|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Dynamic Behavior of Materials VIII
||The Mechanical Behaviors and Microstructural Evolution of AZ31B Magnesium Alloy with Gradient Texture under Impact Loading
||Weiliang Zhang, Peijie Li
|On-Site Speaker (Planned)
The impact experiments of AZ31B magnesium alloy with gradient texture were conducted using SHPB and two-stage light gas gun. The residual microstructure was examined to reveal the damage behaviors and energy absorption mechanisms at various impact velocities. It is found that the mechanical responses exhibit both sigmoidal hardening and power-law hardening behaviors at strain rate ranges of 1068/s-5647/s. The strain hardening effect after the impact results from dislocation-dislocation interactions and dislocation-twin interactions. The residual microstructure around the crater is twin zone with gradient density, whereas dynamic recrystallization occurs at higher velocities. The kinetic energy of projectile generated by shock wave is mainly absorbed and exhausted by dynamic recrystallization, crack and twin. Texture examination shows the orientation of dynamic recrystallization zone is the same as the initial texture, which indicates dynamic recrystallization mechanism is continuous dynamic recrystallization.
||Planned: Supplemental Proceedings volume