Newtonian flow in bulk amorphous alloys

J. Wadsworth; T. G. Nieh

doi:10.1557/proc-601-141

Newtonian flow in bulk amorphous alloys

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

Overview

1 Scopus Citations

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Author(s)

J. Wadsworth
T. G. Nieh

Detail(s)

Original language	English
Pages (from-to)	141-151
Journal / Publication	Materials Research Society Symposium - Proceedings
Volume	601
Publication status	Published - 2000
Externally published	Yes

Conference

Title	The 1999 MRS Fall Meeting - Symposium W 'GaN and Related Alloys'
City	Boston, MA, USA
Period	29 November - 1 December 1999

Link(s)

DOI	DOI https://doi.org/10.1557/proc-601-141 Final Published version
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Link to Scopus	https://www.scopus.com/record/display.uri?eid=2-s2.0-0033718171&origin=recordpage
Permanent Link	https://scholars.cityu.edu.hk/en/publications/publication(67accdc2-ad1c-4148-b485-34b97cbc59f0).html

Abstract

Bulk amorphous alloys have many unique properties, e.g., superior strength and hardness, excellent corrosion resistance, reduced sliding friction and improved wear resistance, and easy formability in a viscous state. These properties, and particularly easy formability, are expected to lead to applications in the fields of near-net-shape fabrication of structural components. Whereas large tensile ductility has generally been observed in the supercooled liquid region in metallic glasses, the exact deformation mechanism, and in particular whether such alloys deform by Newtonian viscous flow, remains a controversial issue. In this paper, existing data are analyzed and an interpretation for the apparent controversy is offered. In addition, new results obtained from an amorphous alloy (composition: Zr-10Al-5Ti-17.9Cu-14.6Ni, in at.%) are presented. Structural evolution during plastic deformation is particularly characterized. It is suggested that the appearance of non-Newtonian behavior is a result of the concurrent crystallization of the amorphous structure during deformation.

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