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Solid-Liquid Interface Velocity of Aluminum System in MD Simulation

Jordan Sutton
Department of Materials Science & Engineering, University of Tennessee

Additive manufacturing powder-bed fusion processes share properties of welding mechanics, in particular the heat cycling of a melting pool. For metal AM processes, the main parameters of interest are the temperature gradient and the solid-liquid interface velocity. This simulation models the melt pool in an aluminum system weld. The simulation space is 97.2 x 32.4 x 32.4 3 and is divided into three equal regions. The two regions at either end are held in the solid phase, while the middle region is brought to the liquid phase at a higher temperature. The entire system is then recombined and lowered from above the melting temperature to below. The interface can be seen moving through the liquid phase as it solidifies. 1

Interactive Structures

Color Legend:

  • Aluminum = brown


1. H Men and Z Fan, "Molecular dynamic simulation of the atomic structure of aluminum solid-liquid interfaces", Mater. Res. Express, Vol 1, Number 2, (2014), doi: 10.1088/2053-1591/1/2/025705

Posted: April 2018.