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Chinese Journal of Lasers, Volume. 52, Issue 8, 0802303(2025)

Influence of Pulse Laser on Microstructure and Property of TiB2 /Inconel 718 Composite Fabricated by Laser Powder Bed Fusion

Qi Yang1, Pengfei Guo1、*, Zhen Wang1, Changshuai Zhai1, Jianfeng Geng1, Huijun Wang1, Jun Yu2, and Xin Lin2
Author Affiliations
  • 1Shandong Engineering Research Center for Additive Manufacturing, Qingdao University of Technology, Qingdao 266520, Shandong , China
  • 2State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi’an 710072,Shaanxi , China
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    AbstractGet PDF(in Chinese)
    Figures&Tables (14)
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    References (31)
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    Figures & Tables(14)
    SEM images of mixed powder. (a) Low magnification image; (b) high magnification image

    Fig. 1. SEM images of mixed powder. (a) Low magnification image; (b) high magnification image

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    Schematic diagrams of P-LPBF. (a) Schematic diagram of P-LPBF process; (b) waveform of pulsed laser

    Fig. 2. Schematic diagrams of P-LPBF. (a) Schematic diagram of P-LPBF process; (b) waveform of pulsed laser

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    Density of P-LPBF formed TiB2/Inconel 718 composite versus laser volumetric energy density

    Fig. 3. Density of P-LPBF formed TiB2/Inconel 718 composite versus laser volumetric energy density

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    Defect distributions in vertical section and horizontal section of P-LPBF formed TiB2/Inconel 718 composite under OM. (a)(e) ε=190.5 J/mm3; (b)(f) ε=165.1 J/mm3; (c)(g) ε=139.7 J/mm3; (d)(h) ε=114.3 J/mm3

    Fig. 4. Defect distributions in vertical section and horizontal section of P-LPBF formed TiB2/Inconel 718 composite under OM. (a)(e) ε=190.5 J/mm3; (b)(f) ε=165.1 J/mm3; (c)(g) ε=139.7 J/mm3; (d)(h) ε=114.3 J/mm3

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    P-LPBF formed TiB2/Inconel 718 composite under laser volumetric energy density of 222.9 J/mm³. (a) Macroscopic grain morphology in vertical section; (b) macroscopic grain morphology in horizontal section; (c) microstructure in vertical section; (d) microstructure in horizontal section

    Fig. 5. P-LPBF formed TiB2/Inconel 718 composite under laser volumetric energy density of 222.9 J/mm³. (a) Macroscopic grain morphology in vertical section; (b) macroscopic grain morphology in horizontal section; (c) microstructure in vertical section; (d) microstructure in horizontal section

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    Element segregation of P-LPBF formed TiB₂/Inconel 718 composite under laser volumetric energy density of 222.9 J/mm3.

    Fig. 6. Element segregation of P-LPBF formed TiB₂/Inconel 718 composite under laser volumetric energy density of 222.9 J/mm3.

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    Comparison of macroscopic grain morphologies in vertical section of P-LPBF formed TiB2/Inconel 718 composite under different laser volumetric energy density values. (a) 266.7 J/mm3; (b) 241.3 J/mm3; (c) 222.9 J/mm3; (d) 201.6 J/mm3

    Fig. 7. Comparison of macroscopic grain morphologies in vertical section of P-LPBF formed TiB2/Inconel 718 composite under different laser volumetric energy density values. (a) 266.7 J/mm3; (b) 241.3 J/mm3; (c) 222.9 J/mm3; (d) 201.6 J/mm3

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    Comparison of microscopic dendritic morphologies in vertical section of P-LPBF formed TiB2/Inconel 718 composite under different laser volumetric energy density values. (a) 266.7 J/mm3; (b) 241.3 J/mm3; (c) 222.9 J/mm3; (d) 201.6 J/mm3

    Fig. 8. Comparison of microscopic dendritic morphologies in vertical section of P-LPBF formed TiB2/Inconel 718 composite under different laser volumetric energy density values. (a) 266.7 J/mm3; (b) 241.3 J/mm3; (c) 222.9 J/mm3; (d) 201.6 J/mm3

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    Comparison of TiB2 particle distributions in P-LPBF formed TiB2/Inconel 718 composite under different laser volumetric energy density values. (a) 266.7 J/mm3; (b) 241.3 J/mm3; (c) 222.9 J/mm3; (d) 201.6 J/mm3

    Fig. 9. Comparison of TiB2 particle distributions in P-LPBF formed TiB2/Inconel 718 composite under different laser volumetric energy density values. (a) 266.7 J/mm3; (b) 241.3 J/mm3; (c) 222.9 J/mm3; (d) 201.6 J/mm3

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    Vickers hardness test results. (a) Hardness distributions; (b) hardness versus laser volumetric energy density

    Fig. 10. Vickers hardness test results. (a) Hardness distributions; (b) hardness versus laser volumetric energy density

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    Primary dendritic spacing distributions of each sample under different laser volumetric energy density values. (a) 266.7 J/mm3; (b) 241.3 J/mm3; (c) 222.9 J/mm3; (d) 201.6 J/mm3

    Fig. 11. Primary dendritic spacing distributions of each sample under different laser volumetric energy density values. (a) 266.7 J/mm3; (b) 241.3 J/mm3; (c) 222.9 J/mm3; (d) 201.6 J/mm3

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    Relationship between λ1 of P-LPBF formed TiB2/Inconel 718 composite and El

    Fig. 12. Relationship between λ1 of P-LPBF formed TiB2/Inconel 718 composite and El

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    Distributions of flow fields inside molten pool[19]. (a) Continuous laser; (b) pulsed laser

    Fig. 13. Distributions of flow fields inside molten pool[19]. (a) Continuous laser; (b) pulsed laser

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    • Table 1. Experimental parameters of LPBF

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      Table 1. Experimental parameters of LPBF

      Laser power

      P /W

      Point distance

      Pd /μm

      Exposure time

      Te /μs

      Hatch distance

      h /μm

      Layer thickness

      d /μm

      		Laser volumetric energy density ε /（J/mm3）
      200452107050266.7
      190241.3
      130352107050222.9
      190201.6
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    Qi Yang, Pengfei Guo, Zhen Wang, Changshuai Zhai, Jianfeng Geng, Huijun Wang, Jun Yu, Xin Lin. Influence of Pulse Laser on Microstructure and Property of TiB2 /Inconel 718 Composite Fabricated by Laser Powder Bed Fusion[J]. Chinese Journal of Lasers, 2025, 52(8): 0802303

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    Paper Information

    Category: Laser Additive Manufacturing

    Received: Oct. 8, 2024

    Accepted: Nov. 14, 2024

    Published Online: Apr. 2, 2025

    The Author Email: Pengfei Guo (dr2019guopf@163.com)

    DOI:10.3788/CJL241250

    CSTR:32183.14.CJL241250

    Topics

    laser devices and laser physics
    Lasers and Laser Optics
    Laser physics
    laser manufacturing
    Instrumentation, Measurement and Metrology