|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Advanced Characterization Techniques for Quantifying and Modeling Deformation
||Significant Disparity of Deformation Behavior in Hot-rolled Highly-textured Mg and Mg-3Al-1Zn Alloy under Tension
||Kelvin Yu Xuan Xie, Dexin Zhao
|On-Site Speaker (Planned)
||Kelvin Yu Xuan Xie
In this work, we deformed hot-rolled highly-textured pure Mg and AZ31 samples with similar initial microstructures under tension along the rolling direction. Apparent shear banding was only observed in the pure Mg samples from the early stage of the deformation. Systematic tilting experiments with transmission electron micropscopy and statistical analyses of multiple grains at different strain levels revealed a significant disparity of non-basal dislocation activities between pure Mg and AZ31. For pure Mg, <c+a> dislocations were activated since the early stage of plastic deformation. For AZ31, <c+a> dislocations were mostly absent at all strain levels, even in the strain-to-failure samples. Non-basal <a> dislocations, including prismatic and pyramidal <a> dislocations, were observed. The promotion of the non-basal <a> dislocation activities and the suppression of <c+a> dislocations in AZ31 are expected to offer more sustainable hardening, which could elucidate the absence of apparent shear banding and much-improved ductility in AZ31.