강체인 구와 DLC 코팅면 사이의 압입 및 미끄럼 접촉해석: 지지층 두께의 영향
Indentation and Sliding Contact Analysis between a Rigid Ball and DLC-Coated Steel Surface: Influence of Supporting Layer Thickness
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Various heat-treated and surface coating methods are used to mitigate abrasion in sliding machineparts. The most cost effective of these methods involves hard coatings such as diamond-like carbon (DLC). DLChas various advantages, including a high level of hardness, low coefficient of friction, and low wear rate. In practice,a supporting layer is generally inserted between the DLC layer and the steel substrate to improve the loadcarrying capacity. In this study, an indentation and sliding contact problem involving a small, hard, spherical particleand a DLC-coated steel surface is modeled and analyzed using a nonlinear finite element code, MARC, toinvestigate the influence of the supporting layer thickness on the coating characteristics and the related coatingfailure mechanisms. The results show that the amount of plastic deformation and the maximum principal stressdecrease with an increase in the supporting layer thickness. However, the probability of the high tensile stresswithin the coating layer causing a crack is greatly increased. Therefore, in the case of DLC coating with a supportinglayer, fatigue wear can be another important cause of coating layer failure, together with the generallywell-known abrasive wear.
Abstract
Various heat-treated and surface coating methods are used to mitigate abrasion in sliding machineparts. The most cost effective of these methods involves hard coatings such as diamond-like carbon (DLC). DLChas various advantages, including a high level of hardness, low coefficient of friction, and low wear rate. In practice,a supporting layer is generally inserted between the DLC layer and the steel substrate to improve the loadcarrying capacity. In this study, an indentation and sliding contact problem involving a small, hard, spherical particleand a DLC-coated steel surface is modeled and analyzed using a nonlinear finite element code, MARC, toinvestigate the influence of the supporting layer thickness on the coating characteristics and the related coatingfailure mechanisms. The results show that the amount of plastic deformation and the maximum principal stressdecrease with an increase in the supporting layer thickness. However, the probability of the high tensile stresswithin the coating layer causing a crack is greatly increased. Therefore, in the case of DLC coating with a supportinglayer, fatigue wear can be another important cause of coating layer failure, together with the generallywell-known abrasive wear.
참고문헌 (15)
- Bhushan, B, "Principles and Applications of Tribology" (1999), John Wiley & Sons
- Komvopoulos, K, "Elastic-Plastic Finite Element Analysis of Indented Layered Media", Trans. ASME, J. Tribol, 111, pp.430~439 (1989)
- Michler, J, "Analysis of Coating Fracture and Substrate Plasticity Induced by Spherical Indentors: Diamond and Diamond-like Carbon Layers on Steel Substrates", Thin Solid Films, 381, pp.119~134 (2001)
- Ronkainen, H, "Load-Carrying Capacity Evaluation of Coating", Substrate Systems for Hydrogen-Free and Hydrogenated Diamond-like Carbon Films, 1999, pp.6, 63~73
- Wei, C, "A Finite Element Analysis of the Effects of Residual Stress, Substrate Roughness and Non-uniform Stress Distribution on the Mechanical Properties of Diamond-like Carbon Films", Diam. Relat. Mater, 20, pp.839~844 (2011)
- 김동욱, "Friction Characteristics of DLC and WC", C, 2011, pp.27(6), 308~313[DOI]
- Holmberg, K, "Tribological Contact Analysis of a Rigid Ball Sliding on a Hard Coated Surface Part I: Modelling Stresses and Strains", Surf. Coat. Technol, 200, pp.3793~3809 (2006)
- Holmberg, K, "Tribological Contact Analysis of a Rigid Ball Sliding on a Hard Coated Surface Part II: Material Deformations, Influence of Coating Thickness and Young’s Modulus", Surf. Coat. Technol, 200, pp.3810~3823 (2006)
- Holmberg, K, "Tribological Contact Analysis of a Rigid Ball Sliding on a Hard Coated Surface Part III: Fracture Toughness Calculation and Influence of Residual Stresses", Surf. Coat. Technol, 200, pp.3824~3844 (2006)
- Holmberg, K, "Tribological Analysis of TiN and DLC Coated Contacts by 3D FEM Modelling and Stress Simulation", Wear, 264(9-10), pp.887~884 (2008)
- Kot, M, "Analysis of Spherical Indentations of Coating-substrate Systems: Experiments and Finite Element Modeling", Mater. Des, 43, pp.99~111 (2013)
- Kot, M, "The Tribological Phenomena of a New Type of TiN", a-C:H Multilayer Coatings, 2013, pp.51, 280~286
- 박태조, "시일과 코팅된 스틸면 사이의 구형 입자에 의한 미끄럼 접촉 해석", 한국윤활학회지, 28(6), pp.283~288 (2012), 한국윤활학회[DOI]
- 이준혁, "유한요소해석에 의한 DLC 코팅면의 마멸기구에 대한 연구", 한국윤활학회지, 29(6), pp.366~371 (2013), 한국윤활학회[DOI]
- MENTAT 2012r1 User’s Guide, "MSC. MARC", pp.2012, MSC