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Identification of the hardening behavior of solids described by three-parameter Voce law using spherical indentation

Published online by Cambridge University Press:  31 July 2012

Chunyu Zhang  and
Biao Wang
Chunyu Zhang*
Affiliation:
Sino-French Institute of Nuclear Engineering & Technology, Sun Yat-Sen University, Zhuhai, 519082, Guangdong, China
Biao Wang
Affiliation:
Sino-French Institute of Nuclear Engineering & Technology, Sun Yat-Sen University, Zhuhai, 519082, Guangdong, China
*
a)Address all correspondence to this author. e-mail: [email protected]
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Abstract

Methods for identifying the hardening behavior of solids described by power law through indentation testing have been well developed. However, many important engineering materials deviate from the power law description significantly. After fitting the uniaxial curves of several typical materials, the three-parameter relationship proposed by Voce [E. Voce, J. Inst. Met.74, 537–562 (1948)] is chosen to describe the hardening behavior for its fitting performance and inherent simplicity. Based on the Voce law, an efficient method is formulated to extract the hardening data from a single spherical indentation curve. Improved identifying performance is manifested by applying the method to four metallic materials. It is validated that the present method has the ability to effectively identify the plastic properties of materials through spherical indentation testing.

Keywords

hardening behaviorelasto-plasticsaturation stressspherical indentation
Type
Articles
Information
Journal of Materials Research , Volume 27 , Issue 20 , 28 October 2012 , pp. 2624 - 2629
Copyright
Copyright © Materials Research Society 2012

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