Compressive ductility and fracture resistance in CuZr-based shape-memory metallic-glass composites

Xiaoling Fu; Gang Wang; Yuan Wu; Wenli Song; Chan Hung Shek; Yong Zhang; Jun Shen; Robert O. Ritchie

doi:10.1016/j.ijplas.2020.102687

Author(s)

Xiaoling Fu
Gang Wang
Yuan Wu
Wenli Song
Yong Zhang
Jun Shen

Related Research Unit(s)

Department of Materials Science and Engineering

Detail(s)

Original language	English
Article number	102687
Journal / Publication	International Journal of Plasticity
Volume	128
Online published	4 Feb 2020
Publication status	Published - May 2020

Link(s)

DOI	DOI https://doi.org/10.1016/j.ijplas.2020.102687 Final Published version
	Check@CityULib
Link to Scopus	https://www.scopus.com/record/display.uri?eid=2-s2.0-85081642265&origin=recordpage
Permanent Link	https://scholars.cityu.edu.hk/en/publications/publication(4a15541b-fe31-4041-a05a-471cdf70e119).html

Abstract

The uniaxial compression behavior of Cu_51.5Zr_48.5 shape-memory metallic-glass composites was systematically studied, from the perspective of discerning the salient micro-mechanisms controlling their deformation and fracture. Microstructurally, it was found that the particle size and volume fraction of CuZr precipitates formed in these glasses were highly sensitive to cooling rate and casting environment. Plastic flow was induced by a martensitic transformation of the CuZr particles in these materials, with additional contributions to their inelasticity arising from microcracking and crack deflection, which further served to promote ductility and resist fracture.