CHARACTERISATION OF DIE CAST MAGNESIUM ALLOYS FOR AUTOMOTIVE POWER TRAIN COMPONENTS

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A new group of magnesium die casting alloys has recently been developed for fabricating automotive power train components. While these alloys exhibit good tensile yield strength at both ambient and elevated (100-200°C) temperatures, they are prone to excessive creep deformation when exposed to moderate levels of loads at temperatures above 125°C. The aim of this project is to characterise microstructures of these alloys subjected to controlled levels of creep deformation in the temperature and stress regime of interests, with a view to identifying microstructural factors that are important in determining the creep resistance of die cast magnesium alloys. The outcome of this project will provide useful guidelines for further improvements in creep resistance of these alloys and development of new die cast alloys with higher creep resistance at elevated temperatures.