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

D. Wu; J.R. Morris; T.G. Nieh

doi:10.1016/j.scriptamat.2014.09.017

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

D. Wu, J.R. Morris, T.G. Nieh^*

^*Corresponding author for this work

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

47 Citations (Scopus)

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.

Original language	English
Pages (from-to)	52-55
Journal	Scripta Materialia
Volume	94
Online published	1 Oct 2014
DOIs	https://doi.org/10.1016/j.scriptamat.2014.09.017
Publication status	Published - 1 Jan 2015
Externally published	Yes

Research Keywords

Dislocation dynamics
Metallic material
Nanoindentation
Onset of yielding
Tip radius effect

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10.1016/j.scriptamat.2014.09.017

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title = "Effect of tip radius on the incipient plasticity of chromium studied by nanoindentation",

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.",

keywords = "Dislocation dynamics, Metallic material, Nanoindentation, Onset of yielding, Tip radius effect",

author = "D. Wu and J.R. Morris and T.G. Nieh",

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AU - Wu, D.

AU - Morris, J.R.

AU - Nieh, T.G.

PY - 2015/1/1

Y1 - 2015/1/1

N2 - 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.

AB - 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.

KW - Dislocation dynamics

KW - Metallic material

KW - Nanoindentation

KW - Onset of yielding

KW - Tip radius effect

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U2 - 10.1016/j.scriptamat.2014.09.017

DO - 10.1016/j.scriptamat.2014.09.017

M3 - RGC 21 - Publication in refereed journal

SN - 1359-6462

VL - 94

SP - 52

EP - 55

JO - Scripta Materialia

JF - Scripta Materialia

ER -

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

Abstract

Research Keywords

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