The effect of indenter angle on the microindentation hardness

J. Qin; Y. Huang; K. C. Hwang; J. Song; G. M. Pharr

doi:10.1016/j.actamat.2007.07.016

The effect of indenter angle on the microindentation hardness

J. Qin, Y. Huang^*, K. C. Hwang, J. Song, G. M. Pharr

^*Corresponding author for this work

Civil and Environmental Engineering

Research output: Contribution to journal › Article › peer-review

39 Scopus citations

Abstract

Nix and Gao established an important relation between the microindentation hardness and indentation depth. It agrees well with the microindentation experiments for the Berkovich indenter. However, it is unclear whether it holds for other indenters with different indenter angles. We use the conventional theory of mechanism-based strain gradient plasticity established from the Taylor dislocation model to study the effect of indenter angles on the microindentation hardness. It is shown that the Nix-Gao relation between the microindentation hardness and indentation depth also holds for other indenter angles. The effect of friction is negligible for relatively flat indenters (e.g. Berkovich indenter), but may be significant for sharp indenters (e.g. cubic indenter).

Original language	English (US)
Pages (from-to)	6127-6132
Number of pages	6
Journal	Acta Materialia
Volume	55
Issue number	18
DOIs	https://doi.org/10.1016/j.actamat.2007.07.016
State	Published - Oct 2007

Funding

Y.H. acknowledges the support from NSF (Grant # CMS-0084980) and ONR (Grant # N00014-01-1-0205, program officer Dr. Y.D.S. Rajapakse). The support from NSFC is also acknowledged.

Keywords

Berkovich indenter
Indenter angle
Microindentation hardness
Strain gradient
Taylor dislocation model

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Ceramics and Composites
Polymers and Plastics
Metals and Alloys

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10.1016/j.actamat.2007.07.016

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title = "The effect of indenter angle on the microindentation hardness",

abstract = "Nix and Gao established an important relation between the microindentation hardness and indentation depth. It agrees well with the microindentation experiments for the Berkovich indenter. However, it is unclear whether it holds for other indenters with different indenter angles. We use the conventional theory of mechanism-based strain gradient plasticity established from the Taylor dislocation model to study the effect of indenter angles on the microindentation hardness. It is shown that the Nix-Gao relation between the microindentation hardness and indentation depth also holds for other indenter angles. The effect of friction is negligible for relatively flat indenters (e.g. Berkovich indenter), but may be significant for sharp indenters (e.g. cubic indenter).",

keywords = "Berkovich indenter, Indenter angle, Microindentation hardness, Strain gradient, Taylor dislocation model",

author = "J. Qin and Y. Huang and Hwang, {K. C.} and J. Song and Pharr, {G. M.}",

note = "Funding Information: Y.H. acknowledges the support from NSF (Grant # CMS-0084980) and ONR (Grant # N00014-01-1-0205, program officer Dr. Y.D.S. Rajapakse). The support from NSFC is also acknowledged. ",

year = "2007",

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doi = "10.1016/j.actamat.2007.07.016",

language = "English (US)",

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pages = "6127--6132",

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T1 - The effect of indenter angle on the microindentation hardness

AU - Qin, J.

AU - Huang, Y.

AU - Hwang, K. C.

AU - Song, J.

AU - Pharr, G. M.

N1 - Funding Information: Y.H. acknowledges the support from NSF (Grant # CMS-0084980) and ONR (Grant # N00014-01-1-0205, program officer Dr. Y.D.S. Rajapakse). The support from NSFC is also acknowledged.

PY - 2007/10

Y1 - 2007/10

N2 - Nix and Gao established an important relation between the microindentation hardness and indentation depth. It agrees well with the microindentation experiments for the Berkovich indenter. However, it is unclear whether it holds for other indenters with different indenter angles. We use the conventional theory of mechanism-based strain gradient plasticity established from the Taylor dislocation model to study the effect of indenter angles on the microindentation hardness. It is shown that the Nix-Gao relation between the microindentation hardness and indentation depth also holds for other indenter angles. The effect of friction is negligible for relatively flat indenters (e.g. Berkovich indenter), but may be significant for sharp indenters (e.g. cubic indenter).

AB - Nix and Gao established an important relation between the microindentation hardness and indentation depth. It agrees well with the microindentation experiments for the Berkovich indenter. However, it is unclear whether it holds for other indenters with different indenter angles. We use the conventional theory of mechanism-based strain gradient plasticity established from the Taylor dislocation model to study the effect of indenter angles on the microindentation hardness. It is shown that the Nix-Gao relation between the microindentation hardness and indentation depth also holds for other indenter angles. The effect of friction is negligible for relatively flat indenters (e.g. Berkovich indenter), but may be significant for sharp indenters (e.g. cubic indenter).

KW - Berkovich indenter

KW - Indenter angle

KW - Microindentation hardness

KW - Strain gradient

KW - Taylor dislocation model

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JO - Acta Materialia

JF - Acta Materialia

IS - 18

ER -

The effect of indenter angle on the microindentation hardness

Abstract

Funding

Keywords

ASJC Scopus subject areas

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