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Experimental verification for an instrumented spherical indentation technique in determining mechanical properties of metallic materials

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Abstract

A spherical indentation-based method and its numerical verification, which is capable of identifying the plastic properties, have been respectively provided by our previous work [P. Jiang, et al., J. Mater. Res.24, 1045 (2009)] and [T. Zhang, et al., J. Mater. Res.24, 3653 (2009)]. To examine its effectiveness for practical application, 10 typical metals were selected to perform experimental verifications. Here, the above method was used in combination with the Oliver–Pharr model to avoid its dependence on the previously known elastic modulus. To obtain reliable results, a reasonable calibration has been performed for the used spherical tip with imperfect shape. Finally, the present verification has shown that the deviations of yield strength and elastic modulus obtained from the indentation tests are at most 40% but are generally within 25%. And the effect of the difference in constitutive relationships between the ideal model and the actual material on the accuracy of the indentation-based method has also been illustrated.

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Acknowledgment

We acknowledge the support of the National Natural Science Foundation of China (Grant Nos. 11025212 and 10872200).

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Authors and Affiliations

  1. National Astronomical Observatories, Chinese Academy of Sciences, Beijing, 100012, China

    Peng Jiang

  2. State Key Laboratory of Nonlinear Mechanics (LNM), Institute of Mechanics, Chinese Academy of Sciences, Beijing, 100190, China

    Taihua Zhang & Rong Yang

Authors
  1. Peng Jiang
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  2. Taihua Zhang
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  3. Rong Yang
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Correspondence to Taihua Zhang.

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Jiang, P., Zhang, T. & Yang, R. Experimental verification for an instrumented spherical indentation technique in determining mechanical properties of metallic materials. Journal of Materials Research 26, 1414–1420 (2011). https://doi.org/10.1557/jmr.2011.51

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  • DOI: https://doi.org/10.1557/jmr.2011.51

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