|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Unlocking the Strengthening Potential of Magnesium Alloys Using Deformation-induced Clustering and Precipitation
||Suhas Eswarappa Prameela, Taisuke Sasaki, Peng Yi, Michael Falk, Timothy Weihs
|On-Site Speaker (Planned)
Light metals of Aluminum (Al) and Magnesium (Mg) hold great promise in many structural applications. However, the overall progress in strengthening these metals has been remarkably different. While significant improvement has been achieved in developing high-strength Al alloys, the anisotropic hexagonal crystal system and complex plasticity mechanisms have made the design of high-strength Mg alloys a challenging exercise. Our recent studies have examined two binary Mg chemistries, mainly the Mg-Al and Mg-Zn systems. These rare-earth-free alloys offer a chance to conduct fundamental studies of precipitation mechanisms and processing pathways that can help alter the nucleation events leading to precipitate formation. We demonstrate that careful control of atomic-scale defects such as dislocations and vacancies can significantly alter the nucleation barrier, promote solute clustering far from and along dislocation lines, along twin boundaries and within twins, and along grain boundaries. These novel microstructures show promise in boosting precipitation strengthening in Mg alloys.
||Magnesium, Phase Transformations, Mechanical Properties