Effect of residual stresses on nanoindentation creep behavior of Zr-based bulk metallic glasses

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)58-62
Journal / PublicationIntermetallics
Volume41
Online published21 May 2013
Publication statusPublished - Oct 2013
Externally publishedYes

Abstract

The effect of residual stresses on the time-dependent deformation of a bulk metallic glass is investigated by the nanoindentation technique. In order to induce residual stresses, a beam sample was elastically bent and constrained in a steel ring. The upper side of the beam experiences the tensile residual stress, the lower side the compressive residual stress, and the central line nearly nil stress. Afterward, nanoindentation creep tests were performed on this stressed sample at room temperature. The creep rate is apparently higher on the tensile side, and remains lower and nearly fixed on the compressive side. The data were analyzed using the viscoelasticity iso-strain Kevin model. Individual strain contributions from anelasticity and creep were evaluated. The behavior can be explained by the joint influence of the residual stress and indention loading.

Research Area(s)

  • B. Creep (properties and mechanisms), B. Glasses, metallic, E. Mechanical properties, theory, F. Residual stress measurement