|About this Abstract
||2021 TMS Annual Meeting & Exhibition
||Additive Manufacturing of Metals: Applications of Solidification Fundamentals
||LPBF Processing of the Al-Ni Eutectic Alloy: Experiments and Phase Field Simulations
||Guillaume Boussinot, Markus Apel, Markus Döring
|On-Site Speaker (Planned)
We study experimentally and using phase field simulations the Laser Powder Bed Fusion (LPBF) processing of the eutectic Al-Ni alloy. Varying the alloy composition, we investigate the mechanisms leading to a coupled two-phases eutectic solidification or to a single phase solidification. While at low cooling rates the eutectic solidification has been the subject of an extensive work since the 90's, we find new phenomena arising at the large cooling rates that are typical for additive manufacturing and especially for LPBF. These new phenomena are, in line with the strongly out-of-equilibrium regime identified in our previous publication [Phys. Rev. Applied 11, 014025 (2019)], the expression of a eutectic Peclet number (eutectic spacing over diffusion length) and of a dendritic Peclet number (tip radius over diffusion length) of order unity.