Elevated temperature dependence of hardness in tri-metallic nano-scale metallic multilayer systems

Schoeppner, Rachel L.; Abdolrahim, Niaz; Salehinia, I.; Zbib, Hussein M.; Bahr, David F.

doi:10.1016/j.tsf.2014.05.031

Cited by 14 publications

(7 citation statements)

References 33 publications

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“…9). Similar improvement in temperature sensitivity was observed in tri-metallic Cu/Ni/Nb nanolaminates [19] with decreasing interlayer thicknesses and was attributed to the increase in shear resistance of the interfaces at smaller length scales in conjunction with molecular dynamics simulations. The role of the semi-coherent nature of the interfaces in promoting the shear resistance of the interfaces is also supported by the elevated temperature response of Cu/W nanolayered thin films [18].…”

Section: Strength and Deformation Mechanism At Elevated Temperaturesupporting

confidence: 69%

“…While several studies have been undertaken to clarify the mechanical behavior of such films at ambient temperature [4][5][6][7][8][9][10][11][12][13][14][15][16], few have investigated the deformation response at elevated temperatures [17][18][19][20][21][22]. These few studies have mostly used the instrumented indentation technique, which despite the ease of testing presents difficulty in direct interpretation of the results due to the complex stress states involved.…”

Section: Introductionmentioning

confidence: 99%

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Comparing small scale plasticity of copper-chromium nanolayered and alloyed thin films at elevated temperatures

et al. 2015

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Section: Strength and Deformation Mechanism At Elevated Temperaturesupporting

confidence: 69%

Section: Introductionmentioning

confidence: 99%

Comparing small scale plasticity of copper-chromium nanolayered and alloyed thin films at elevated temperatures

et al. 2015

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“…Due to their outstanding properties and therefore, to the exceptional capabilities provided to the coated system, multilayer coatings have attracted a great deal of attention and in the past few years have become an important research objective. Thus, a wide range of scientific and technological aspects concerning these coatings have been investigated, which include, among others, the correlation between microstructure, mechanical properties (hardness and elastic modulus), impact resistance and tribological performance of different systems [1][2][3][4][5][6][7][8][9][10], deformation mechanisms induced by indentation and nanoindentation damage [11][12][13], effect of layer architecture (number of layers, layer thickness, modulation ratio, bi-layer and multi-layer period) on mechanical properties, tribological performance and oxidation resistance [14][15][16][17][18][19][20][21][22][23][24][25][26][27][28], extraction of mechanical properties by different methods [29,30], effect of substrate temperature on residual stresses, hardness and resistivity [31,32] and plastic deformation and size effects [33,34].…”

Section: Introductionmentioning

confidence: 99%

Modeling the composite hardness of multilayer coated systems

2015

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The change in the composite hardness with penetration depth derived from nanoindentation tests conducted on coated systems, which involve the deposition of multilayer coatings, in general exhibits a complex shape, as a consequence of the sequential contribution of each coating layer to the composite hardness during indentation loading. In spite that there are a number of models, which have been proposed for describing the change of the composite hardness with penetration depth for monolayer coatings, as well as for determining the coating and substrate hardness, very few research works have addressed the problem of describing this kind of data for multilayer coatings. In the present communication, a rational approach is proposed for extending two models widely used for the analysis of monolayer coatings, in order to describe the composite hardness data of multilayer coatings, as well as for determining the hardness of each individual layer and that of the substrate. Thus, a modified form of the models earlier advanced by Korsunsky et al. and Puchi-Cabrera, as well as their computational instrumentation, are proposed. The extension of both models to deal with multilayer coatings is conducted on the basis of the model developed by Iost et al., in order to adapt the Jönsson-Hogmark model to the analysis of indentation data of multilayer coatings. Such a methodology provides a means of computing the volume fraction of each individual layer in the coating, which contributes to the composite hardness. According to the results obtained, this scheme seems to be general enough to be applicable to different hardness models other than the Jönsson-Hogmark model. The proposed modified models are validated employing nanoindentation results obtained from a 2024-T6 aluminum alloy coated with a diamond-like carbon film, employing electroless NiP as intermediate layer. The advantages and disadvantages of the different models employed in the analysis are thoroughly discussed.

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“…Particularly, the increase in hardness and load-bearing capacity brought about by the deposition of such films has been attributed to the presence of interfaces between the different layers, which act as barriers to dislocation motion. Therefore, as the number of such interfaces increases, a concomitant increase in the mechanical properties and performance of the multilayer coated system has been observed [1][2][3][4][5][6][7][8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

A description of the composite elastic modulus of multilayer coated systems

2015

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To cite this version:E.S. Puchi-Cabreraa, M.H. Staia, Alain Iost. A description of the composite elastic modulus of multilayer coated systems. Thin Solid Films, Elsevier, 2015, 583, pp.177-193. 10 The evaluation of the elastic response of coated systems under indentation loading represents a crucial issue, which determines the behavior of such systems under tribological applications. Although a number of models have been proposed in the literature for the description of the change in the composite modulus with indentation depth, as well as for the determination of the elastic modulus of monolayer coatings, only few works address the analysis of multilayer coatings. The present work proposes a general methodology, which allows the modification and extension of the models employed in the analysis of monolayer coatings, for the study of the elastic response of multilayer coatings. Bull for a bilayer coated system. It has been shown that the different models analyzed are able to provide a satisfactory description of the experimental data, although the quality of the fit depends on the number of material parameters involved in each model. The mean square error of the fit is employed for conducting a comparison between the models.

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Elevated temperature dependence of hardness in tri-metallic nano-scale metallic multilayer systems

Cited by 14 publications

References 33 publications

Comparing small scale plasticity of copper-chromium nanolayered and alloyed thin films at elevated temperatures

Comparing small scale plasticity of copper-chromium nanolayered and alloyed thin films at elevated temperatures

Modeling the composite hardness of multilayer coated systems

A description of the composite elastic modulus of multilayer coated systems

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