Pronounced nanoindentation creep deformation in Cu-doped CoFe-based metallic glasses

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

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Author(s)

  • C.C. Yuan
  • Z.W. Lv
  • C.M. Pang
  • W.W. Zhu
  • B.L. Shen

Related Research Unit(s)

Detail(s)

Original languageEnglish
Pages (from-to)246-253
Journal / PublicationJournal of Alloys and Compounds
Volume806
Early online date19 Jul 2019
Publication statusPublished - 25 Oct 2019

Abstract

By using nanoindentation techniques combined with atomic force microscopy, a pronounced creep behavior at ambient temperature as demonstrated by small creeping stress exponents was observed in (Co0·7Fe0.3)0.68B0·219Si0·051Nb0.05 metallic glass with 0.5 at.% Cu addition. Such obvious creep deformation is due to the precipitation of Co(Fe)-rich clusters induced by the chemical effect of Cu. It promotes the formation of the weakly bonded structure and thereby the generation of plenty of excess free volume during the nucleation and propagation of multiple shear bands in the process of deformation, which contributes to a steady creep behavior and large plasticity. Our work provides a microscopic understanding of creep behaviors in Cu-doped metallic glasses, which might also guide for improving the plasticity of these alloys.

Research Area(s)

  • Deformation, Disordered structures, Metallic glasses, Plasticity and creep

Citation Format(s)

Pronounced nanoindentation creep deformation in Cu-doped CoFe-based metallic glasses. / Yuan, C.C.; Lv, Z.W.; Pang, C.M.; Zhu, W.W.; Wang, Xun-Li; Shen, B.L.

In: Journal of Alloys and Compounds, Vol. 806, 25.10.2019, p. 246-253.

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