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Chinese Journal of Lasers, Volume. 49, Issue 14, 1402208(2022)

Thermal Behavior of Molten Pool for Laser Directed Energy Deposition of 316L/Inconel 718 Multi-Materials

Hao Zhang1,2, Donghua Dai1,2、*, Xinyu Shi1,2, Yanze Li1,2, Luhao Yuan1,2, Guangjing Huang1,2, and Dongdong Gu1,2,3
Author Affiliations
  • 1College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, Jiangsu, China
  • 2Jiangsu Provincial Engineering Laboratory for Laser Additive Manufacturing of High-Performance Metallic Components, Nanjing 210016, Jiangsu, China
  • 3National Key Laboratory of Science and Technology on Helicopter Transmission, Nanjing 210016, Jiangsu, China
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    References (26)
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    Figures & Tables(14)
    Schematic of thermophysical model of LDED forming of 316L/Inconel 718

    Fig. 1. Schematic of thermophysical model of LDED forming of 316L/Inconel 718

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    Finite element model of 316L/Inconel 718. (a) Model and dimension; (b) meshing

    Fig. 2. Finite element model of 316L/Inconel 718. (a) Model and dimension; (b) meshing

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    Flow chart of simulation

    Fig. 3. Flow chart of simulation

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    Microscopic morphologies of 316L and Inconel 718 powders. (a)(b) 316L; (c)(d) Inconel 718

    Fig. 4. Microscopic morphologies of 316L and Inconel 718 powders. (a)(b) 316L; (c)(d) Inconel 718

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    Temperature distribution cloud diagrams of 316L/Inconel 718 during LDED when P316L＝1000 W, v316L＝4 mm/s, PIN718＝1100 W, and vIN718＝10 mm/s. (a) Transient temperature distribution cloud diagram at point A; (b) temperature cloud diagram at point A on 316L layer surface; (c) transient temperature distribution cloud diagram at point B; (d) temperature cloud diagram at surface point B on Inconel 718 layer surface

    Fig. 5. Temperature distribution cloud diagrams of 316L/Inconel 718 during LDED when P316L＝1000 W, v316L＝4 mm/s, PIN718＝1100 W, and vIN718＝10 mm/s. (a) Transient temperature distribution cloud diagram at point A; (b) temperature cloud diagram at point A on 316L layer surface; (c) transient temperature distribution cloud diagram at point B; (d) temperature cloud diagram at surface point B on Inconel 718 layer surface

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    Temperature distribution in Z direction of 316L/Inconel 718 LDED under different process parameters for laser direct energy deposition in center of Inconel 718 layer. (a) Different scanning speeds (PIN718＝1100 W); (b) different laser powers (vIN718＝10 mm/s)

    Fig. 6. Temperature distribution in Z direction of 316L/Inconel 718 LDED under different process parameters for laser direct energy deposition in center of Inconel 718 layer. (a) Different scanning speeds (PIN718＝1100 W); (b) different laser powers (vIN718＝10 mm/s)

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    Temperature gradient distributions in Z direction of 316L/Inconel 718 under different process parameters for laser direct energy deposition in center of Inconel 718 layer. (a) Different scanning speeds (PIN718＝1100 W); (b) different laser powers (vIN718＝10 mm/s)

    Fig. 7. Temperature gradient distributions in Z direction of 316L/Inconel 718 under different process parameters for laser direct energy deposition in center of Inconel 718 layer. (a) Different scanning speeds (PIN718＝1100 W); (b) different laser powers (vIN718＝10 mm/s)

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    Maximum temperature of molten pool and liquid phase lifetime in 316L layer under different process parameters for laser direct energy deposition in center of Inconel 718 layer. (a) Different laser powers (vIN718＝10 mm/s); (b) different scanning speeds (PIN718＝1100 W)

    Fig. 8. Maximum temperature of molten pool and liquid phase lifetime in 316L layer under different process parameters for laser direct energy deposition in center of Inconel 718 layer. (a) Different laser powers (vIN718＝10 mm/s); (b) different scanning speeds (PIN718＝1100 W)

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    Cross-sectional morphologies of molten pool and remelting size of 316L layer deposited in center of Inconel 718 layer with different laser powers (vIN718＝10 mm/s). (a) PIN718＝900 W; (b) PIN718＝1100 W; (c) PIN718＝1300 W; (d) PIN718＝1500 W; (e) Rd versus laser power

    Fig. 9. Cross-sectional morphologies of molten pool and remelting size of 316L layer deposited in center of Inconel 718 layer with different laser powers (vIN718＝10 mm/s). (a) PIN718＝900 W; (b) PIN718＝1100 W; (c) PIN718＝1300 W; (d) PIN718＝1500 W; (e) Rd versus laser power

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    Cross-sectional morphologies of molten pool and remelting size of 316L layer deposited in center of Inconel 718 layer with different scanning speeds when PIN718＝1100 W. (a) vIN718＝7 mm/s; (b) vIN718＝10 mm/s; (c) vIN718＝14 mm/s; (d) vIN718＝20 mm/s; (e) Rd versus scanning speed

    Fig. 10. Cross-sectional morphologies of molten pool and remelting size of 316L layer deposited in center of Inconel 718 layer with different scanning speeds when PIN718＝1100 W. (a) vIN718＝7 mm/s; (b) vIN718＝10 mm/s; (c) vIN718＝14 mm/s; (d) vIN718＝20 mm/s; (e) Rd versus scanning speed

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    Cross-sectional metallographic diagrams of molten pool under different experimental parameters. (a) PIN718＝900 W，vIN718＝10 mm/s; (b) PIN718＝1100 W，vIN718＝10 mm/s; (c) PIN718＝1100 W，vIN718＝7 mm/s

    Fig. 11. Cross-sectional metallographic diagrams of molten pool under different experimental parameters. (a) PIN718＝900 W，vIN718＝10 mm/s; (b) PIN718＝1100 W，vIN718＝10 mm/s; (c) PIN718＝1100 W，vIN718＝7 mm/s

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    • Table 1. Parameters used in finite element simulation

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      Table 1. Parameters used in finite element simulation

      Parameter316LInconel 718
      Laser power /W1000900，1100，1300，1500
      Laser diameter /mm33
      Scan speed /(mm/s)47，10，14，20
      Sedimentary thickness /mm0.60.4
      Ambient initial temperature /℃2525
      Deposition length /mm1010
      Absorptivity /%40[19]25[20]

    • Table 2. Thermophysical parameters of 316L

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      Table 2. Thermophysical parameters of 316L

      Temperature /℃25200400600800100012001400
      Thermal conductivity /[W/(m· K)]5540252527100150150
      Specific heat /[J/(kg· K)]4555016918046987806711065
      Density /(kg/m3)77317680761575467469746173547218

    • Table 3. Thermophysical parameters of Inconel 718

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      Table 3. Thermophysical parameters of Inconel 718

      Temperature /℃25200400600800100012001400
      Thermal conductivity /[W/(m·K)]232518202326100100
      Specific heat /[J/(kg·K)]432498610600714782638715
      Density /(kg/m3)82848228817680997992788977937492
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    Hao Zhang, Donghua Dai, Xinyu Shi, Yanze Li, Luhao Yuan, Guangjing Huang, Dongdong Gu. Thermal Behavior of Molten Pool for Laser Directed Energy Deposition of 316L/Inconel 718 Multi-Materials[J]. Chinese Journal of Lasers, 2022, 49(14): 1402208

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    Paper Information

    Received: Nov. 26, 2021

    Accepted: Feb. 18, 2022

    Published Online: Jun. 14, 2022

    The Author Email: Dai Donghua (donghuadai@nuaa.edu.cn)

    DOI:10.3788/CJL202249.1402208

    Topics

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