Abstract
The quantification and visualization of the multi-scale particles and their roles in the deformation response of the ZK60 magnesium alloy are investigated in this study. The three-dimensional (3D) characters of multi-scale second phase particles, including size, shape and distribution, are visualized and quantified using X-ray computed tomography (CT) technology. Results show that rod-shaped Mg4Zn7 particles are only distributed at the submicron scale, while disc-shaped MgZn2 particles are distributed at various scales. 3D finite element structural models, constructed using CT imaging, show competitive effects between submicron Mg4Zn7 particles and micron MgZn2 particles on the plastic deformation. According to the detailed fracture surface analysis, the fracture initiation is observed to occur close to the rod-shaped Mg4Zn7 particles.
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