Annealing strengthening in magnesium alloys

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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.