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Contact morphology and constitutive equation in evaluating tensile properties of austenitic stainless steels through instrumented spherical indentation

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Abstract

We evaluate representative stress and strain of austenitic stainless steels using instrumented indentation tests with a spherical indenter by taking into account the real contact depth and effective radius. We investigate the relation between material pileup underneath the spherical indenter and the strain-hardening exponent in uniaxial tensile tests for these steels. We evaluate the suitability of three constitutive equations, the Hollomon, Ludwigson, and Swift equations, for describing linear-type strain-hardening of austenitic stainless steels. Using the real contact depth and effective radii developed for the austenitic stainless steels, we find good agreement between representative stress and strain in instrumented indentation and uniaxial tensile tests.

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Acknowledgements

This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MEST) (0417-20110083).

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Authors and Affiliations

  1. Department of Materials Science and Engineering, Seoul National University, Seoul, 151-744, Korea

    Young-Cheon Kim, Seung-Kyun Kang & Dongil Kwon

  2. School of Mechanical and Advanced Materials Engineering, UNIST, Ulsan, 689-798, Korea

    Ju-Young Kim

Authors
  1. Young-Cheon Kim
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  2. Seung-Kyun Kang
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  3. Ju-Young Kim
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  4. Dongil Kwon
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Corresponding author

Correspondence to Ju-Young Kim.

Additional information

Young-Cheon Kim and Seung-Kyun Kang contributed equally to this study.

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Kim, YC., Kang, SK., Kim, JY. et al. Contact morphology and constitutive equation in evaluating tensile properties of austenitic stainless steels through instrumented spherical indentation. J Mater Sci 48, 232–239 (2013). https://doi.org/10.1007/s10853-012-6733-3

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  • DOI: https://doi.org/10.1007/s10853-012-6733-3

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