Effect of tip radius on the incipient plasticity of chromium studied by nanoindentation

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)52-55
Journal / PublicationScripta Materialia
Volume94
Online published1 Oct 2014
Publication statusPublished - 1 Jan 2015
Externally publishedYes

Abstract

The onset of plasticity in Cr was investigated by nanoindentation using indenters with tip radii ranging from 60 to 759 nm. The stress for incipient plasticity was found to increase with decreasing tip radius. The cumulative pop-in probability on load could be described successfully by a combined model over the full range of tip radius, indicating that the incipient plasticity might be triggered either by the homogeneous nucleation of dislocation or by the activation of existing dislocations underneath the indenter.

Research Area(s)

  • Dislocation dynamics, Metallic material, Nanoindentation, Onset of yielding, Tip radius effect