The Elastic-Plastic Transition During Nanoindentation of Titanium Nitride

S. N. Dub; V. A. Belous; G. N. Tolmacheva; O. N. Kaidash; A. I. Lukyanov; Yu. P. Ushchapovskii

doi:10.3103/S106345761804010X

The Elastic-Plastic Transition During Nanoindentation of Titanium Nitride

Authors: Dub S.N.¹, Belous V.A.², Tolmacheva G.N.², Kaidash O.N.¹, Lukyanov A.I.³, Ushchapovskii Y.P.¹
Affiliations:
1. Bakul Institute for Superhard Materials
2. National Science Center “Kharkiv Institute of Physics and Technology”
3. Frantsevich Institute for Problems of Materials Science
Issue: Vol 40, No 4 (2018)
Pages: 295-297
Section: Letters to the Editor
URL: https://journals.rcsi.science/1063-4576/article/view/186296
DOI: https://doi.org/10.3103/S106345761804010X
ID: 186296

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Abstract

The onset of plasticity during nanodeformation of a bulk TiN specimen is studied by the nanoindentation. It is shown that with a high density of dislocations in the specimen surface layer (mechanical polishing) plasticity in TiN initiates smoothly under an average contact pressure of 18.1 GPa. Hence, with a spherical approximation of the Berkovich tip, the yield strength of TiN at the nanoscale is determined to be 14.5 GPa.