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

83 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.
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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.",
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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

VL - 267

SP - 2142

EP - 2156

JO - Wear

JF - Wear

SN - 0043-1648

IS - 12

ER -