Residual stresses in TiN, DLC and MoS2 coated surfaces with regard to their tribological fracture behaviour

Kenneth Holmberg (Corresponding Author), Helena Ronkainen, Anssi, Laukkanen, Kim Wallin, Sture Hogmark, Staffan Jacobson, Urban Wiklund, Roberto M. Souza, Per Ståhle

    Research output: Contribution to journalArticleScientificpeer-review

    84 Citations (Scopus)

    Abstract

    Thin hard coatings on components and tools are used increasingly due to the rapid development in deposition techniques, tribological performance and application skills. The residual stresses in a coated surface are crucial for its tribological performance. Compressive residual stresses in PVD deposited TiN and DLC coatings were measured to be in the range of 0.03–4 GPa on steel substrate and 0.1–1.3 GPa on silicon. MoS2 coatings had tensional stresses in the range of 0.8–1.3 on steel and 0.16 GPa compressive stresses on silicon. The fracture pattern of coatings deposited on steel substrate were analysed both in bend testing and scratch testing. A micro-scale finite element method (FEM) modelling and stress simulation of a 2 μm TiN-coated steel surface was carried out and showed a reduction of the generated tensile buckling stresses in front of the sliding tip when compressive residual stresses of 1 GPa were included in the model. However, this reduction is not similarly observed in the scratch groove behind the tip, possibly due to sliding contact-induced stress relaxation. Scratch and bending tests allowed calculation of the fracture toughness of the three coated surfaces, based on both empirical crack pattern observations and FEM stress calculation, which resulted in highest values for TiN coating followed by MoS2 and DLC coatings, being KC = 4–11, about 2, and 1–2 MPa m1/2, respectively. Higher compressive residual stresses in the coating and higher elastic modulus of the coating correlated to increased fracture toughness of the coated surface.
    Original languageEnglish
    Pages (from-to)2142 - 2156
    JournalWear
    Volume267
    Issue number12
    DOIs
    Publication statusPublished - 2009
    MoE publication typeA1 Journal article-refereed

    Fingerprint

    residual stress
    Residual stresses
    coatings
    Steel
    Coatings
    Compressive stress
    steels
    Silicon
    fracture strength
    Fracture toughness
    finite element method
    Finite element method
    Hard coatings
    sliding contact
    Bending tests
    Physical vapor deposition
    Testing
    Stress relaxation
    Substrates
    stress analysis

    Keywords

    • Coatings
    • Residual stresses
    • TiN
    • DLC
    • MoS2
    • FEM modelling
    • ProperTune

    Cite this

    Holmberg, K., Ronkainen, H., Laukkanen, A., Wallin, K., Hogmark, S., Jacobson, S., ... Ståhle, P. (2009). Residual stresses in TiN, DLC and MoS2 coated surfaces with regard to their tribological fracture behaviour. Wear, 267(12), 2142 - 2156. https://doi.org/10.1016/j.wear.2009.01.004
    Holmberg, Kenneth ; Ronkainen, Helena ; Laukkanen, Anssi, ; Wallin, Kim ; Hogmark, Sture ; Jacobson, Staffan ; Wiklund, Urban ; Souza, Roberto M. ; Ståhle, Per. / Residual stresses in TiN, DLC and MoS2 coated surfaces with regard to their tribological fracture behaviour. In: Wear. 2009 ; Vol. 267, No. 12. pp. 2142 - 2156.
    @article{376f9c2cd7bf4547b80452148f19ab41,
    title = "Residual stresses in TiN, DLC and MoS2 coated surfaces with regard to their tribological fracture behaviour",
    abstract = "Thin hard coatings on components and tools are used increasingly due to the rapid development in deposition techniques, tribological performance and application skills. The residual stresses in a coated surface are crucial for its tribological performance. Compressive residual stresses in PVD deposited TiN and DLC coatings were measured to be in the range of 0.03–4 GPa on steel substrate and 0.1–1.3 GPa on silicon. MoS2 coatings had tensional stresses in the range of 0.8–1.3 on steel and 0.16 GPa compressive stresses on silicon. The fracture pattern of coatings deposited on steel substrate were analysed both in bend testing and scratch testing. A micro-scale finite element method (FEM) modelling and stress simulation of a 2 μm TiN-coated steel surface was carried out and showed a reduction of the generated tensile buckling stresses in front of the sliding tip when compressive residual stresses of 1 GPa were included in the model. However, this reduction is not similarly observed in the scratch groove behind the tip, possibly due to sliding contact-induced stress relaxation. Scratch and bending tests allowed calculation of the fracture toughness of the three coated surfaces, based on both empirical crack pattern observations and FEM stress calculation, which resulted in highest values for TiN coating followed by MoS2 and DLC coatings, being KC = 4–11, about 2, and 1–2 MPa m1/2, respectively. Higher compressive residual stresses in the coating and higher elastic modulus of the coating correlated to increased fracture toughness of the coated surface.",
    keywords = "Coatings, Residual stresses, TiN, DLC, MoS2, FEM modelling, ProperTune",
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    Holmberg, K, Ronkainen, H, Laukkanen, A, Wallin, K, Hogmark, S, Jacobson, S, Wiklund, U, Souza, RM & Ståhle, P 2009, 'Residual stresses in TiN, DLC and MoS2 coated surfaces with regard to their tribological fracture behaviour', Wear, vol. 267, no. 12, pp. 2142 - 2156. https://doi.org/10.1016/j.wear.2009.01.004

    Residual stresses in TiN, DLC and MoS2 coated surfaces with regard to their tribological fracture behaviour. / Holmberg, Kenneth (Corresponding Author); Ronkainen, Helena; Laukkanen, Anssi,; Wallin, Kim; Hogmark, Sture; Jacobson, Staffan; Wiklund, Urban; Souza, Roberto M.; Ståhle, Per.

    In: Wear, Vol. 267, No. 12, 2009, p. 2142 - 2156.

    Research output: Contribution to journalArticleScientificpeer-review

    TY - JOUR

    T1 - Residual stresses in TiN, DLC and MoS2 coated surfaces with regard to their tribological fracture behaviour

    AU - Holmberg, Kenneth

    AU - Ronkainen, Helena

    AU - Laukkanen, Anssi,

    AU - Wallin, Kim

    AU - Hogmark, Sture

    AU - Jacobson, Staffan

    AU - Wiklund, Urban

    AU - Souza, Roberto M.

    AU - Ståhle, Per

    PY - 2009

    Y1 - 2009

    N2 - Thin hard coatings on components and tools are used increasingly due to the rapid development in deposition techniques, tribological performance and application skills. The residual stresses in a coated surface are crucial for its tribological performance. Compressive residual stresses in PVD deposited TiN and DLC coatings were measured to be in the range of 0.03–4 GPa on steel substrate and 0.1–1.3 GPa on silicon. MoS2 coatings had tensional stresses in the range of 0.8–1.3 on steel and 0.16 GPa compressive stresses on silicon. The fracture pattern of coatings deposited on steel substrate were analysed both in bend testing and scratch testing. A micro-scale finite element method (FEM) modelling and stress simulation of a 2 μm TiN-coated steel surface was carried out and showed a reduction of the generated tensile buckling stresses in front of the sliding tip when compressive residual stresses of 1 GPa were included in the model. However, this reduction is not similarly observed in the scratch groove behind the tip, possibly due to sliding contact-induced stress relaxation. Scratch and bending tests allowed calculation of the fracture toughness of the three coated surfaces, based on both empirical crack pattern observations and FEM stress calculation, which resulted in highest values for TiN coating followed by MoS2 and DLC coatings, being KC = 4–11, about 2, and 1–2 MPa m1/2, respectively. Higher compressive residual stresses in the coating and higher elastic modulus of the coating correlated to increased fracture toughness of the coated surface.

    AB - Thin hard coatings on components and tools are used increasingly due to the rapid development in deposition techniques, tribological performance and application skills. The residual stresses in a coated surface are crucial for its tribological performance. Compressive residual stresses in PVD deposited TiN and DLC coatings were measured to be in the range of 0.03–4 GPa on steel substrate and 0.1–1.3 GPa on silicon. MoS2 coatings had tensional stresses in the range of 0.8–1.3 on steel and 0.16 GPa compressive stresses on silicon. The fracture pattern of coatings deposited on steel substrate were analysed both in bend testing and scratch testing. A micro-scale finite element method (FEM) modelling and stress simulation of a 2 μm TiN-coated steel surface was carried out and showed a reduction of the generated tensile buckling stresses in front of the sliding tip when compressive residual stresses of 1 GPa were included in the model. However, this reduction is not similarly observed in the scratch groove behind the tip, possibly due to sliding contact-induced stress relaxation. Scratch and bending tests allowed calculation of the fracture toughness of the three coated surfaces, based on both empirical crack pattern observations and FEM stress calculation, which resulted in highest values for TiN coating followed by MoS2 and DLC coatings, being KC = 4–11, about 2, and 1–2 MPa m1/2, respectively. Higher compressive residual stresses in the coating and higher elastic modulus of the coating correlated to increased fracture toughness of the coated surface.

    KW - Coatings

    KW - Residual stresses

    KW - TiN

    KW - DLC

    KW - MoS2

    KW - FEM modelling

    KW - ProperTune

    U2 - 10.1016/j.wear.2009.01.004

    DO - 10.1016/j.wear.2009.01.004

    M3 - Article

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    SP - 2142

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    JO - Wear

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