On two indentation hardness definitions

Zhiyong Li; Y. T. Cheng; Henry T. Yang; S. Chandrasekar

doi:10.1016/S0257-8972(02)00021-X

On two indentation hardness definitions

Zhiyong Li
, Y. T. Cheng
, Henry T. Yang
, S. Chandrasekar

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

40 Scopus citations

Abstract

The difference between the contact area under load and the residual projected area of an indentation after complete unloading has been studied for various materials using finite element and dimensional analyses of cone indentation. The difference in the contact areas gives rise to two hardness values, one based on the contact area under load and another based upon the residual projected area. The effect of sinking-in, piling-up and elastic recovery on the residual contact area has been calculated for materials with different elastic properties and strain hardening characteristics. Based on this study, an estimation procedure is suggested for obtaining a more accurate value of the hardness under load from a measurement of the residual area of an indentation.

Original language	English
Pages (from-to)	124-130
Number of pages	7
Journal	Surface and Coatings Technology
Volume	154
Issue number	2-3
DOIs	https://doi.org/10.1016/S0257-8972(02)00021-X
State	Published - May 15 2002

Bibliographical note

Funding Information:
We would like to thank Professor C.-M. Cheng and Dr. K.C. Taylor for helpful discussions. This research was partially supported by NSF grant DMI-9800920.

Funding

We would like to thank Professor C.-M. Cheng and Dr. K.C. Taylor for helpful discussions. This research was partially supported by NSF grant DMI-9800920.

Funders	Funder number
U.S. Department of Energy Chinese Academy of Sciences Guangzhou Municipal Science and Technology Project Oak Ridge National Laboratory Extreme Science and Engineering Discovery Environment National Science Foundation National Energy Research Scientific Computing Center National Natural Science Foundation of China	DMI-9800920
U.S. Department of Energy Chinese Academy of Sciences Guangzhou Municipal Science and Technology Project Oak Ridge National Laboratory Extreme Science and Engineering Discovery Environment National Science Foundation National Energy Research Scientific Computing Center National Natural Science Foundation of China

Keywords

Contact area
Hardness
Indentation
Pile-up

ASJC Scopus subject areas

General Chemistry
Condensed Matter Physics
Surfaces and Interfaces
Surfaces, Coatings and Films
Materials Chemistry

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10.1016/S0257-8972(02)00021-X

Cite this

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title = "On two indentation hardness definitions",

abstract = "The difference between the contact area under load and the residual projected area of an indentation after complete unloading has been studied for various materials using finite element and dimensional analyses of cone indentation. The difference in the contact areas gives rise to two hardness values, one based on the contact area under load and another based upon the residual projected area. The effect of sinking-in, piling-up and elastic recovery on the residual contact area has been calculated for materials with different elastic properties and strain hardening characteristics. Based on this study, an estimation procedure is suggested for obtaining a more accurate value of the hardness under load from a measurement of the residual area of an indentation.",

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T1 - On two indentation hardness definitions

AU - Li, Zhiyong

AU - Cheng, Y. T.

AU - Yang, Henry T.

AU - Chandrasekar, S.

N1 - Funding Information: We would like to thank Professor C.-M. Cheng and Dr. K.C. Taylor for helpful discussions. This research was partially supported by NSF grant DMI-9800920.

PY - 2002/5/15

Y1 - 2002/5/15

N2 - The difference between the contact area under load and the residual projected area of an indentation after complete unloading has been studied for various materials using finite element and dimensional analyses of cone indentation. The difference in the contact areas gives rise to two hardness values, one based on the contact area under load and another based upon the residual projected area. The effect of sinking-in, piling-up and elastic recovery on the residual contact area has been calculated for materials with different elastic properties and strain hardening characteristics. Based on this study, an estimation procedure is suggested for obtaining a more accurate value of the hardness under load from a measurement of the residual area of an indentation.

AB - The difference between the contact area under load and the residual projected area of an indentation after complete unloading has been studied for various materials using finite element and dimensional analyses of cone indentation. The difference in the contact areas gives rise to two hardness values, one based on the contact area under load and another based upon the residual projected area. The effect of sinking-in, piling-up and elastic recovery on the residual contact area has been calculated for materials with different elastic properties and strain hardening characteristics. Based on this study, an estimation procedure is suggested for obtaining a more accurate value of the hardness under load from a measurement of the residual area of an indentation.

KW - Contact area

KW - Hardness

KW - Indentation

KW - Pile-up

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U2 - 10.1016/S0257-8972(02)00021-X

DO - 10.1016/S0257-8972(02)00021-X

M3 - Article

AN - SCOPUS:0037094343

SN - 0257-8972

VL - 154

SP - 124

EP - 130

JO - Surface and Coatings Technology

JF - Surface and Coatings Technology

IS - 2-3

ER -

On two indentation hardness definitions

Abstract

Bibliographical note

Funding

Keywords

ASJC Scopus subject areas

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