|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Strengthening Mechanisms and Thermal Stability of MgLiCa Alloys Processed by Severe Plastic Deformation
||Heather Salvador, Suveen N. Mathaudhu
|On-Site Speaker (Planned)
||Suveen N. Mathaudhu
Magnesium-Lithium alloys have long been investigated for their potential to realized ultralightweight structural materials, however efforts have been limited by a combination of low strength and thermal stability at low homologous temperatures. We report the implementation of severe plastic deformation (specifically, high-pressure torsion (HPT)) to refine the grains structures of Mg-3.5Li-0.6Ca (wt%) alloy to the sub-micrometer regime via the imposition of variable hydrostatic pressure and strain. The grain refinement results in increased hardness and strength while Mg2Ca nanoprecipitates further strengthen the alloy and hinder grain boundary movement at elevated temperatures. Recrystallization curves as a function of strain applied during HPT with concurrent microstructural and strength/hardness evolution are reported and compared with literature reports of deformation processed MgLi alloys.
||Magnesium, Shaping and Forming, Mechanical Properties