|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Magnesium Technology 2018
||Surface and interfacial energies of Mg17Al12-Mg system
||Fangxi Wang, Bin Li
|On-Site Speaker (Planned)
We calculated the surface energies of Mg<SUB>17</SUB>Al<SUB>12</SUB> β-phase with different surface configurations by using molecular dynamic simulations. Surface terminations were carefully selected to calculate the energy of β-phase. The lowest energy surface for each crystallographic plane was determined by varying the surface termination. The results show that surfaces occupied by higher fraction of magnesium atoms generate lower surface energies. The interfacial energy for Mg<SUB>17</SUB>Al<SUB>12</SUB> β-phase and Mg matrix was calculated as well based on the Burger’s orientation relationship. We found that the lowest energy surface of Mg<SUB>17</SUB>Al<SUB>12</SUB> does not generate the lowest interfacial energy. The interfacial energy for Mg<SUB>17</SUB>Al<SUB>12</SUB> β-phase and a (10-12) twin was also calculated. The interfacial energy increases about 250 mJ/m<SUP>2</SUP> for Mg<SUB>17</SUB>Al<SUB>12</SUB> β-phase (011) plane after twinning.