About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
|
Symposium
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30 Years of Nanoindentation with the Oliver-Pharr Method and Beyond
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Presentation Title |
Determining Material Parameters from Nanoindentation Data by Inverse Methods |
Author(s) |
Alexander Hartmaier |
On-Site Speaker (Planned) |
Alexander Hartmaier |
Abstract Scope |
Indentation is a versatile method to assess the hardness of different materials along with their elastic properties. Recently, powerful approaches have been developed to determine material properties like yield-strength, work-hardening rate and even cyclic plastic properties by a combination of indentation testing and computer simulations. The basic idea of these approaches is to iteratively optimize the material parameters in indentation simulations until a minimum in the error between simulation and experiment is achieved. Such inverse methods have been shown to work for macroscopic hardness tests, where the indenter is large compared to the microstructural length scale and for which indentation size effects do not play a significant role. In this work, it is demonstrated that such inverse methods can also be applied to nanoindentation data, even when the microstructural scale is on the order of the nanoindenter scale, if the scale-dependence of the material behavior is properly taken into account. |
Proceedings Inclusion? |
Planned: |
Keywords |
Modeling and Simulation, Mechanical Properties, Characterization |