Sensitivity of Melt Pool Dimensions and Keyhole to Laser Beam Diameter

Authors

  • N. Hassine Laboratory of Mechanical Engineering (LGM), National Engineering School of Monastir, Tunisia (ENIM), University of Monastir, Rue Ibn El Jazzar, 5000 Monastir, Tunisia
  • S. Chatti Laboratory of Mechanical Engineering (LGM), National Engineering School of Monastir, Tunisia (ENIM), University of Monastir, Rue Ibn El Jazzar, 5000 Monastir, Tunisia
  • M. Ben Slama Laboratory of Mechanical Engineering (LGM), National Engineering School of Monastir, Tunisia (ENIM), University of Monastir, Rue Ibn El Jazzar, 5000 Monastir, Tunisia
  • L. Kolsi Department of Mechanical Engineering, College of Engineering, University of Ha’il, Ha’il City 81451, Saudi Arabia & Laboratory of Metrology and Energy Systems, Department of Energy Engineering, University of Monastir, 5000 Monastir, Tunisia

DOI:

https://doi.org/10.35219/awet.2021.04

Keywords:

Laser powder bed fusion, single beads, laser beam diameter, melt pool size, keyhole defect

Abstract

The laser powder bed fusion process has witnessed a huge interest in recent years since it has the potential to produce challenging shapes in a broad range of applications. The process parameters have a considerable effect on melt pool size and on the development of defect porosity. This paper predicts numerically the effect of a large range of laser beam diameters on melt pool dimensions and on the occurrence of porosity defects such as keyhole. A series of single beads of Inconel IN625 was made using various combinations of beam diameters, scan speeds, and laser powers. The use of a large diameter was more suitable rather than a small diameter as it ensures a large and shallow heat affected zone, thus decreasing the development of the keyhole defect. Our numerical results correlate satisfactorily with experimental finding from literature.

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Published

2021-12-31

Issue

Vol. 32 (2021)

Section

Articles

License

Papers accepted for publication become the copyrighted property of the Annals of "Dunarea de Jos" University of Galati, Fascicle XII, Welding Equipment and Technology. No part of the publication may be reproduced or transmitted in any form, or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, except in limited quantities for the non-commercial purposes of scientific or educational advancement, without permission in writing from the Editorial Board.

How to Cite

Sensitivity of Melt Pool Dimensions and Keyhole to Laser Beam Diameter. (2021). Annals of “Dunarea de Jos” University of Galati. Fascicle XII, Welding Equipment and Technology, 32(1), 30-36. https://doi.org/10.35219/awet.2021.04

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