Materials hardness estimation by simulation of the indentation process
|Maciej M. Spychalski , Krzysztof J. Kurzydlowski|
Warsaw University of Technology, Faculty of Materials Science and Engineering (InMat), Wołoska 141, Warszawa 02-507, Poland
In the present study Finite Element Method (FEM) has been applied for modelling of indentation process in polycrystalline metals. Two different model of the material, with linear and non-linear hardening, has been assumed in calculations. The indentation process has been quantitatively described by a load-depth curves. The hardness values were obtained from the unloading part of such curves, which are responsible for plastic deformation of the material during indentation process. In addition, the geometry changes of the indent after deformation has been analyzed.
The results show that simulation techniques, used in the present study, are useful in estimation of materials hardness. It has been also found that specific combination of materials properties such as hardening exponent, hardening coefficient, tangent modulus and yield stress may result in sink-in or pile-up phenomenon. This processes may influence the indent geometry and hardness measurements consequently.
Presentation: Poster at E-MRS Fall Meeting 2006, Symposium H, by Maciej M. Spychalski
See On-line Journal of E-MRS Fall Meeting 2006
Submitted: 2006-05-15 15:57 Revised: 2009-06-07 00:44