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Experimental analysis of spatter generation and melt-pool behavior during the powder bed laser beam melting process

Type
Articles dans des revues sans comité de lecture
Auteur
GUNENTHIRAM, V
86289 Laboratoire Procédés et Ingénierie en Mécanique et Matériaux [PIMM]
PEYRE, P
86289 Laboratoire Procédés et Ingénierie en Mécanique et Matériaux [PIMM]
SCHNEIDER, MATTHIEU
86289 Laboratoire Procédés et Ingénierie en Mécanique et Matériaux [PIMM]
DAL, Morgan
86289 Laboratoire Procédés et Ingénierie en Mécanique et Matériaux [PIMM]
COSTE, Frédéric
86289 Laboratoire Procédés et Ingénierie en Mécanique et Matériaux [PIMM]
KOUTIRI, Imade
86289 Laboratoire Procédés et Ingénierie en Mécanique et Matériaux [PIMM]
FABBRO, Rémy
86289 Laboratoire Procédés et Ingénierie en Mécanique et Matériaux [PIMM]

URI
http://hdl.handle.net/10985/13281
DOI
10.1016/j.jmatprotec.2017.08.012
Date
2018
Journal
Journal of Materials Processing Technology

Résumé

The experimental analysis of spatter formation was carried out on an instrumented SLM set-up allowing the quantification of spatter ejections and possible correlation with melt-pool behavior. Considering nearly similar SLM conditions than those carried out on SLM machines, an increase of large spatters (>80 μm) with volume energy density (VED) was clearly demonstrated on a 316L stainless steel, which was attributed to the recoil pressure applied on the melt-pool by the metal vaporization and the resulting high velocity vapor plume. In a second step, much lower spattering was shown on Al-12Si powder beds than on 316L ones. Fast camera analysis of powder beds indicated that droplet formation was mostly initiated in the powder-bed near the melt-pool interface. On Al-12 Si alloys, such droplets were directly incorporated in the MP without being ejected upwards as spatters like on 316L. Last, it was shown that a strong reduction of spattering was possible even on 316L, with the use of low VED combined with larger spots (≈0.5 mm), allowing to melt sufficiently deep layers in conduction regime and ensure adequate dilution between layers.

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Nom:
PIMM -JMPT-GUNENTHIRAM-2018.pdf
Taille:
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Format:
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Fin d'embargo:
2018-07-01
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Documents liés

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  • Analysis of laser–melt pool–powder bed interaction during the selective laser melting of a stainless steel 
    GUNENTHIRAM, Valérie; PEYRE, Patrice; SCHNEIDER, Matthieu; DAL, Morgan; COSTE, Frédéric; FABBRO, Rémy (Laser Institute of America, 2017)
    The laser powder bed fusion (LPBF) or powder-bed additive layer manufacturing process is now recognized as a high-potential manufacturing process for complex metallic parts. However, many technical issues are still to ...
  • Analysis and possible estimation of keyhole depths evolution, using laser operating parameters and material properties 
    FABBRO, Rémy; DAL, Morgan; PEYRE, Patrice; COSTE, Frédéric; SCHNEIDER, Matthieu; GUNENTHIRAM, V (Laser Institute of America, 2018)
    The authors propose an analysis of the effect of various operating parameters on the keyhole depth during laser welding. The authors have developed a model that uses the analysis of the thermal field obtained in 2D geometry, ...
  • Laser based method for surface tension and density measurements for liquid refractory metals (Nb, Ta, and W) 
    DAL, Morgan; COSTE, Frédéric; SCHNEIDER, Matthieu; BOLIS, Riccardo; FABBRO, Rémy (Laser Institute of America, 2019)
    The increase of process simulations in industry leads to the need of accurate knowledge of material thermal properties. As the determination of liquid metal properties is quite difficult, this article presents an experimental ...
  • Influence of gas atmosphere (Ar or He) on the laser powder bed fusion of a Ni-based alloy 
    TRAORE, S.; SCHNEIDER, M.; KOUTIRI, I.; COSTE, F.; FABBRO, R.; CHARPENTIER, C.; LEFEBVRE, P.; PEYRE, P. (ELSEVIER, 2021)
    The gaseous atmosphere plays a major role in the quality of the manufactured parts in Laser Powder Bed Fusion (L-PBF) by protecting the metal from high temperature oxidation. If argon and nitrogen are the most commonly ...
  • Laser-induced plume investigated by finite element modelling and scaling of particle entrainment in laser powder bed fusion 
    MAYI, Yaasin; DAL, Morgan; PEYRE, Patrice; BELLET, Michel; METTON, Charlotte; MORICONI, Clara; FABBRO, Remy (IOP Publishing, 2019)
    Although metal vaporisation has been observed in several laser processes such as drilling or welding, vapour plume expansion and its induced side effects are not fully understood. Especially, this phenomenon is garnering ...

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