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Author:

Li, T. (Li, T..) | Wei, Y. (Wei, Y..) | Li, L. (Li, L..) | Xu, Y. (Xu, Y..) | Kamal, B. (Kamal, B..) | Zhang, D. (Zhang, D..) | Reinhart, P. (Reinhart, P..) | Schleifenbaum, J.H. (Schleifenbaum, J.H..)

Indexed by:

EI Scopus SCIE

Abstract:

Laser powder bed fusion (LPBF) offers significant advantages in manufacturing complex and customized metal parts, with thermal and dynamic features being key factors linking process and properties. A fundamental understanding of the process-thermal relationships is crucial for performance control and process optimization of LPBF fabricated components. Different from most literature focusing on the effects of process parameters on molten pool evolution, this work uniquely explores the thermal and dynamic fluctuation at the corner of a formed part and the influence of contour scanning on the thermal and dynamic features of a multi-track part. A coupled thermo-dynamic model based on the lattice Boltzmann method was proposed to study the molten pool dynamics of infill tracks during continuous processing of TC4 alloy. A comparative study was conducted to track the temperature and fluid field of processes both with and without contour scanning to address the mechanisms of molten pool evolution with process strategies. The numerical results show that the peak temperature with contour scanning is approximately 25% higher than that without contour scanning at the corner of adjacent tracks, while the differences are lower at other positions. The presence of contour scanning leads to lower thermal fluctuation at the edges of a manufactured part. However, contour scanning introduces heat accumulation before the infill track and weakens heat transfer, resulting in asymmetrically distributed molten pool in the infill track. © 2024 Elsevier Ltd

Keyword:

Multi-track Contour scanning Thermal feature Thermal fluid dynamics Laser powder bed fusion

Author Community:

  • [ 1 ] [Li T.]School of Physics and Optoelectronic Engineering, Beijing University of Technology, Beijing, 100124, China
  • [ 2 ] [Li T.]Beijing Engineering Research Center of 3D Printing for Digital Medical Health, Beijing, 100124, China
  • [ 3 ] [Wei Y.]School of Physics and Optoelectronic Engineering, Beijing University of Technology, Beijing, 100124, China
  • [ 4 ] [Wei Y.]Beijing Engineering Research Center of 3D Printing for Digital Medical Health, Beijing, 100124, China
  • [ 5 ] [Li L.]School of Physics and Optoelectronic Engineering, Beijing University of Technology, Beijing, 100124, China
  • [ 6 ] [Li L.]Beijing Engineering Research Center of 3D Printing for Digital Medical Health, Beijing, 100124, China
  • [ 7 ] [Xu Y.]School of Physics and Optoelectronic Engineering, Beijing University of Technology, Beijing, 100124, China
  • [ 8 ] [Xu Y.]Beijing Engineering Research Center of 3D Printing for Digital Medical Health, Beijing, 100124, China
  • [ 9 ] [Kamal B.]School of Physics and Optoelectronic Engineering, Beijing University of Technology, Beijing, 100124, China
  • [ 10 ] [Kamal B.]Beijing Engineering Research Center of 3D Printing for Digital Medical Health, Beijing, 100124, China
  • [ 11 ] [Zhang D.]School of Physics and Optoelectronic Engineering, Beijing University of Technology, Beijing, 100124, China
  • [ 12 ] [Zhang D.]Beijing Engineering Research Center of 3D Printing for Digital Medical Health, Beijing, 100124, China
  • [ 13 ] [Reinhart P.]Fraunhofer Institute for Laser Technology ILT, Aachen, D-52074, Germany
  • [ 14 ] [Schleifenbaum J.H.]RWTH Aachen University-Digital Additive Production (DAP), Aachen, D-52074, Germany

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Source :

Optics and Laser Technology

ISSN: 0030-3992

Year: 2024

Volume: 177

5 . 0 0 0

JCR@2022

Cited Count:

WoS CC Cited Count:

SCOPUS Cited Count: 1

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 5

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