Ductility of an ultrastrong glass-crystal nano-dual-phase alloy in sub- micron

G Wu and JY Zhang and C Liu and Q Wang and J Lu, SCRIPTA MATERIALIA, 183, 17-21 (2020).

DOI: 10.1016/j.scriptamat.2020.03.002

We report an excellent tensile property of the Mg-based nano-dual-phase glass-crystal alloy in sub-micro size. It shows room temperature large ductility (>50% true strain, resulted from the localized necking deformation) with ultrahigh tensile strength (2.4 GPa), compared with 1.4 GPa strength and limited ductility of its metallic glass counterpart. To unraveling the underlying reasons, we have made transmission electron microscope (TEM) in-situ tensile investigation and molecular dynamic (MD) simulation for the materials, showing that homogenous plastic flow of nano-sized metallic glass phase activated by strain non-localization mechanism is responsible for the large ductility. (C) 2020 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

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