|About this Abstract
||2021 TMS Annual Meeting & Exhibition
||Magnesium Technology 2021
||Quasi-static and Dynamic Rate Mechanical Behavior and Microstructural Investigation of High-purity Mg and AZ31B Alloy
||Benjamin M. Morrow, Ellen K. Cerreta, Saryu J. Fensin, Sara J Perez-Bergquist, Carl P. Trujillo, Suveen N. Mathaudhu, Veronica Anghel, Rodney J. McCabe, George T. Gray
|On-Site Speaker (Planned)
||Benjamin M. Morrow
High-purity Mg and Mg AZ31B alloy were tested under quasi-static and dynamic strain rate conditions to examine the evolution of microstructure during deformation. EBSD is used to quantify the relative activity of mechanisms under various loading conditions, especially with respect to slip and twinning. Orientation had a large effect on strain rate sensitivity and twinning activity in both pure and alloyed Mg. Samples were also tested in a shear-loading configuration to examine microstructural evolution under these conditions. Adiabatic shear bands were not observed in high-purity Mg specimens. Deformation bands were observed in AZ31B, though slip was the dominant mechanism, likely due to adiabatic heating during deformation.
Additionally, several efforts have used in situ straining TEM, and HRTEM to study individual defects and defect interactions during and after deformation (especially twin-twin and twin-dislocation) at the nano-scale, which can have a considerable effect on both dislocation and twin mobility.
||Magnesium, Mechanical Properties, Characterization