Analytical Methods to Determine the Stress State in the Substrate–Coating System Under Mechanical Loads

Долгов, Н. А.

doi:10.1007/s11223-016-9809-5

Cited by 42 publications

(28 citation statements)

References 41 publications

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“…The coating fills the micro-grooves on the surface, thereby providing a kind of "healing" of the surface (it should be noted that a similar effect is observed when applying coatings of various compositions). There is reason to expect that the coating will affect the characteristics of ceramic samples taking into account the described effect and the fact that the hardness of the formed DLC coating is not less than 25 GPa [73][74][75][76][77], which significantly exceeds the initial hardness of the tool ceramics, and the coating has a lower coefficient of friction and good strength of the adhesive bond with ceramic basis [78][79][80].…”

Section: Influence Of Dlc Coatings On the Transformation Of The Sintered Ceramic Blanks Characteristicsmentioning

confidence: 99%

Development of DLC-Coated Solid SiAlON/TiN Ceramic End Mills for Nickel Alloy Machining: Problems and Prospects

et al. 2021

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The study is devoted to the development and testing of technological principles for the manufacture of solid end mills from ceramics based on a powder composition of α-SiAlON, β-SiAlON, and TiN additives, including spark plasma sintering powder composition, diamond sharpening of sintered ceramic blanks for shaping the cutting part of mills and deposition of anti-friction Si-containing diamond-like carbon (DLC) coatings in the final stage. A rational relationship between the components of the powder composition at spark plasma sintering was established. The influence of optimum temperature, which is the most critical sintering parameter, on ceramic samples’ basic physical and mechanical properties was investigated. DLC coatings’ role in changing the surface properties of ceramics based on SiAlON, such as microrelief, friction coefficient, et cetera, was studied. A comparative analysis of the efficiency of two tool options, such as developed samples of experimental mills made of SiAlON/TiN and commercial samples ceramic mills based on SiAlON, doped with stabilizing additives containing Yb when processing nickel alloys (NiCr20TiAl alloy was used as an example). DLC coatings’ contribution to the quantitative indicators of the durability of ceramic mills and the surface quality of machined products made of nickel alloy is shown.

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Section: Influence Of Dlc Coatings On the Transformation Of The Sintered Ceramic Blanks Characteristicsmentioning

confidence: 99%

Development of DLC-Coated Solid SiAlON/TiN Ceramic End Mills for Nickel Alloy Machining: Problems and Prospects

et al. 2021

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“…1 which is a premise for appearance of lengthwise cracks between layers [22,23]). The lengthwise crack is located arbitrary along the width of the beam's cross-section (Fig.1).…”

Section: Lengthwise Fracture Analysesmentioning

confidence: 99%

Lengthwise fracture analyses of functionally graded beams by the Ramberg-Osgood equation

Rizov

2018

Eng. rev. (Online)

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“…The safety and durability of multilayered structural members and components depend strongly upon their delamination behaviour. Usually, fracture in multilayered structural components has been studied by the methods of linear-elastic fracture mechanics assuming linear-elastic behaviour of the material [13,14]. Recently, particular delamination fracture analyses of non-linear elastic multilayered beam configurations of rectangular cross-section loaded in bending have been developed assuming that each layer exhibits material inhomogeneity [15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Analyses of delaminations in non-linear elastic multilayered inhomogeneous beam configurations

Rizov

2020

Eng. rev. (Online)

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This paper presents investigation of delamination fracture behavior of multilayered non-linear elastic beam configurations by using the Ramberg-Osgood stress-strain relation. It is assumed that each layer exhibits continuous material inhomogeneity along the width as well as along thickness of the layer. An approach for determination of the strain energy release rate is developed for a delamination crack located arbitrary along the multilayered beam height. The approach can be applied for multilayered beams of arbitrary cross-section under combination of axial force and bending moments. The layers may have different thickness and material properties. The number of layers is arbitrary. The approach is applied for analyzing the delamination fracture behavior of a multilayered beam configuration subjected to four-point bending. The beam has a rectangular cross-section. The delamination crack is located symmetrically with respect to the beam midspan. The strain energy release rate is derived assuming that the modulus of elasticity varies continuously in the cross-section of each layer according to a hyperbolic law. In order to verify the solution to the strain energy release rate, the delamination fracture behavior of the multilayered non-linear elastic four-point bending beam configuration is studied also by applying the method of the J-integral. The solution to the strain energy release rate derived in the present paper is used in order to perform a parametric study of delamination.

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Analytical Methods to Determine the Stress State in the Substrate–Coating System Under Mechanical Loads

Cited by 42 publications

References 41 publications

Development of DLC-Coated Solid SiAlON/TiN Ceramic End Mills for Nickel Alloy Machining: Problems and Prospects

Development of DLC-Coated Solid SiAlON/TiN Ceramic End Mills for Nickel Alloy Machining: Problems and Prospects

Lengthwise fracture analyses of functionally graded beams by the Ramberg-Osgood equation

Analyses of delaminations in non-linear elastic multilayered inhomogeneous beam configurations

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