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Chinese Journal of Lasers, Volume. 48, Issue 10, 1002115(2021)

Thermal-Mechanical Coupling of Regional Scanning Based on Characteristic Regions in Laser Additive Manufacturing

Guang Yang1, Yuhang Li1, Siyu Zhou1, Xia Wang1, Lanyun Qin1、*, and Xiangming Wang2
Author Affiliations
  • 1School of Mechatronic Engineering, Shenyang Aerospace University, Shenyang, Liaoning 110136, China
  • 2Shenyang Aircraft Design Institute, Shenyang, Liaoning 110035,China
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    AbstractGet PDF(in Chinese)
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    References (21)
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    Figures & Tables(12)
    Characteristic region model. (a)L-shaped characteristic region;(b)T-shaped characteristic region

    Fig. 1. Characteristic region model. (a)L-shaped characteristic region;(b)T-shaped characteristic region

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    Scanning starting point of characteristic region. (a) L-shaped characteristic region, ipsilateral side starting point scanning; (b) L-shaped characteristic region, opposite side starting point scanning; (c) T-shaped characteristic region, ipsilateral side starting point scanning; (d) T-shaped characteristic region, opposite side starting point scanning

    Fig. 2. Scanning starting point of characteristic region. (a) L-shaped characteristic region, ipsilateral side starting point scanning; (b) L-shaped characteristic region, opposite side starting point scanning; (c) T-shaped characteristic region, ipsilateral side starting point scanning; (d) T-shaped characteristic region, opposite side starting point scanning

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    Temperature distribution nephograms of characteristic region. (a) L-shaped characteristic region, ipsilateral side starting point scanning; (b) L-shaped characteristic region, opposite side starting point scanning; (c) T-shaped characteristic region, ipsilateral side starting point scanning; (d) T-shaped characteristic region, opposite side starting point scanning

    Fig. 3. Temperature distribution nephograms of characteristic region. (a) L-shaped characteristic region, ipsilateral side starting point scanning; (b) L-shaped characteristic region, opposite side starting point scanning; (c) T-shaped characteristic region, ipsilateral side starting point scanning; (d) T-shaped characteristic region, opposite side starting point scanning

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    Thermal cycle of nodes in characteristic region. (a) Node A in L-shaped characteristic region; (a) node B in T-shaped characteristic region

    Fig. 4. Thermal cycle of nodes in characteristic region. (a) Node A in L-shaped characteristic region; (a) node B in T-shaped characteristic region

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    Finite element model of frame structure

    Fig. 5. Finite element model of frame structure

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    Partition jump scanning sequence of frame structure. (a) Continuous jump; (b) interval jump scanning; (c) maximum span jump scanning

    Fig. 6. Partition jump scanning sequence of frame structure. (a) Continuous jump; (b) interval jump scanning; (c) maximum span jump scanning

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    Temperature distribution nephograms of frame structure. (a) Continuous jump scanning;(b) interval jump scanning; (c) maximum span jump scanning

    Fig. 7. Temperature distribution nephograms of frame structure. (a) Continuous jump scanning;(b) interval jump scanning; (c) maximum span jump scanning

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    Evolution of stress field of frame structure. (a) Continuous jump scanning, t=369 s; (b) continuous jump scanning, t=625 s;(c) interval jump scanning, t=369 s; (d) interval jump scanning, t=625 s; (e) maximum span jump scanning, t=369 s; (f) maximum span jump scanning, t=625 s

    Fig. 8. Evolution of stress field of frame structure. (a) Continuous jump scanning, t=369 s; (b) continuous jump scanning, t=625 s;(c) interval jump scanning, t=369 s; (d) interval jump scanning, t=625 s; (e) maximum span jump scanning, t=369 s; (f) maximum span jump scanning, t=625 s

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    Stress distribution nephograms of frame structure. (a) Continuous jump scanning, just after the deposition; (b) continuous jump scanning, after cooling for 300 s; (c) interval jump scanning, just after the deposition; (d) interval jump scanning, after cooling for 300 s; (e) maximum span jump scanning, just after the deposition; (f) maximum span jump scanning, after cooling for 300 s

    Fig. 9. Stress distribution nephograms of frame structure. (a) Continuous jump scanning, just after the deposition; (b) continuous jump scanning, after cooling for 300 s; (c) interval jump scanning, just after the deposition; (d) interval jump scanning, after cooling for 300 s; (e) maximum span jump scanning, just after the deposition; (f) maximum span jump scanning, after cooling for 300 s

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    Temperature-time history of node C

    Fig. 10. Temperature-time history of node C

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    Formation of substrate and frame structure. (a)(b) Continuous jump scanning; (c)(d) interval jump scanning; (e)(f) maximum span jump scanning

    Fig. 11. Formation of substrate and frame structure. (a)(b) Continuous jump scanning; (c)(d) interval jump scanning; (e)(f) maximum span jump scanning

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    • Table 1. Partial thermophysical parameters of TA15 titanium alloy

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      Table 1. Partial thermophysical parameters of TA15 titanium alloy

      Temperature T ∕℃Density ρ ∕kg·m-3Thermal conductivityλ ∕W·m-1·℃-1Specific heat capacityC ∕J·kg-1·℃-1Coefficient of thermal expansion α ∕10-5℃-1
      20445085200.9
      200445010.25870.9
      400445012.26700.9
      600445015.17550.94
      154044502511620.97
      165044502212000.97
      2000445020.512000.97
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    Guang Yang, Yuhang Li, Siyu Zhou, Xia Wang, Lanyun Qin, Xiangming Wang. Thermal-Mechanical Coupling of Regional Scanning Based on Characteristic Regions in Laser Additive Manufacturing[J]. Chinese Journal of Lasers, 2021, 48(10): 1002115

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    Paper Information

    Category: Laser Material Processing

    Received: Oct. 18, 2020

    Accepted: Dec. 8, 2020

    Published Online: May. 18, 2021

    The Author Email: Qin Lanyun (qinly@sau.edu.cn)

    DOI:10.3788/CJL202148.1002115

    Topics

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