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- W2969691034 abstract "Strain heterogeneity at the microstructural level plays a vital role in the deformation and fracture behaviour of dual or multi-phase materials. In the present work, the strain heterogeneity, localization and partitioning arising at the sub-micron scale during elevated temperature (170 °C) tensile deformation of an Mg-5Al-3Ca alloy was investigated using quasi in-situ {mu}-DIC experiments. The results reveal that the strain is mainly carried by the {alpha}-Mg phase, while the intermetallic Laves phase plays a critical role in that strain concentrations build up at the {alpha}-Mg matrix and Laves phase interfaces, hence, reducing the overall deformability of the alloy. In quasi in-situ and bulk material analysis at elevated temperature, cracks were observed to nucleate in the Laves phase, at i) the intersection points of slip lines in the {alpha}-Mg matrix with the Laves phase and ii) the twin intersections with {alpha}-Mg/Laves phase interfaces and iii) twin transmissions across {alpha}-Mg/Laves phase interfaces. Euler number analysis has shown that the (inter-)connectivity of the Laves phase decreases with deformation. Finally, cracks grow preferentially along the Laves phases until the material fractures." @default.
- W2969691034 created "2019-08-29" @default.
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- W2969691034 date "2019-08-22" @default.
- W2969691034 modified "2023-09-27" @default.
- W2969691034 title "Strain heterogeneity and micro-damage nucleation under tensile stresses in an Mg-5Al-3Ca alloy with an intermetallic skeleton" @default.
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