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The correlation between indentation hardness and material properties with considering size effect

Published online by Cambridge University Press:  24 June 2014

Zhanwei Yuan Open the ORCID record for Zhanwei Yuan [Opens in a new window] ,
Fuguo Li ,
Bo Chen  and
Fengmei Xue
Zhanwei Yuan*
Affiliation:
State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi’an 710072, China; and School of Materials Science and Engineering, Northwestern Polytechnical University, Xi’an 710072, China
Fuguo Li
Affiliation:
State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi’an 710072, China; and School of Materials Science and Engineering, Northwestern Polytechnical University, Xi’an 710072, China
Bo Chen
Affiliation:
State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi’an 710072, China; and School of Materials Science and Engineering, Northwestern Polytechnical University, Xi’an 710072, China
Fengmei Xue
Affiliation:
State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi’an 710072, China; and School of Materials Science and Engineering, Northwestern Polytechnical University, Xi’an 710072, China
*
a)Address all correspondence to this author. e-mail: yuanyekingfly@163.com
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Abstract

By using a two-dimensional axisymmetric finite element model, the indentation hardness has been studied with different combinations of material properties at different indentation depths. As the forward problem, the testing hardness is not only a function of material properties (E, σy, and n), indenter geometry (half apex angle, indenter shape), and friction, but also relating to the indentation depth. Based on the previous research on size effect, a model of correlation between several indentation experiment parameters (hardness H, maximum load Pm, and loading curvature C) and material properties has been derived. From simulation results, a better fitting result is obtained by the established model. Furthermore, the characteristic length h∗ in Nix/Gao model has been rewritten and discussed with material properties accordingly.

Keywords

indentation hardnessmaterial propertiessize effect

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Type
Articles
Information
Journal of Materials Research , Volume 29 , Issue 12 , 28 June 2014 , pp. 1317 - 1325
Copyright
Copyright © Materials Research Society 2014 

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References

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