Toward New Magnesium Alloy Design - Theoretical and Experimental Studies of the Influence of Alloying Elements on Deformation Twinning.

摘要

In this report, we summarize the research that has been accomplished under the sponsorship of the Army Research Office (W911NF-12-1-0023). Ab initio calculations have been performed to study the effects of solute atoms on the c/a ratio of magnesium alloys. Atomistic simulations have also been performed to investigate the interaction between a Mg17Al12 precipitate and a (10-12). twin boundary, interactions between a Mg17A112 precipitate and the basal slip and the prismatic slip have been performed as well. In addition, experiments of deformation behavior of an AZ91 Mg alloy heat-treated under different conditions have been conducted. More calculations and simulations, and systematic experimental studies are needed to obtain conclusive data. Some of the results are summarized in this report.