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Effective indenter radius and frame compliance in instrumented indentation testing using a spherical indenter

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Abstract

We introduce a novel method to correct for imperfect indenter geometry and frame compliance in instrumented indentation testing with a spherical indenter. Effective radii were measured directly from residual indentation marks at various contact depths (ratio of contact depth to indenter radius between 0.1 and 0.9) and were determined as a function of contact depth. Frame compliance was found to depend on contact depth especially at small indentation depths, which is successfully explained using the concept of an extended frame boundary. Improved representative stress-strain values as well as hardness and elastic modulus were obtained over the entire contact depth.

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Authors and Affiliations

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

    Seung-Kyun Kang, Ingeun Kang & Dongil Kwon

  2. Materials Science, California Institute of Technology, Pasadena, California, 91106, USA

    Ju-Young Kim

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  1. Seung-Kyun Kang
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  3. Ingeun Kang
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Correspondence to Ju-Young Kim.

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Kang, SK., Kim, JY., Kang, I. et al. Effective indenter radius and frame compliance in instrumented indentation testing using a spherical indenter. Journal of Materials Research 24, 2965–2973 (2009). https://doi.org/10.1557/jmr.2009.0358

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