Laser based method for surface tension and density measurements for liquid refractory metals (Nb, Ta, and W)
TypeArticles dans des revues avec comité de lecture
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 setup and a technique to estimate the surface tension and the density of several refractory metals (Nb, Ta, and W) and their variation with the temperature. This work is based on the well known sessile droplet method applied in a controlled atmosphere (Ar) and coupled to thermal measurements. The particularity of this work is the acquisition of measurements up to high temperatures (over 3500 K).
Files in this item
Showing items related by title, author, creator and subject.
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, ...
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 ...
Experimental analysis of spatter generation and melt-pool behavior during the powder bed laser beam melting process GUNENTHIRAM, V; PEYRE, P; SCHNEIDER, MATTHIEU; DAL, Morgan; COSTE, Frédéric; KOUTIRI, Imade; FABBRO, Rémy (Elsevier, 2018)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 ...
DAL, Morgan; FABBRO, Rémy (Elsevier, 2016)The work presented in this paper deals with the laser welding simulation. Due to the rise of laser processing in industry, its simulation takes also more and more place. Nevertheless, the physical phenomena occurring are ...
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 ...