Tribological performance of coated surfaces

Kenneth Holmberg, Anssi Laukkanen

Research output: Contribution to journalArticleScientificpeer-review

1 Citation (Scopus)

Abstract

The fundamentals of coating tribology is presented in a generalised holistic approach to friction and wear mechanisms of coated surfaces in dry sliding contacts. It is based on a classification of the tribological contact process into macromechanical, micromechanical, tribochemical contact mechanisms and material transfer. The tribological contact process is dominated by the macromechanical mechanisms, which have been systematically analysed by using four main parameters: the coating-to-substrate hardness relationship, the film thickness, the surface roughness and the debris in the contact. In this paper special attention is given to the microlevel mechanisms, and in particular new techniques for modelling the elastic, plastic and brittle behaviour of the surface by finite element (FEM) computer simulations. The contact condition with a sphere sliding over a plate coated with a very thin hard coating is analysed. A three dimensional FEM model has been developed for calculating the first principal stress distribution in the scratch tester contact of a diamond spherical tip moving with increased load on a 2 µm thick titanium nitride (TiN) coated steel surface. The model is comprehensive in that sense that it considers elastic, plastic and fracture behaviour of the contact surfaces. By identifying from a scratch experiment the location of the first crack and using this as input data can the fracture toughness of the coating be determined.
Original languageEnglish
Pages (from-to)20-27
Number of pages8
JournalCailiao Rechuli Xuebao/Transactions of Materials and Heat Treatment
Volume25
Issue number5
Publication statusPublished - 2004
MoE publication typeA1 Journal article-refereed

Fingerprint

coatings
Coatings
plastics
Plastics
sliding contact
tribology
Hard coatings
Diamond
Titanium nitride
titanium nitrides
Tribology
Steel
fracture strength
test equipment
debris
Debris
stress distribution
Film thickness
sliding
Stress concentration

Keywords

  • hard coatings
  • FEM modelling
  • stress simulation
  • coating fracture
  • ProperTune

Cite this

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title = "Tribological performance of coated surfaces",
abstract = "The fundamentals of coating tribology is presented in a generalised holistic approach to friction and wear mechanisms of coated surfaces in dry sliding contacts. It is based on a classification of the tribological contact process into macromechanical, micromechanical, tribochemical contact mechanisms and material transfer. The tribological contact process is dominated by the macromechanical mechanisms, which have been systematically analysed by using four main parameters: the coating-to-substrate hardness relationship, the film thickness, the surface roughness and the debris in the contact. In this paper special attention is given to the microlevel mechanisms, and in particular new techniques for modelling the elastic, plastic and brittle behaviour of the surface by finite element (FEM) computer simulations. The contact condition with a sphere sliding over a plate coated with a very thin hard coating is analysed. A three dimensional FEM model has been developed for calculating the first principal stress distribution in the scratch tester contact of a diamond spherical tip moving with increased load on a 2 µm thick titanium nitride (TiN) coated steel surface. The model is comprehensive in that sense that it considers elastic, plastic and fracture behaviour of the contact surfaces. By identifying from a scratch experiment the location of the first crack and using this as input data can the fracture toughness of the coating be determined.",
keywords = "hard coatings, FEM modelling, stress simulation, coating fracture, ProperTune",
author = "Kenneth Holmberg and Anssi Laukkanen",
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journal = "Cailiao Rechuli Xuebao/Transactions of Materials and Heat Treatment",
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Tribological performance of coated surfaces. / Holmberg, Kenneth; Laukkanen, Anssi.

In: Cailiao Rechuli Xuebao/Transactions of Materials and Heat Treatment, Vol. 25, No. 5, 2004, p. 20-27.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Tribological performance of coated surfaces

AU - Holmberg, Kenneth

AU - Laukkanen, Anssi

N1 - Project code: G3SU00194

PY - 2004

Y1 - 2004

N2 - The fundamentals of coating tribology is presented in a generalised holistic approach to friction and wear mechanisms of coated surfaces in dry sliding contacts. It is based on a classification of the tribological contact process into macromechanical, micromechanical, tribochemical contact mechanisms and material transfer. The tribological contact process is dominated by the macromechanical mechanisms, which have been systematically analysed by using four main parameters: the coating-to-substrate hardness relationship, the film thickness, the surface roughness and the debris in the contact. In this paper special attention is given to the microlevel mechanisms, and in particular new techniques for modelling the elastic, plastic and brittle behaviour of the surface by finite element (FEM) computer simulations. The contact condition with a sphere sliding over a plate coated with a very thin hard coating is analysed. A three dimensional FEM model has been developed for calculating the first principal stress distribution in the scratch tester contact of a diamond spherical tip moving with increased load on a 2 µm thick titanium nitride (TiN) coated steel surface. The model is comprehensive in that sense that it considers elastic, plastic and fracture behaviour of the contact surfaces. By identifying from a scratch experiment the location of the first crack and using this as input data can the fracture toughness of the coating be determined.

AB - The fundamentals of coating tribology is presented in a generalised holistic approach to friction and wear mechanisms of coated surfaces in dry sliding contacts. It is based on a classification of the tribological contact process into macromechanical, micromechanical, tribochemical contact mechanisms and material transfer. The tribological contact process is dominated by the macromechanical mechanisms, which have been systematically analysed by using four main parameters: the coating-to-substrate hardness relationship, the film thickness, the surface roughness and the debris in the contact. In this paper special attention is given to the microlevel mechanisms, and in particular new techniques for modelling the elastic, plastic and brittle behaviour of the surface by finite element (FEM) computer simulations. The contact condition with a sphere sliding over a plate coated with a very thin hard coating is analysed. A three dimensional FEM model has been developed for calculating the first principal stress distribution in the scratch tester contact of a diamond spherical tip moving with increased load on a 2 µm thick titanium nitride (TiN) coated steel surface. The model is comprehensive in that sense that it considers elastic, plastic and fracture behaviour of the contact surfaces. By identifying from a scratch experiment the location of the first crack and using this as input data can the fracture toughness of the coating be determined.

KW - hard coatings

KW - FEM modelling

KW - stress simulation

KW - coating fracture

KW - ProperTune

M3 - Article

VL - 25

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JO - Cailiao Rechuli Xuebao/Transactions of Materials and Heat Treatment

JF - Cailiao Rechuli Xuebao/Transactions of Materials and Heat Treatment

SN - 1009-6264

IS - 5

ER -