Superplasticity in a bulk amorphous Pd-40Ni-20P alloy : A compression study

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

Detail(s)

Original languageEnglish
Pages (from-to)1191-1195
Journal / PublicationIntermetallics
Volume10
Issue number11-12
Publication statusPublished - Nov 2002
Externally publishedYes

Abstract

Compressive deformation behavior of a cast Pd40Ni40P20 bulk metallic glass in the supercooled liquid region (589-670 K) was investigated at strain rates ranging from 10-4 to 10-2 s-1. The material exhibited excellent mechanical formability in the supercooled liquid region. However, in contrast to a Newtonian behavior generally observed in oxide glasses, the present alloy also showed a non-Newtonian behavior, depending upon the temperature and applied strain rate. Specifically, the alloy is like a Newtonian fluid at high temperatures, but becomes non-Newtonian at low temperatures and high strain rates. Structures of the amorphous material, both before and after deformation, were examined using X-ray diffraction and high-resolution transmission electron microscopy. The non-Newtonian behavior is proposed to be associated with the glass instability during deformation. © 2002 Elsevier Science Ltd. All rights reserved.

Research Area(s)

  • B. Glasses, metallic, Mechanical properties at high temperatures, Phase transformations, Superplastic behaviour, Thermal stability

Bibliographic Note

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Citation Format(s)

Superplasticity in a bulk amorphous Pd-40Ni-20P alloy : A compression study. / Chu, J. P.; Chiang, C. L.; Nieh, T. G.; Kawamura, Y.

In: Intermetallics, Vol. 10, No. 11-12, 11.2002, p. 1191-1195.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review