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Title:
An Improved Energy Method For Determining Young'S Modulus By Instrumented Indentation Using A Berkovich Tip
Author: Ma DJ; Ong CW; Zhang TH(张泰华)
Source: Journal of Materials Research
Issued Date: 2008
Pages: 2106-2115
Abstract: We previously proposed a method for estimating Young's modulus from instrumented nanoindentation data based on a model assuming that the indenter had a spherical-capped Berkovich geometry to take account of the bluntness effect. The method is now further improved by releasing the constraint on the tip shape, allowing it to have a much broader arbitrariness to range from a conical-tipped shape to a flat-ended shape, whereas the spherical-capped shape is just a special case in between. This method requires two parameters to specify a tip geometry, namely, a volume bluntness ratio V-r and a height bluntness ratio h(r). A set of functional relationships correlating nominal hardness/reduced elastic modulus ratio (H-n/E-r) and elastic work/total work ratio (W-e/W) were established based on dimensional analysis and finite element simulations, with each relationship specified by a set of V-r and h(r). Young's modulus of an indented material can be estimated from these relationships. The method was shown to be valid when applied to S45C carbon steel and 6061 aluminum alloy.
Keyword: Depth-Sensing Indentation ; Elastic-Modulus ; Sharp Indentation ; Elastoplastic Properties ; Anisotropic Materials ; Hardness ; Load ; Indenter
Language: 英语
Indexed Type: SCI
Corresponding Author: Ong, CW (reprint author), Hong Kong Polytech Univ, Dept Appl Phys, Kowloon, Hong Kong, Peoples R China.
Correspondent Email: apacwong@inet.polyu.edu.hk
DOI: 10.1557/JMR.2008.0257
DOC Type: Article
WOS Subject: Materials Science, Multidisciplinary
WOS Subject Extended: Materials Science
WOS Keyword Plus: DEPTH-SENSING INDENTATION ; ELASTIC-MODULUS ; SHARP INDENTATION ; ELASTOPLASTIC PROPERTIES ; ANISOTROPIC MATERIALS ; HARDNESS ; LOAD ; INDENTER
WOS ID: WOS:000258240900010
ISSN: 0884-2914
Citation statistics:
Content Type: 期刊论文
URI: http://dspace.imech.ac.cn/handle/311007/25938
Appears in Collections:力学所知识产出(1956-2008)_期刊论文

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Recommended Citation:
Ma DJ,Ong CW,Zhang TH. An Improved Energy Method For Determining Young'S Modulus By Instrumented Indentation Using A Berkovich Tip[J]. Journal of Materials Research,2008-01-01:2106-2115.
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