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Analysis of Ball-indentation Load-depth Data: Part I. Determining Elastic Modulus

Published online by Cambridge University Press:  31 January 2011

B. Taljat ,
T. Zacharia  and
F. M. Haggag
B. Taljat
Affiliation:
Oak Ridge National Laboratory, Metals and Ceramics Division, Oak Ridge, Tennessee 37831–6140
T. Zacharia
Affiliation:
Oak Ridge National Laboratory, Metals and Ceramics Division, Oak Ridge, Tennessee 37831–6140
F. M. Haggag
Affiliation:
Oak Ridge National Laboratory, Metals and Ceramics Division, Oak Ridge, Tennessee 37831–6140
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Abstract

Analysis of ball-indentation process was made by the finite element (FE) method. A series of indentation FE analyses were made on materials with different elastic modulus (E), and a simple relationship between E and the load-depth (F-h) unloading data is presented. In order to check for the influence of other material properties, thorough research has been performed, introducing a combination of response surface (RS) and FE analysis. As a result, a relationship between the indentation unloading slope, E, and the strain hardening exponent was derived. Also, the indenter compliance effect has been investigated. The indenter compliance correction was calculated and applied to the experimentally measured F-h results. Experimental testing was made on three materials with essentially different elastic moduli. Comparison of the results obtained by newly developed equations with the results from other well-known equations is also presented.

Type
Articles
Information
Journal of Materials Research , Volume 12 , Issue 4 , April 1997 , pp. 965 - 974
Copyright
Copyright © Materials Research Society 1997

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