Wei Song, Yuping Zhu, Jingjing Liang, Yizhou Zhou, Xiaofeng Sun, Jinguo Li. Effect of Powder Recycling on Microstructure and Tensile Behavior of GH4169 Alloy Fabricated by Selective Laser Melting (Invited)[J]. Chinese Journal of Lasers, 2024, 51(10): 1002310
- Chinese Journal of Lasers
- Vol. 51, Issue 10, 1002310 (2024)
Fig. 1. Schematic of experimental procedure
Fig. 2. Microstructures of powder under different recycling times. (a) 0; (b) 6; (c) 10; (d) 13
Fig. 3. Longitudinal section microstructures of powder under different recycling times. (a)(b)(c) 0; (d)(e)(f) 6; (g)(h)(i) 10; (j)(k)(l) 13
Fig. 4. Particle size distribution and distribution state of powder under different recycling times. (a) Particle size distribution of powder; (b) distribution state of powder
Fig. 5. Microstructures of samples prepared under different powder recycling times after heat treatment. (a)(b)(c) 0th sample;
Fig. 6. EBSD analysis results of samples prepared under different powder recycling times after heat treatment. (a) 0th sample; (b) 6th sample; (c) 10th sample; (d) 13th sample
Fig. 7. Tensile curves of samples prepared under different powder recycling times after heat treatment. (a) Room temperature;(b) 650 ℃
Fig. 8. RT tensile fracture morphologies of samples prepared under different powder recycling times after heat treatment. (a)(b)(c) 0th sample; (d)(e)(f) 6th sample; (g)(h)(i) 10th sample; (j)(k)(l) 13th sample
Fig. 9. Longitudinal section microstructures of RT tensile fracture morphologies of samples prepared under different powder recycling times after heat treatment. (a)(b)(c)(d) 0th sample; (e)(f)(g)(h) 6th sample; (i)(j)(k)(l) 10th sample; (m)(n)(o)(p) 13th sample
Fig. 10. 650 ℃ tensile fracture morphologies of samples prepared under different powder recycling times after heat treatment.
Fig. 11. Longitudinal section microstructures of 650 ℃ tensile fracture morphologies of samples prepared under different powder recycling times after heat treatment. (a)(b)(c)(d) 0th sample; (e)(f)(g)(h) 6th sample; (i)(j)(k)(l) 10th sample; (m)(n)(o)(p) 13th sample
Fig. 12. TEM images near RT tensile fracture of samples prepared under different powder recycling times after heat treatment.
Fig. 13. TEM images near 650 ℃ tensile fracture of samples prepared under different powder recycling times after heat treatment.
Fig. 14. Tensile deformation mechanisms at RT and 650 °C. (a) RT; (b) 650 ℃
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Table 1. Measured compositions of GH4169 alloy powders under different recycling times (mass fraction, %)
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Table 2. Heat treatment regimes for fabricating GH4169 samples
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Table 3. Particle size distributions of powder under different recycling times
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Table 4. Tensile properties of samples prepared under different powder recycling times after heat treatment
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Table 5. Performance comparison of GH4169 alloys with different states after heat treatment
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