• Chinese Journal of Lasers
  • Vol. 51, Issue 20, 2002307 (2024)
Yali Li*, Yanli He, Jun Fu, and Jianfeng Zhang
Author Affiliations
  • Materials Engineering Department, AECC Commercial Aircraft Engine Co., Ltd., Shanghai 201306, China
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    DOI: 10.3788/CJL231315 Cite this Article Set citation alerts
    Yali Li, Yanli He, Jun Fu, Jianfeng Zhang. Influence of Si Content on Microstructures and Stress Rupture Properties of Hastelloy X Alloy Formed by Selective Laser Melting[J]. Chinese Journal of Lasers, 2024, 51(20): 2002307 Copy Citation Text show less
    SEM images of Hastelloy X alloy powder. (a) Batch A; (b) batch B
    Fig. 1. SEM images of Hastelloy X alloy powder. (a) Batch A; (b) batch B
    SEM images of SLM-formed Hastelloy X alloy samples. (a) Batch A alloy before stress rupture test; (b) batch A alloy after stress rupture test; (c) batch B alloy before stress rupture test; (d) batch B alloy before stress rupture test
    Fig. 2. SEM images of SLM-formed Hastelloy X alloy samples. (a) Batch A alloy before stress rupture test; (b) batch A alloy after stress rupture test; (c) batch B alloy before stress rupture test; (d) batch B alloy before stress rupture test
    EDS spectra of Hastelloy X alloy precipitates at grain boundary. (a)(b) Before stress rupture test, batch A alloy; (c)(d) after stress rupture test, batch A alloy; (e)(f) before stress rupture test, batch B alloy; (g)(h) after stress rupture test, batch B alloy
    Fig. 3. EDS spectra of Hastelloy X alloy precipitates at grain boundary. (a)(b) Before stress rupture test, batch A alloy; (c)(d) after stress rupture test, batch A alloy; (e)(f) before stress rupture test, batch B alloy; (g)(h) after stress rupture test, batch B alloy
    EDS images of batch B alloy after stress rupture test
    Fig. 4. EDS images of batch B alloy after stress rupture test
    TEM images of batch B alloy after stress rupture test. (a) Precipitates; (b) substrate SAED pattern; (c) substrate and precipitate diffraction patterns
    Fig. 5. TEM images of batch B alloy after stress rupture test. (a) Precipitates; (b) substrate SAED pattern; (c) substrate and precipitate diffraction patterns
    SEM images of stress rupture fractures of SLM formed Hastelloy X alloy samples under 815 ℃. (a)(b) Batch A alloy; (c)(d) batch B alloy
    Fig. 6. SEM images of stress rupture fractures of SLM formed Hastelloy X alloy samples under 815 ℃. (a)(b) Batch A alloy; (c)(d) batch B alloy
    ElementNiCrFeMoCoWSiMnCSTi
    Batch ABal.21.56018.5109.1101.5700.6100.0710.0160.0810.0020.003
    Batch BBal.21.38018.5309.1601.5900.6100.3650.0140.0770.0020.003
    Standard requirementBal.20.500‒23.00017.000‒20.0008.000‒10.0000.500‒2.5000.200‒1.000≤1.000≤1.0000.050‒0.150≤0.003-
    Table 1. Chemical compositions of Hastelloy X alloy powder (mass fraction, %)
    Layer thickness /μmSpot diameter /μmHatchspacing /μmPreheating temperature /℃Laserpower /WScan speed /(mm-1·s)Rotation angle of laser scanning direction /(°)
    201009080200110067
    Table 2. Process parameters for SLM forming of Hastelloy X
    AlloyTime /hElongation /%
    Batch A alloy29.113.0
    Batch B alloy34.86.4
    Forging standard requirement≥24≥10
    Table 3. Stress rupture properties of SLM formed Hastelloy X alloy samples under 815 ℃/105 MPa
    Yali Li, Yanli He, Jun Fu, Jianfeng Zhang. Influence of Si Content on Microstructures and Stress Rupture Properties of Hastelloy X Alloy Formed by Selective Laser Melting[J]. Chinese Journal of Lasers, 2024, 51(20): 2002307
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