Despite promise as a lightweight structural and armor material, widespread adoption of Mg alloys remains limited. For instance, the highly anisotropic properties, arising both from the fundamental deformation mechanisms and strong texture developed during processing of wrought Mg products, result in poor performance under ballistic loading. In an effort to improve the impact performance, a novel pre-compression process was developed to introduce twins into a rolled AZ31B plate. Through sequential compression along plate transverse direction (TD) and rolling direction (RD) the resistance to penetration by a 0.30-cal fragment simulating projectile, as characterized by its V50, was increased by 13% offering equivalent protection of a plate 16% heavier than the pre-twinned plate. In addition, the dominant failure mechanism was found to change from discing to ductile hole growth. Through examination of the pre-compressed microstructures and microhardness measurements the origins of the improved performance were identified as the introduction of stable twins.

尽管有望成为轻质结构和装甲材料，但镁合金的广泛采用仍然有限。例如，由基本变形机制和锻造镁产品加工过程中形成的强织构产生的高度各向异性特性导致在弹道载荷下性能不佳。为了提高冲击性能，开发了一种新颖的预压缩工艺，将孪晶引入轧制的 AZ31B 板。通过沿钢板横向 (TD) 和滚动方向 (RD) 的连续压缩，0.30 cal 碎片模拟弹丸的穿透阻力（以 V50 为特征）增加了 13%，提供了相当于比重量重 16% 的钢板的保护预孪晶板。此外，发现主要的破坏机制从盘状孔增长转变为韧性孔增长。通过对预压缩微观结构和显微硬度测量的检查，确定性能改进的起源是稳定孪晶的引入。