Annealing strengthening in magnesium alloys

该项目旨在开发新的知识，为具有更均匀机械性能的轻质镁锻造合金的设计提供信息。为提高燃料效率而开发的镁挤压合金存在拉伸-压缩屈服强度不对称的问题：它们在拉伸下很强，但在压缩下较弱，因此限制了它们在高强度应用中的使用。最近发现的一种异常的镁挤压合金退火强化现象为解决这一问题提供了重要的机会。该项目计划使用先进的实验技术，包括高分辨率电子显微镜，以揭示这种退火强化现象的机制。研究结果可能为开发下一代镁变形合金提供科学依据。

The project seeks to develop new knowledge to inform the design of lightweight magnesium wrought alloys with more uniform mechanical properties. Magnesium extrusion alloys developed for improved fuel efficiency suffer from a tension–compression yield strength asymmetry problem: they are strong under tension but weaker under compression, thus limiting their use in high-strength applications. An unusual annealing strengthening phenomenon of magnesium extrusion alloys was recently discovered that offers a significant opportunity to solve this problem. This project plans to use advanced experimental techniques, including high-resolution electron microscopy to reveal the mechanisms underlying this annealing strengthening phenomenon. The outcomes are likely to form the scientific basis for developing next-generation magnesium wrought alloys.