Influence of indenter tip roundness on hardness behavior in nanoindentation

Weimin Chen; Min Li; Taihua Zhang; Yang Tse Cheng; Che Min Cheng

doi:10.1016/j.msea.2006.09.050

Influence of indenter tip roundness on hardness behavior in nanoindentation

Weimin Chen, Min Li, Taihua Zhang, Yang Tse Cheng, Che Min Cheng

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

43 Scopus citations

Abstract

In this paper, the effect of indenter tip roundness on hardness behavior for two typical elastic perfectly plastic materials is studied by means of finite element simulation. A rigid conical indenter of semi apex angle 70.3° fitted smoothly with a spherical tip is employed. It is shown that as the indentation depth increases hardness first rises from zero, reaches a maximum and then decreases slowly approaching asymptotically the limiting value equal to that due to a conical indenter of ideally sharp tip. The range within which hardness varies appreciably is comparable to the radius of the indenter tip. The difference between the maximum value and the limiting value depends on the yield stress over the Young's modulus ratio. The smaller this ratio the greater the difference is. Numerical simulation also provides an opportunity for checking the accuracy and limitations of the widely used Oliver-Pharr method.

Original language	English
Pages (from-to)	323-327
Number of pages	5
Journal	Materials Science and Engineering: A
Volume	445-446
DOIs	https://doi.org/10.1016/j.msea.2006.09.050
State	Published - Feb 15 2007

Bibliographical note

Funding Information:
The authors would like to acknowledge the support from the National Science Foundation of China, project nos. 10372101 and 10432050.

Funding

The authors would like to acknowledge the support from the National Science Foundation of China, project nos. 10372101 and 10432050.

Funders	Funder number
National Natural Science Foundation of China (NSFC)	10432050, 10372101

Keywords

Indentation size effect
Indenter tip roundness
The Oliver-Pharr method

ASJC Scopus subject areas

General Materials Science
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

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10.1016/j.msea.2006.09.050

Cite this

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title = "Influence of indenter tip roundness on hardness behavior in nanoindentation",

abstract = "In this paper, the effect of indenter tip roundness on hardness behavior for two typical elastic perfectly plastic materials is studied by means of finite element simulation. A rigid conical indenter of semi apex angle 70.3° fitted smoothly with a spherical tip is employed. It is shown that as the indentation depth increases hardness first rises from zero, reaches a maximum and then decreases slowly approaching asymptotically the limiting value equal to that due to a conical indenter of ideally sharp tip. The range within which hardness varies appreciably is comparable to the radius of the indenter tip. The difference between the maximum value and the limiting value depends on the yield stress over the Young's modulus ratio. The smaller this ratio the greater the difference is. Numerical simulation also provides an opportunity for checking the accuracy and limitations of the widely used Oliver-Pharr method.",

keywords = "Indentation size effect, Indenter tip roundness, The Oliver-Pharr method",

author = "Weimin Chen and Min Li and Taihua Zhang and Cheng, {Yang Tse} and Cheng, {Che Min}",

note = "Funding Information: The authors would like to acknowledge the support from the National Science Foundation of China, project nos. 10372101 and 10432050. ",

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T1 - Influence of indenter tip roundness on hardness behavior in nanoindentation

AU - Chen, Weimin

AU - Li, Min

AU - Zhang, Taihua

AU - Cheng, Yang Tse

AU - Cheng, Che Min

N1 - Funding Information: The authors would like to acknowledge the support from the National Science Foundation of China, project nos. 10372101 and 10432050.

PY - 2007/2/15

Y1 - 2007/2/15

N2 - In this paper, the effect of indenter tip roundness on hardness behavior for two typical elastic perfectly plastic materials is studied by means of finite element simulation. A rigid conical indenter of semi apex angle 70.3° fitted smoothly with a spherical tip is employed. It is shown that as the indentation depth increases hardness first rises from zero, reaches a maximum and then decreases slowly approaching asymptotically the limiting value equal to that due to a conical indenter of ideally sharp tip. The range within which hardness varies appreciably is comparable to the radius of the indenter tip. The difference between the maximum value and the limiting value depends on the yield stress over the Young's modulus ratio. The smaller this ratio the greater the difference is. Numerical simulation also provides an opportunity for checking the accuracy and limitations of the widely used Oliver-Pharr method.

AB - In this paper, the effect of indenter tip roundness on hardness behavior for two typical elastic perfectly plastic materials is studied by means of finite element simulation. A rigid conical indenter of semi apex angle 70.3° fitted smoothly with a spherical tip is employed. It is shown that as the indentation depth increases hardness first rises from zero, reaches a maximum and then decreases slowly approaching asymptotically the limiting value equal to that due to a conical indenter of ideally sharp tip. The range within which hardness varies appreciably is comparable to the radius of the indenter tip. The difference between the maximum value and the limiting value depends on the yield stress over the Young's modulus ratio. The smaller this ratio the greater the difference is. Numerical simulation also provides an opportunity for checking the accuracy and limitations of the widely used Oliver-Pharr method.

KW - Indentation size effect

KW - Indenter tip roundness

KW - The Oliver-Pharr method

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JO - Materials Science and Engineering: A

JF - Materials Science and Engineering: A

ER -

Influence of indenter tip roundness on hardness behavior in nanoindentation

Abstract

Bibliographical note

Funding

Keywords

ASJC Scopus subject areas

Access to Document

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