Stable flowing of localized shear bands in soft bulk metallic glasses

This paper reports a novel class of Zr–Cu–Fe–Al bulk metallic glasses (BMGs) with high Zr content and unusual deformation behavior. Higher content of Zr results in lower hardness, but favors the generation of highly localized shear bands, even if nanocrystalline phases precipitate in the glassy matr...

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Bibliographic Details
Published in:Acta materialia 2010-02, Vol.58 (3), p.904-909
Main Authors: Zhang, Q.S., Zhang, W., Xie, G.Q., Louzguine-Luzgin, D.V., Inoue, A.
Format: Article
Language:English
Subjects:
Applied sciences
Compression test
Exact sciences and technology
Hardness test
Mechanical properties and methods of testing. Rheology. Fracture mechanics. Tribology
Metallic glasses
Metals. Metallurgy
Plastic deformation
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Summary:This paper reports a novel class of Zr–Cu–Fe–Al bulk metallic glasses (BMGs) with high Zr content and unusual deformation behavior. Higher content of Zr results in lower hardness, but favors the generation of highly localized shear bands, even if nanocrystalline phases precipitate in the glassy matrix. Moreover, flow of the dominant shear band proceeds slowly under compressive stress without rapid shear rupture and facture. The unusual deformation behavior suggests that designing BMG with a high content of solvent element and low hardness might be a promising new way of developing ductile BMG.
ISSN:1359-6454
1873-2453
DOI:10.1016/j.actamat.2009.10.005