Characterizing the Cyclic Behaviour of Extruded AZ31 Magnesium Alloy

Abstract:

In this paper, the mechanical behaviour of extruded AZ31 magnesium alloys under multiaxial fatigue loading conditions is studied. The monotonic properties of the AZ31 magnesium alloy were determined by tests on the specimens which were machined from extruded rods. Then, the cyclic deformation under multiaxial loading conditions was simulated by ANSYS and a plasticity program with the Jiang & Sehitoglu plasticity model. The fatigue lives were estimated by the critical plane models coupled with Coffin-Manson rule, such as Findley, Fatemi-Socie, Brown-Miller, SWT and Liu models. Four loading paths were considered with different levels of non-proportionality, the results show significant loading path dependence.

• Periodical: Materials Science Forum (Volumes 730-732)
• Pages: 727-732
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.730-732.727
• Online since: November 2012
• Authors: Luís G. Reis, Vitor Anes, Bin Li, Manuel de Freitas
• Keywords: Crack Initiation, Magnesium Alloy, Multiaxial Fatigue Damage, Numerical Simulation

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