Tribological contact analysis of a rigid ball sliding on a hard coated surface: Part III: Fracture toughness calculation and influence of residual stresses

Anssi Laukkanen, Henrik Holmberg (Corresponding Author), Jari Koskinen, Helena Ronkainen, Kim Wallin, Simo Varjus

    Research output: Contribution to journalArticleScientificpeer-review

    46 Citations (Scopus)

    Abstract

    The surface fracture mechanisms, that are the origin to wear, were analysed by three-dimensional finite element method (FEM) modelling on micro-level by stress and strain computer simulations and by experimental studies with a scratch tester. The studied tribological contact was a diamond ball sliding with increasing load on a thin titanium nitride (TiN) coating on a steel substrate. The ball was modelled as rigid, the coating linearly elastic and the steel substrate elastic–plastic taking into account strain hardening effects. In a sliding contact the first crack is initiated at the top of the coating from bending and pulling actions and it grows down through the coating. The effect of initial residual stress fields on coating cracking was approached by carrying out stress simulations with a pre-stressed coating. The stress fields near the indenter were found to relax by plastic deformation to such extent that the remaining stresses had only a marginal effect to macroscopic behavior. Fracture mechanical evaluation of crack driving force and fracture toughness were performed by determining stress intensity factor (SIF) solutions using boundary element analysis. SIF solutions were evaluated for crack fields of different density, location, crack angle, type of loading and mode of loading. The results were utilized to evaluate fracture characteristics and compute fracture toughness for the TiN to high speed steel coating substrate system.
    Original languageEnglish
    Pages (from-to)3824-3844
    Number of pages21
    JournalSurface and Coatings Technology
    Volume200
    Issue number12-13
    DOIs
    Publication statusPublished - 2006
    MoE publication typeA1 Journal article-refereed

    Fingerprint

    fracture strength
    residual stress
    sliding
    balls
    Fracture toughness
    Residual stresses
    coatings
    Coatings
    cracks
    Steel
    stress intensity factors
    titanium nitrides
    Cracks
    steels
    Titanium nitride
    stress distribution
    Stress intensity factors
    Substrates
    sliding contact
    Insulator Elements

    Keywords

    • surface coatings
    • stress modelling
    • fracture
    • scratch tester
    • fracture toughness
    • residual stresses
    • ProperTune

    Cite this

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    title = "Tribological contact analysis of a rigid ball sliding on a hard coated surface: Part III: Fracture toughness calculation and influence of residual stresses",
    abstract = "The surface fracture mechanisms, that are the origin to wear, were analysed by three-dimensional finite element method (FEM) modelling on micro-level by stress and strain computer simulations and by experimental studies with a scratch tester. The studied tribological contact was a diamond ball sliding with increasing load on a thin titanium nitride (TiN) coating on a steel substrate. The ball was modelled as rigid, the coating linearly elastic and the steel substrate elastic–plastic taking into account strain hardening effects. In a sliding contact the first crack is initiated at the top of the coating from bending and pulling actions and it grows down through the coating. The effect of initial residual stress fields on coating cracking was approached by carrying out stress simulations with a pre-stressed coating. The stress fields near the indenter were found to relax by plastic deformation to such extent that the remaining stresses had only a marginal effect to macroscopic behavior. Fracture mechanical evaluation of crack driving force and fracture toughness were performed by determining stress intensity factor (SIF) solutions using boundary element analysis. SIF solutions were evaluated for crack fields of different density, location, crack angle, type of loading and mode of loading. The results were utilized to evaluate fracture characteristics and compute fracture toughness for the TiN to high speed steel coating substrate system.",
    keywords = "surface coatings, stress modelling, fracture, scratch tester, fracture toughness, residual stresses, ProperTune",
    author = "Anssi Laukkanen and Henrik Holmberg and Jari Koskinen and Helena Ronkainen and Kim Wallin and Simo Varjus",
    year = "2006",
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    }

    Tribological contact analysis of a rigid ball sliding on a hard coated surface : Part III: Fracture toughness calculation and influence of residual stresses. / Laukkanen, Anssi; Holmberg, Henrik (Corresponding Author); Koskinen, Jari; Ronkainen, Helena; Wallin, Kim; Varjus, Simo.

    In: Surface and Coatings Technology, Vol. 200, No. 12-13, 2006, p. 3824-3844.

    Research output: Contribution to journalArticleScientificpeer-review

    TY - JOUR

    T1 - Tribological contact analysis of a rigid ball sliding on a hard coated surface

    T2 - Part III: Fracture toughness calculation and influence of residual stresses

    AU - Laukkanen, Anssi

    AU - Holmberg, Henrik

    AU - Koskinen, Jari

    AU - Ronkainen, Helena

    AU - Wallin, Kim

    AU - Varjus, Simo

    PY - 2006

    Y1 - 2006

    N2 - The surface fracture mechanisms, that are the origin to wear, were analysed by three-dimensional finite element method (FEM) modelling on micro-level by stress and strain computer simulations and by experimental studies with a scratch tester. The studied tribological contact was a diamond ball sliding with increasing load on a thin titanium nitride (TiN) coating on a steel substrate. The ball was modelled as rigid, the coating linearly elastic and the steel substrate elastic–plastic taking into account strain hardening effects. In a sliding contact the first crack is initiated at the top of the coating from bending and pulling actions and it grows down through the coating. The effect of initial residual stress fields on coating cracking was approached by carrying out stress simulations with a pre-stressed coating. The stress fields near the indenter were found to relax by plastic deformation to such extent that the remaining stresses had only a marginal effect to macroscopic behavior. Fracture mechanical evaluation of crack driving force and fracture toughness were performed by determining stress intensity factor (SIF) solutions using boundary element analysis. SIF solutions were evaluated for crack fields of different density, location, crack angle, type of loading and mode of loading. The results were utilized to evaluate fracture characteristics and compute fracture toughness for the TiN to high speed steel coating substrate system.

    AB - The surface fracture mechanisms, that are the origin to wear, were analysed by three-dimensional finite element method (FEM) modelling on micro-level by stress and strain computer simulations and by experimental studies with a scratch tester. The studied tribological contact was a diamond ball sliding with increasing load on a thin titanium nitride (TiN) coating on a steel substrate. The ball was modelled as rigid, the coating linearly elastic and the steel substrate elastic–plastic taking into account strain hardening effects. In a sliding contact the first crack is initiated at the top of the coating from bending and pulling actions and it grows down through the coating. The effect of initial residual stress fields on coating cracking was approached by carrying out stress simulations with a pre-stressed coating. The stress fields near the indenter were found to relax by plastic deformation to such extent that the remaining stresses had only a marginal effect to macroscopic behavior. Fracture mechanical evaluation of crack driving force and fracture toughness were performed by determining stress intensity factor (SIF) solutions using boundary element analysis. SIF solutions were evaluated for crack fields of different density, location, crack angle, type of loading and mode of loading. The results were utilized to evaluate fracture characteristics and compute fracture toughness for the TiN to high speed steel coating substrate system.

    KW - surface coatings

    KW - stress modelling

    KW - fracture

    KW - scratch tester

    KW - fracture toughness

    KW - residual stresses

    KW - ProperTune

    U2 - 10.1016/j.surfcoat.2005.03.042

    DO - 10.1016/j.surfcoat.2005.03.042

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    JO - Surface and Coatings Technology

    JF - Surface and Coatings Technology

    SN - 0257-8972

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    ER -