Published in BIO Web of Conferences
Integrating experiment and simulation provides invaluable insights into the critical parameters that determine the microstructure of alloys produced by additive manufacturing. Here, the grain structure formation due to solidification during single pass laser scans (mimicking bead-on-plate single tracks) on a 316L stainless steel is studied in situ ...
Isomorphic Inoculation (ISI) is a novel grain refinement technique during solidification by the addition of metallic powders to the melt rather than ceramics. The powders are designed to grow epitaxially rather than to nucleate new solid, increasing theoretically the ratio between solidified grains and inoculants to 1:1. This technique circumvents ...
Published in IOP Conference Series: Earth and Environmental Science
Thermal energy storage technologies have been widely used to mitigate intermittency from renewable energy such as solar energy. Phase change material (PCM) is a certain material that can be used as a heat storage medium and is available in a wide range of operating temperatures. Molten salt is one of the PCMs that has the advantage of a very high o...
The growth of dendritic grains during solidification is often modelled using the Grain EnvelopeModel (GEM), in which the envelope of the dendrite is an interface tracked by the Phase FieldInterface Capturing (PFIC) method. In the PFIC method, an phase-field equation is solved ona fixed mesh to track the position of the envelope. While being versati...
Le modèle de simulation numérique appelé CA-FE, permet de simuler la structure de grains obtenue lors du procédé de fabrication additive par fusion laser sur lit de poudre (L-PBF). Le modèle CA-FE chaîne deux calculs : la simulation des champs de températures au cours du procédé par Éléments Finis (FE : Finite Element), puis de la solidification de...
This paper presents a very fast numerical approach to simulate microstructures resulting from melt pool solidification including growth competition of columnar dendritic grains, and equiaxed grains nucleated from the melt. To reduce computation time, an upscaling strategy is proposed, which instead of considering each dendrite individually consists...
A generalized model for the kinetics of a dendrite tip with a non-equilibrium interface is presented for multicomponent alloys. The model includes full coupling with thermodynamic databases to account for non-dilute non-ideal solutions, in addition to a full diffusion matrix in the liquid. The consequences of the computed non-equilibrium phase diag...
This paper presents a very fast numerical approach to simulate microstructures resulting from melt pool solidification including growth competition of columnar dendritic grains, and equiaxed grains nucleated from the melt. To reduce computation time, the key contribution is the development of an upscaling strategy, which instead of considering each...
Ce manuscrit porte sur l’interaction entre les phénomènes de solidification et le mouvement de lignes de contact dans le contexte plus général de la solidification d’écoulements capillaires. Au delà de leur élégance esthétique, ces phénomènes sont d’une importance capitale dans différents domaines industriels, tels que le givrage des aéronefs, les ...
