Study of crack resistance of TiAlN coatings by scratch testing

Abstract

Scratch tests were performed to study failure mechanisms in TiAlN coatings deposited on substrates from steel 12Cr18Ni9Ti. It is shown that coating failure begins with crack generation at the apices of pile-ups formed along the scratch due to plastic ploughing of the substrate material. With further increase in indentation load the failure process is governed by the competition between tensile stresses behind the indenter arising due to friction force and stresses at the contact area periphery due to coating bending under normal load. Substrate pretreatment by Ti ion beams is shown to simultaneously increase the hardness and crack resistance of TiAlN coatings.

Original language	English
Pages (from-to)	185-192
Number of pages	8
Journal	Physical Mesomechanics
Volume	20
Issue number	2
DOIs	https://doi.org/10.1134/S1029959917020084
Publication status	Published - 1 Apr 2017

Keywords

crack resistance
deformation and failure
hard coatings
local surface curvature
scratch testing

ASJC Scopus subject areas

Materials Science(all)
Condensed Matter Physics
Mechanics of Materials
Surfaces and Interfaces

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10.1134/S1029959917020084

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title = "Study of crack resistance of TiAlN coatings by scratch testing",

abstract = "Scratch tests were performed to study failure mechanisms in TiAlN coatings deposited on substrates from steel 12Cr18Ni9Ti. It is shown that coating failure begins with crack generation at the apices of pile-ups formed along the scratch due to plastic ploughing of the substrate material. With further increase in indentation load the failure process is governed by the competition between tensile stresses behind the indenter arising due to friction force and stresses at the contact area periphery due to coating bending under normal load. Substrate pretreatment by Ti ion beams is shown to simultaneously increase the hardness and crack resistance of TiAlN coatings.",

keywords = "crack resistance, deformation and failure, hard coatings, local surface curvature, scratch testing",

author = "Shugurov, {A. R.} and Akulinkin, {A. A.} and Panin, {A. V.} and Sergeev, {V. P.} and Kalashnikov, {M. P.} and Voronov, {A. V.} and Cheng, {C. H.}",

year = "2017",

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doi = "10.1134/S1029959917020084",

language = "English",

volume = "20",

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journal = "Physical Mesomechanics",

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T1 - Study of crack resistance of TiAlN coatings by scratch testing

AU - Shugurov, A. R.

AU - Akulinkin, A. A.

AU - Panin, A. V.

AU - Sergeev, V. P.

AU - Kalashnikov, M. P.

AU - Voronov, A. V.

AU - Cheng, C. H.

PY - 2017/4/1

Y1 - 2017/4/1

N2 - Scratch tests were performed to study failure mechanisms in TiAlN coatings deposited on substrates from steel 12Cr18Ni9Ti. It is shown that coating failure begins with crack generation at the apices of pile-ups formed along the scratch due to plastic ploughing of the substrate material. With further increase in indentation load the failure process is governed by the competition between tensile stresses behind the indenter arising due to friction force and stresses at the contact area periphery due to coating bending under normal load. Substrate pretreatment by Ti ion beams is shown to simultaneously increase the hardness and crack resistance of TiAlN coatings.

AB - Scratch tests were performed to study failure mechanisms in TiAlN coatings deposited on substrates from steel 12Cr18Ni9Ti. It is shown that coating failure begins with crack generation at the apices of pile-ups formed along the scratch due to plastic ploughing of the substrate material. With further increase in indentation load the failure process is governed by the competition between tensile stresses behind the indenter arising due to friction force and stresses at the contact area periphery due to coating bending under normal load. Substrate pretreatment by Ti ion beams is shown to simultaneously increase the hardness and crack resistance of TiAlN coatings.

KW - crack resistance

KW - deformation and failure

KW - hard coatings

KW - local surface curvature

KW - scratch testing

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