• Chinese Journal of Lasers
  • Vol. 52, Issue 12, 1202309 (2025)
Yunqiao Zhang1, Bohan Li1, Guosheng Duan1,*, and Yingwei Zhang2,**
Author Affiliations
  • 1School of Safety Engineering, Shenyang Aerospace University, Shenyang 110136, Liaoning , China
  • 2Institute of Technology, Shenyang Aircraft Corporation, Shenyang 110850, Liaoning , China
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    DOI: 10.3788/CJL241292 Cite this Article Set citation alerts
    Yunqiao Zhang, Bohan Li, Guosheng Duan, Yingwei Zhang. Effect of Processing Parameters on Densification and Mechanical Properties of Additively Manufactured Inconel 738 Alloy[J]. Chinese Journal of Lasers, 2025, 52(12): 1202309 Copy Citation Text show less
    Powder morphology (left) and particle size distribution (right)
    Fig. 1. Powder morphology (left) and particle size distribution (right)
    Samples. (a) During the forming process of the test blocks; (b) after the test block is taken out and the powder is cleared; (c) the size of tensile samples
    Fig. 2. Samples. (a) During the forming process of the test blocks; (b) after the test block is taken out and the powder is cleared; (c) the size of tensile samples
    Microstructures of Inconel 738 printed samples under SEM. (a) XY-plane; (b) Z-plane
    Fig. 3. Microstructures of Inconel 738 printed samples under SEM. (a) XY-plane; (b) Z-plane
    Characterization of porosity defects in Inconel 738 printed samples. (a) OM image; (b) SEM image
    Fig. 4. Characterization of porosity defects in Inconel 738 printed samples. (a) OM image; (b) SEM image
    Characterization of crack defects in Inconel 738 printed samples. (a) E=65 J/mm3; (b) E=67.5 J/mm3; (c) E=70 J/mm3;
    Fig. 5. Characterization of crack defects in Inconel 738 printed samples. (a) E=65 J/mm3; (b) E=67.5 J/mm3; (c) E=70 J/mm3;
    Characterization of unfused defects in Inconel 738 printed samples. (a) E=61.36 J/mm3; (b) E=58.44 J/mm3;
    Fig. 6. Characterization of unfused defects in Inconel 738 printed samples. (a) E=61.36 J/mm3; (b) E=58.44 J/mm3;
    Laser energy density versus densification
    Fig. 7. Laser energy density versus densification
    Relationship between scanning speed and densification under different conditions. (a) Under the conditions of laser power of 280 W and pitch of 0.10 mm; (b) under the conditions of laser power of 260‒300 W and pitch of 0.10 mm
    Fig. 8. Relationship between scanning speed and densification under different conditions. (a) Under the conditions of laser power of 280 W and pitch of 0.10 mm; (b) under the conditions of laser power of 260‒300 W and pitch of 0.10 mm
    Relationship between laser power and densification under different conditions. (a) Under the conditions of scanning speed of 1050 mm/s and pitch of 0.10 mm; (b) under the conditions of scanning speed of 950‒1150 mm/s and pitch of 0.10 mm
    Fig. 9. Relationship between laser power and densification under different conditions. (a) Under the conditions of scanning speed of 1050 mm/s and pitch of 0.10 mm; (b) under the conditions of scanning speed of 950‒1150 mm/s and pitch of 0.10 mm
    Tensile properties of formed samples at different laser energy densities. (a) Engineering stress-engineering strain curves;
    Fig. 10. Tensile properties of formed samples at different laser energy densities. (a) Engineering stress-engineering strain curves;
    SEM images of tensile samples. (a) Group 1; (b) Group 2; (c) Group 3; (d) Group 4; (e) Group 5
    Fig. 11. SEM images of tensile samples. (a) Group 1; (b) Group 2; (c) Group 3; (d) Group 4; (e) Group 5
    Fracture morphology of tensile samples. (a) Group 1; (b) Group 2; (c) Group 3; (d) Group 4; (e) Group 5
    Fig. 12. Fracture morphology of tensile samples. (a) Group 1; (b) Group 2; (c) Group 3; (d) Group 4; (e) Group 5
    ElementMass fraction /%ElementMass fraction /%
    Cr16.25Si0.3
    Co8.47C0.12
    Al3.92Zr0.05‒0.15
    Ti3.55B0.005‒0.015
    W2.6P0.01
    Mo1.7O0.005
    Ta1.7N0.004
    Nb1.05Mn0.003
    Fe0.5NiBal.
    S0.002
    Table 1. Chemical composition of Inconel 738 high-temperature alloy powders
    Layer thickness /μmLaser power /WScanning speed /(mm/s)Pitch /mm
    40260950, 1000, 1050, 1100, 11500.10, 0.11
    40270950, 1000, 1050, 1100, 11500.10, 0.11
    40280950, 1000, 1050, 1100, 11500.10, 0.11
    40290950, 1000, 1050, 1100, 11500.10, 0.11
    40300950, 1000, 1050, 1100, 11500.10, 0.11
    Table 2. Forming parameters of Inconel 738 high-temperature alloy blocks
    Yunqiao Zhang, Bohan Li, Guosheng Duan, Yingwei Zhang. Effect of Processing Parameters on Densification and Mechanical Properties of Additively Manufactured Inconel 738 Alloy[J]. Chinese Journal of Lasers, 2025, 52(12): 1202309
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