About this Abstract |
Meeting |
2025 TMS Annual Meeting & Exhibition
|
Symposium
|
Additive Manufacturing Modeling, Simulation and Machine Learning
|
Presentation Title |
Implementation of alloy-specific thermo-fluid modelling for designing Mg alloys suitable for laser powder-bed fusion |
Author(s) |
Seyed Mohammad Mehdi Hoseini Athar, Mikael Ersson, Peter Hedström |
On-Site Speaker (Planned) |
Seyed Mohammad Mehdi Hoseini Athar |
Abstract Scope |
Multi-physics thermo-fluid modeling has great potential as a reliable tool for material design, where minor changes in material-related parameters must be accurately captured. In this research, first, a thermo-fluid computational flow dynamics (CFD) model is developed and validated against experimental data. Then, the effect of some material properties, i.e., saturated vapor pressure, viscosity, and solidification range on the melt pool dynamics in pure Mg and commercial ZK60 and WE43 Mg alloys are investigated. It is found that a higher saturated vapor pressure, leads to a deeper more unstable keyhole, and keyhole-induced porosity and evaporation loss. Higher viscosity and wider solidification range cause non-uniform temperature and velocity distribution on the keyhole walls, leading to keyhole instability and formation of defects. This study suggests an approach to investigate the effect of materials-related parameters on melting and solidification, which can be extremely helpful for design of new alloys suitable for L-PBF. |
Proceedings Inclusion? |
Planned: |
Keywords |
Computational Materials Science & Engineering, Additive Manufacturing, Magnesium |