Numerical Modeling of Functional Graded TiB Coating in Nanoindentation on Determination of Mechanical Properties

Uysal, Mine Uslu

doi:10.1016/j.matpr.2015.04.025

Cited by 5 publications

(2 citation statements)

References 17 publications

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“…When the indenter is considered rigid and is forced into the indented material, the large displacement contact problem is raised. 41,42 Therefore, formulation of the indentation problem as a large displacement contact problem leads to a more accurate numerical simulation. As a consequent, a highly nonlinear problem is addressed.…”

Section: The Mathematical Formulation Of the Problemmentioning

confidence: 99%

Modeling and analysis of the nonlinear indentation problems of functionally graded elastic layered solids

Attia

El-Shafei

2019

Proceedings of the Institution of Mechanical Engineers, Part J:

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In tribological and thermo-electro-mechanical applications with an appropriate gradation of properties, functionally graded materials provide superior performance for damage and wear resistance of contact systems and thermal and mechanical responses for other mechanical devices. This paper presents a nonlinear mixed variational-based computational model for the analysis of nonlinear plane indentation problems of elastic functionally graded layered elastic solids. The functionally graded elastic layer is perfectly bonded to the elastic substrate and is normally loaded by a cylindrical rigid punch. In addition to nonlinearity inherent to the contact problem, the developed model accounts for the geometric nonlinearity in the sense of larger displacements and rotations, but smaller strains. The modulus of elasticity as well as Poisson's ratio of the graded layer are varying along the thickness of the layer according to both exponential and power laws. On the contrary, in the conventional homogeneous finite element formulation the isoparametric graded finite element formulation is adopted on the level of Gaussian integration points to realize the gradation in material properties. The friction at the contact interface is modeled using Coulomb's friction law. Moreover, the inequality contact constraints are exactly satisfied throughout the contact interface by employing the Lagrange multiplier method, where the indentation force and the displacement fields are treated as independent variables. The obtained results of contact pressure, tangential contact stress, stress distribution, and indentation force show a significant influence of the material distribution, gradation law, gradient index, and thickness of the functionally graded layer.

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Section: The Mathematical Formulation Of the Problemmentioning

confidence: 99%

Modeling and analysis of the nonlinear indentation problems of functionally graded elastic layered solids

Attia

El-Shafei

2019

Proceedings of the Institution of Mechanical Engineers, Part J:

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“…Bartosik et al revealed the correlation between the variations of the bilayer period and the residual strain in the TiAlN/TiSiN multilayer coating, implying that the minimum modulation period leads to the minimum in-plane compressive residual strains [29]. The gradient in the thickness and/or composition of each layer is effective to eliminate residual stresses as well as control the wear rate [30][31][32][33]. Chang et al revealed that the multilayer coatings with transition layers showed a dense structure which improved the adhesion strength and high hardness, such as TiSiN/TiVN, CrAlSiN/TiVN, and AlCrSiN [18,33,34].…”

Section: Introductionmentioning

confidence: 99%

Effect of Gradient Multilayer Design on Tribological Performance of TiN/TiSiN Coatings Prepared by Cathodic Arc Ion Plating

Jiao

Jiang

et al. 2023

Coatings

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Hard coatings, such as transition metal nitrides, have been widely applied to improve the mechanical properties and tribological performance of cutting tools. The coatings in various multilayered or gradient structures have been designed to meet the demands of more severe service environments and more precise processing requirements. In this work, TiN/TiSiN coatings in several gradient and multilayered structures were deposited on cemented carbides by cathodic arc ion plating using Ti and TiSi alloy targets. The modulation period (Λ) of the multilayer gradually varies with thickness, ranging from 6 to 46 nm. The gradient multilayer coatings consist of a nanocrystalline-amorphous composite with compact growth. The coating with a modulation period first increasing and then decreasing has the highest hardness of 38 GPa, and the maximum residual compressive stress of −2.71 GPa, as well as the minimum coefficient of friction (COF) and wear rate. Gradient and multilayer structures moderate the brittleness caused by the presence of amorphous SiNx phase and optimize the mechanical properties and tribological performances of the coatings.

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Past and present of functionally graded coatings: Advancements and future challenges

Fathi

Wei

Saleh

et al. 2022

Applied Materials Today

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Numerical Modeling of Functional Graded TiB Coating in Nanoindentation on Determination of Mechanical Properties

Cited by 5 publications

References 17 publications

Modeling and analysis of the nonlinear indentation problems of functionally graded elastic layered solids

Modeling and analysis of the nonlinear indentation problems of functionally graded elastic layered solids

Effect of Gradient Multilayer Design on Tribological Performance of TiN/TiSiN Coatings Prepared by Cathodic Arc Ion Plating

Past and present of functionally graded coatings: Advancements and future challenges

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