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The finite element technique was applied to the study of very complex stress-strain field of thin hard coatings subjected to a nanoindentation process. Berkovich indentation experiments were simulated with the ABAQUS finite element software package. The investigated systems was titanium nitride on high speed steel as an example of a hard film on a softer substrate. The numerical analysis allowed the plastic deformation history during indentation to be followed. It was possible to correlate the onset of plastic deformation in the substrate with the shape of the loading curve. The system was simulated by an axisymmetric model in which the conical indenter has the same contact area as the Berkovich indenter. A six-fold symmetric three-dimensional model was also defined for testing the suitability of the previous model. Comparison between the experimental data and numerical results demonstrated that the finite element approach is capable of reproducing the loading-unloading behaviour of a nanoindentation test.

Additional information

Authors: LICHINCHI M, JRC Ispra (IT);LENARDI C, JRC Ispra (IT);HAUPT J, JRC Ispra (IT);VITALI R, HKS Italia, Milano (IT)
Bibliographic Reference: Article: Thin Solid Films
Record Number: 199710688 / Last updated on: 1997-06-10
Original language: en
Available languages: en