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

Ge Wu; Jiayong Zhang; Chang Liu; Qing Wang; Jian Lu

doi:10.1016/j.scriptamat.2020.03.002

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Detail(s)

Original language	English
Pages (from-to)	17-21
Journal / Publication	Scripta Materialia
Volume	183
Online published	18 Mar 2020
Publication status	Published - 1 Jul 2020

Link(s)

DOI	DOI https://doi.org/10.1016/j.scriptamat.2020.03.002 Final Published version
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Link to Scopus	https://www.scopus.com/record/display.uri?eid=2-s2.0-85081957186&origin=recordpage
Permanent Link	https://scholars.cityu.edu.hk/en/publications/publication(8eeb8686-6a29-4ea0-a3bb-7cfbb492fce2).html

Abstract

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.