Yin Xie, Qing Teng, Muyu Shen, Jikang Li, Rui Ma, Jie Bai, Qingsong Wei. Study on Microstructure and Properties of Overlap Region of GH3536 Alloy Processed by Multi-Laser Powder Bed Fusion[J]. Chinese Journal of Lasers, 2023, 50(8): 0802303
- Chinese Journal of Lasers
- Vol. 50, Issue 8, 0802303 (2023)
Fig. 1. Characteristics of GH3536 alloy powder. (a) Powder morphology; (b) powder particle size distribution
Fig. 2. Schematics of sample forming. (a) Diagram of quadruple-laser L-PBF forming; (b) L-PBF forming samples; (c) schematics of single-laser processing region and overlap region
Fig. 3. Optical micrographs of melting tracks on sample upper surface. (a) Single-laser processing region; (b) dual-laser processing region; (c) quadruple-laser processing region
Fig. 4. Relative densities and optical micrographs of different samples
Fig. 5.
SEM images of different samples. (a)
Fig. 6.
EBSD results of samples formed by different laser beams along horizontal direction. (a)
Fig. 7. Misorientation angle distributions of different samples. (a) Single-laser processing sample; (b) dual-laser processing sample; (c) quadruple-laser processing sample
Fig. 8.
Residual stress of samples formed by different laser beams. (a)
Fig. 9. Tensile properties of different samples. (a) Stress-strain curves along horizontal direction; (b) yield strength, ultimate tensile strength and elongation rate along horizontal direction
Fig. 10. Differences between single-laser forming area and multi-laser forming area. (a)(c) Laser action zones and molten pools; (b)(d) grain characteristics and defects
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Table 1. Chemical compositions of GH3536 powder
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