|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Magnesium Alloy Development: An LMD Symposium in Honor of Karl Kainer
||Enhancing Impact Toughness of Mg-3%Al-1%Zn Alloy by Grain Structure Modification
||Tomoya Maeda, Naoko Ikeo, Yoshiaki Osawa, Toshiji Mukai
|On-Site Speaker (Planned)
Magnesium alloys have attracted attention to be used as structural components in transportation vehicles due to their low densities. Since crashworthiness against foreign object damage is one of the important properties for the passengers’ safety, damage tolerance was examined for Mg-3%Al-1%Zn alloy by high-speed three-point bending apparatus equipped with a high-speed video camera. In this study, grain size and texture in Mg-Al-Zn alloy were modified by using multi-pass caliber rolling. The rotation sequence of alloys at 90 degrees for each pass possibly reduced the resultant basal texture compared with alloys rotating at 180 degrees due to the difference in repetitive shear deformation. The high-speed three-point bending tests revealed that the rolled alloy exhibited higher impact toughness; i.e. crack propagation speed during the three-point bending was decreased and the absorbed energy was enhanced by the grain structure modification.