Mechanical properties and deformation behaviour of high-pressure die-cast magnesium-aluminium based alloys.

Ang, H 2017, Mechanical properties and deformation behaviour of high-pressure die-cast magnesium-aluminium based alloys., Doctor of Philosophy (PhD), Engineering, RMIT University.


Document type: Thesis
Collection: Theses

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Title Mechanical properties and deformation behaviour of high-pressure die-cast magnesium-aluminium based alloys.
Author(s) Ang, H
Year 2017
Abstract Due to the low-density and high-specific strength, magnesium alloys are expected to enjoy increasing use in automotive and aerospace industries. However, relative to aluminium alloys, the applications of die-cast magnesium alloys remain limited, mainly due to their inadequate mechanical properties. The research presented here provided a better understanding of the deformation behaviour of die-cast magnesium alloys. This research demonstrates that the deformation behaviour of die-cast magnesium-aluminium based alloys can be separated into four stages. Decomposition of stress-strain curve into these different stages has provided insights into the improved measurement of proof strength, the role of aluminium solute in moderating strain-rate sensitivity, the interactions of slip and twinning deformation systems to understand total anelasticity and the contributions of different slip and twinning deformation mechanisms to the overall deformation behaviour.

This research is a milestone in developing understanding of the deformation mechanisms in die-cast magnesium alloys and will provide the foundation for future development of improved structural alloys.
Degree Doctor of Philosophy (PhD)
Institution RMIT University
School, Department or Centre Engineering
Subjects Solid Mechanics
Numerical Modelling and Mechanical Characterisation
Metals and Alloy Materials
Keyword(s) High-pressure die-casting
Magnesium alloys
Deformation behaviour
Mechanical properties
Strain-rate sensitivity
Constitutive modelling
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Created: Thu, 07 Dec 2017, 12:09:44 EST by Denise Paciocco
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