): 1202302
Paper Information
Category: Laser Additive Manufacturing
Received: Jul. 27, 2022
Accepted: Nov. 4, 2022
Published Online: Jun. 6, 2023
The Author Email: Liu Tingting (liutingting@mail.njust.edu.cn)
© Copyright 2018-2021 | Chinese Laser Press.
All Rights Reserved 沪ICP备15018463号-20