Research output: Contribution to conference › Conference article › Scientific
Abstract
Surface coatings, like titanium nitride (TiN) and
diamond-like carbon (DLC) coatings offer high wear
resistance and low friction performance for a wide range
of applications. By using new techniques like modelling
and simulation, the coating performance under load can be
estimated and thus provide valuable information for the
coating design and for the use of coatings in different
applications.
A three dimensional Finite Element Method (3D FEM) model
has been developed for calculating both the first
principal stress distribution and the true stress
components in the scratch test contact as the spherical
diamond tip is moving with increased load on a titanium
nitride (TiN) and diamond-like carbon (DLC) coated steel
surface. The three dimensional model is comprehensive in
the sense that it considers elastic, plastic and fracture
behaviour of the contacting surfaces. Three main regions
of stress concentration during the scratching action has
been identified and analysed.
The first cracks to appear on the surface of a high speed
steel sample coated with a 2 ìm TiN coating or 1 ìm DLC
coating are angular cracks on the edge of the scratch
channel as the spherical diamond tip is sliding on the
coated surface. This corresponds to the area of high two
directional stresses occurring at the side of the scratch
channel. By identifying the location of the first crack
and the crack density along the scratch channel and by
using this as input data the fracture toughness of the
coating can be evaluated. The influence of the coating
thickness and elastic modulus on the stresses and strains
generated during the sliding process is demonstrated.
title = "Coated surface design by modelling and simulation",
abstract = "Surface coatings, like titanium nitride (TiN) and diamond-like carbon (DLC) coatings offer high wear resistance and low friction performance for a wide range of applications. By using new techniques like modelling and simulation, the coating performance under load can be estimated and thus provide valuable information for the coating design and for the use of coatings in different applications. A three dimensional Finite Element Method (3D FEM) model has been developed for calculating both the first principal stress distribution and the true stress components in the scratch test contact as the spherical diamond tip is moving with increased load on a titanium nitride (TiN) and diamond-like carbon (DLC) coated steel surface. The three dimensional model is comprehensive in the sense that it considers elastic, plastic and fracture behaviour of the contacting surfaces. Three main regions of stress concentration during the scratching action has been identified and analysed. The first cracks to appear on the surface of a high speed steel sample coated with a 2 {\`i}m TiN coating or 1 {\`i}m DLC coating are angular cracks on the edge of the scratch channel as the spherical diamond tip is sliding on the coated surface. This corresponds to the area of high two directional stresses occurring at the side of the scratch channel. By identifying the location of the first crack and the crack density along the scratch channel and by using this as input data the fracture toughness of the coating can be evaluated. The influence of the coating thickness and elastic modulus on the stresses and strains generated during the sliding process is demonstrated.",
keywords = "ProperTune",
author = "Helena Ronkainen and Kenneth Holmberg and Anssi Laukkanen",
year = "2006",
language = "English",
note = "3rd Mikkeli International Industrial Coating Seminar, MIICS 2006, MIICS 2006 ; Conference date: 16-03-2006 Through 18-03-2006",
2006. Paper presented at 3rd Mikkeli International Industrial Coating Seminar, MIICS 2006, Mikkeli, Finland.
Research output: Contribution to conference › Conference article › Scientific
TY - CONF
T1 - Coated surface design by modelling and simulation
AU - Ronkainen, Helena
AU - Holmberg, Kenneth
AU - Laukkanen, Anssi
PY - 2006
Y1 - 2006
N2 - Surface coatings, like titanium nitride (TiN) and
diamond-like carbon (DLC) coatings offer high wear
resistance and low friction performance for a wide range
of applications. By using new techniques like modelling
and simulation, the coating performance under load can be
estimated and thus provide valuable information for the
coating design and for the use of coatings in different
applications.
A three dimensional Finite Element Method (3D FEM) model
has been developed for calculating both the first
principal stress distribution and the true stress
components in the scratch test contact as the spherical
diamond tip is moving with increased load on a titanium
nitride (TiN) and diamond-like carbon (DLC) coated steel
surface. The three dimensional model is comprehensive in
the sense that it considers elastic, plastic and fracture
behaviour of the contacting surfaces. Three main regions
of stress concentration during the scratching action has
been identified and analysed.
The first cracks to appear on the surface of a high speed
steel sample coated with a 2 ìm TiN coating or 1 ìm DLC
coating are angular cracks on the edge of the scratch
channel as the spherical diamond tip is sliding on the
coated surface. This corresponds to the area of high two
directional stresses occurring at the side of the scratch
channel. By identifying the location of the first crack
and the crack density along the scratch channel and by
using this as input data the fracture toughness of the
coating can be evaluated. The influence of the coating
thickness and elastic modulus on the stresses and strains
generated during the sliding process is demonstrated.
AB - Surface coatings, like titanium nitride (TiN) and
diamond-like carbon (DLC) coatings offer high wear
resistance and low friction performance for a wide range
of applications. By using new techniques like modelling
and simulation, the coating performance under load can be
estimated and thus provide valuable information for the
coating design and for the use of coatings in different
applications.
A three dimensional Finite Element Method (3D FEM) model
has been developed for calculating both the first
principal stress distribution and the true stress
components in the scratch test contact as the spherical
diamond tip is moving with increased load on a titanium
nitride (TiN) and diamond-like carbon (DLC) coated steel
surface. The three dimensional model is comprehensive in
the sense that it considers elastic, plastic and fracture
behaviour of the contacting surfaces. Three main regions
of stress concentration during the scratching action has
been identified and analysed.
The first cracks to appear on the surface of a high speed
steel sample coated with a 2 ìm TiN coating or 1 ìm DLC
coating are angular cracks on the edge of the scratch
channel as the spherical diamond tip is sliding on the
coated surface. This corresponds to the area of high two
directional stresses occurring at the side of the scratch
channel. By identifying the location of the first crack
and the crack density along the scratch channel and by
using this as input data the fracture toughness of the
coating can be evaluated. The influence of the coating
thickness and elastic modulus on the stresses and strains
generated during the sliding process is demonstrated.
KW - ProperTune
M3 - Conference article
T2 - 3rd Mikkeli International Industrial Coating Seminar, MIICS 2006