TY - CONF A1 - Griepentrog, Michael T1 - Instrumented Indentation Testing (IIT) - A critical journey from the very first steps to the modern state of the art N2 - Nowadays the Instrumented Indentation Testing (IIT), in the nano range often named as nano indention, is one of the most commonly used methods to determine the mechanical properties of materials in the micro and nano range. This method is already extensive standardized in DIN EN ISO 14577 part 1-4. In the past, the application of this standard in testing praxis shows that the established values have an excellent precision. On the other side, the trueness as comparability of obtained results with reference values is not so good. To improve accuracy of IIT the use of a variable ε and the consideration of the lateral displacement during indentation became normative requirements during the last revision of ISO 14577. Starting with the beginning of instrumented indentation testing in 1898 the historical background and the main assumption of the Oliver and Pharr method will be explained and critical discussed. It will be shown how to apply the use of a variable ε and the consideration of the lateral displacement during indentation in the daily testing work to improve accuracy of IIT. Finally, ongoing standardization projects in the field of IIT will be briefly presented. T2 - Advanced nano-mechanical techniques for academic and industrial research. MML Conference and Workshop CY - Warwick, UK DA - 13.12.2017 KW - ISO 14577 KW - Instrumented Indentation Testing KW - Nanoindentation KW - IIT KW - Mechanical properties KW - Variable epsilon KW - Lateral displacement PY - 2017 AN - OPUS4-43466 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -