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Crack Investigation of the Multilayer TiN/Ti Coatings during the Nanoindentation Test

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Abstract:

Nanoindentation test is one of the most commonly used methods for the strength investigation of the nanomaterials. Information provided from such test gives the possibility to obtain a knowledge about fracture development under the spot hitting tool. However, nano dimensions of the coatings obtained by the deposition method creates problems with exact investigation of this test. Costs of experimental study are very often excessive due to very specialized laboratory equipment. The numerical simulations can be a support for mentioned experimental research as they give possibility of fast and efficient investigation on behavior of different nanolayers dimensions and alignments. The main aim of this work is focused on taking into account real morphology of microstructure of ceramic TiN layers deposited on the metallic Ti layers during nanoindentation test. This combination of layers is widely used in medicine for improvement mechanical properties and biocompatibility behavior of bio elements. Particular attention during numerical simulation is put on influence of columnar structure of these layers on fracture development. Results obtained from the extended finite element model (XFEM) for various nanolayers alignments is discussed according to the fracture initiation and propagation.

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Periodical:

Key Engineering Materials (Volumes 504-506)

Pages:

1293-1298

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.504-506.1293

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Online since:

February 2012

Authors:

Konrad Perzynski, Łukasz Madej

Keywords:

Extended Finite Element Method (XFEM), Fracture, Nanoindentation, Nanolayers

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© 2012 Trans Tech Publications Ltd. All Rights Reserved

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