PAPERS & REPORTS

Introduce technical papers and reports of IIT (Instrumented Indentation Technology) and correlated fields.

 

Title

Conventional Vickers and true instrumented indentation hardness determined by instrumented indentation tests

Author

Seung-Kyun Kang

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

Ju-Young Kima)

Materials Science, California Institute of Technology, Pasadena, California 91106

Chan-Pyoung Park, Hyun-Uk Kim, and Dongil Kwon

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

Press and Date of publication

(Received 16 September 2009; accepted 18 November 2009)

Abstract

We evaluate Vickers hardness and true instrumented indentation test (IIT) hardness of 24 metals over a wide range of mechanical properties using just IIT parameters by taking into account the real contact morphology beneath the Vickers indenter. Correlating the conventional Vickers hardness, indentation contact morphology, and IIT parameters for the 24 metals reveals relationships between contact depths and apparent material properties. We report the conventional Vickers and true IIT hardnesses measured only from IIT contact depths; these agree well with directly measured hardnesses within ±6% for Vickers hardness and ±10% for true IIT hardness.