The Elastic-Plastic Transition During Nanoindentation of Titanium Nitride

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...

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Bibliographic Details
Published in:Journal of superhard materials 2018-07, Vol.40 (4), p.295-297
Main Authors: Dub, S. N., Belous, V. A., Tolmacheva, G. N., Kaidash, O. N., Lukyanov, A. I., Ushchapovskii, Yu. P.
Format: Article
Language:English
Subjects:
Chemistry
Chemistry and Materials Science
Contact pressure
Dislocation density
Letters to the Editor
Mechanical polishing
Nanoindentation
Physical Chemistry
Plastic properties
Surface layers
Titanium nitride
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Summary: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.
ISSN:1063-4576
1934-9408
DOI:10.3103/S106345761804010X