Muyu Shen, Yin Xie, Jikang Li, Chao Cai, Qing Teng, Qingsong Wei. Influence of Laser Power on Microstructure and Properties of Overlap Region in Dual-Laser Powder Bed Fusion of GH3536 Superalloy[J]. Chinese Journal of Lasers, 2023, 50(24): 2402301
- Chinese Journal of Lasers
- Vol. 50, Issue 24, 2402301 (2023)
Fig. 1. Morphology and particle size of GH3536 alloy powder. (a) SEM morphology; (b) particle size distribution
Fig. 2. Scanning strategy of GH3536 alloy specimens formed by ML-PBF with different laser powers
Fig. 3. Measured relative density and porosity. (a) Relative density and porosity; (b)‒(e) micro-pores morphology in the overlap region of specimens of groups 1, 2, 3 and 4
Fig. 4. XRD results of four groups of specimens in the overlap region
Fig. 5. Scanning electron micrographs of the upper surface of the overlap region. (a) Group 1; (b) group 2; (c) group 3; (d) group 4
Fig. 6. Scanning electron micrographs of overlap region grains in the building direction. (a) Group 1; (b) group 2; (c) group 3; (d) group 4
Fig. 7. EBSD results of overlap region in the building direction. (a)(d)(g)(j) Inverse pole figures (IPFs); (b)(e)(h)(k) grain size statistics; (c)(f)(i)(l) misorientation angle statistics
Fig. 8. Scatter plots and linear fit of dψ and sin2
Fig. 9. Hardness statistics of overlap region
Fig. 10. Tensile properties of four groups of specimens. (a) Horizontal stress-strain curves; (b) horizontal yield strength, tensile strength and elongation
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Table 1. Calculated lattice constant of γ phase in four groups of specimens
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