Work of indentation methods for determining copper film hardness

Beegan, D.; Chowdhury, S.; Laugier, M. T.

doi:10.1016/j.surfcoat.2004.02.003

Cited by 63 publications

(32 citation statements)

References 17 publications

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“…It can separate the indentation work into elastic (We) and plastic components (Wp) since Wt = Wp + We [28]. The determination of We/Wt ratio is straightforward from the load-unload curves, no need for any model application.…”

Section: Mechanical Propertiesmentioning

confidence: 99%

“…In addition, special interest is given to the unload-to-load-ratio of nano-indentation, which represents the ratio between the total work (W t ) done and the recovered (elastic) work during indentation [27]. It can separate the indentation work into elastic (W e ) and plastic components (W p ) since W t = W p + W e [28]. The determination of W e /W t ratio is straightforward from the load-unload curves, no need for any model application.…”

Section: Wear Performance Of Coatingsmentioning

confidence: 99%

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Influence of Process Parameters on High Velocity Oxy-Fuel Sprayed Cr3C2-25%NiCr Coatings

et al. 2017

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Abstract:In this work, the Cr 3 C 2 -25% NiCr powder was deposited on stainless steel with different combustion pressures and powder feed rates using HVOF technique. The microstructure, porosity, micro-hardness, indentation fracture toughness, adhesion strength, and wear resistance at 500 • C of the coatings were investigated. The results showed that HVOF sprayed Cr 3 C 2 -25% NiCr coatings possessed low porosity, high micro-hardness, and enough adhesion strength. The powder feed rate had obvious effect on porosity, micro-hardness and indention fracture toughness of the coatings, and the coating sprayed under the powder feed rate of 33.5 g/min possessed the optimal performance. The wear tests illustrated that the HVOF sprayed Cr 3 C 2 -25NiCr coating possessed good wear resistance at the temperature of 500 • C, in which the coating sprayed at the powder feed rate of 33.5 g/min had the best wear resistance due to its dense structure and enough fracture toughness.

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Section: Mechanical Propertiesmentioning

confidence: 99%

Section: Wear Performance Of Coatingsmentioning

confidence: 99%

Influence of Process Parameters on High Velocity Oxy-Fuel Sprayed Cr3C2-25%NiCr Coatings

et al. 2017

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“…For example, the dynamic hardness of materials can be expressed by the absorbed energy and the deformed volume originally proposed by Tabor. [49] Many authors, such as [24,[58][59][60], have introduced this hardness concept into nanoindentation. However, the absorbed energy was usually assumed to be the difference between impact energy and rebounding kinetic energy.…”

Section: Indentation Phasementioning

confidence: 99%

An investigation into the dynamic indentation response of metallic materials

et al. 2016

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The dynamic indentation response of several ductile metallic materials [Al(111), polycrystalline copper, Fe, and Ti6Al4V] has been investigated using a pendulum-based nano-impact test. The impact process involves repetitive contact cycles until finally coming to rest in the material. Each cycle includes four phases: acceleration, indentation, rebound, and deceleration. The dynamic indentation resistance of the metallic materials scales with their hardness determined under quasi-static conditions. However, through a one-dimensional analytical model, it has been shown that the relationship between the dynamic resistance and the depth during indentation cannot be adequately described using the quadratic relationship commonly found under quasi-static conditions. A power law relationship with a reduced index was proposed and it is found the index is around 1 when the quasi-static and dynamic compliance are similar. A linear relationship between impact resistance and depth has been found during rebound, where the released elastic energy is much higher than that produced by quasi-static nanoindentation.

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“…Loubet et al show that this model can estimate precisely the projected contact area for a large range of materials, except for materials with high strain-hardening exponent [5]. One can cite another model based on the calculation of the indentation work [14,15]. It consists in determining the area below the loading-unloading curve, and this area permits the calculation of work performed during indentation.…”

Section: Introductionmentioning

confidence: 99%

A new method to determine the true projected contact area using nanoindentation testing

Guillonneau

Kermouche

Bergheau

et al. 2015

Comptes Rendus. Mécanique

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International audienceA new technique to determine the true projected contact area by nanoindentation is presented. It requires combining two models used normally to determine the representative stress and strain from nanoindentation parameters. Consequently, it does not require any model classically used to calculate the projected contact area. The method requires performing indentation on the same sample with two indenter tips with different geometries (Berkovich tip and a tetrahedral tip with a semi-angle equal to 50 degrees). The method was applied to three samples: glass, PMMA, and 100C6 steel. The projected contact area obtained by this model was accurate in all cases. (C) 2015 Academie des sciences. Published by Elsevier Masson SAS. All rights reserved

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Work of indentation methods for determining copper film hardness

Cited by 63 publications

References 17 publications

Influence of Process Parameters on High Velocity Oxy-Fuel Sprayed Cr3C2-25%NiCr Coatings

Influence of Process Parameters on High Velocity Oxy-Fuel Sprayed Cr3C2-25%NiCr Coatings

An investigation into the dynamic indentation response of metallic materials

A new method to determine the true projected contact area using nanoindentation testing

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