Journal ArticleDOI
Effects of the substrate on the determination of thin film mechanical properties by nanoindentation
Ranjana Saha,William D. Nix +1 more
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In this paper, the effects of the substrate on the determination of mechanical properties of thin films by nanoindentation were examined, and the properties of aluminum and tungsten films on the following substrates: aluminum, glass, silicon and sapphire.About:
This article is published in Acta Materialia.The article was published on 2002-01-08. It has received 1410 citations till now. The article focuses on the topics: Nanoindentation & Elastic modulus.read more
Citations
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In vivo extraction of Arabidopsis cell turgor pressure using nanoindentation in conjunction with finite element modeling
TL;DR: Measurements on Arabidopsis thaliana under three pressure states (control, turgid and plasmolyzed) and at various stages of plant development are quantified to understand better the process of pressure regulation within plants and to understand the role of turgor pressure in cellular signaling.
Journal ArticleDOI
Application of the three omega method for the thermal conductivity measurement of polyaniline
TL;DR: Yan et al. as mentioned in this paper used shadow masks for metal heater deposition and a process for preparation of low temperature insulating films required between film and heater to measure the thermal conductivity of polyaniline and SiO2 films.
Journal ArticleDOI
Electrophoretic deposition of calcium silicate–reduced graphene oxide composites on titanium substrate
Mehdi Mehrali,Amir Reza Akhiani,Sepehr Talebian,Mohammad Mehrali,Sara Tahan Latibari,Alireza Dolatshahi-Pirouz,Hendrik Simon Cornelis Metselaar +6 more
TL;DR: In this paper, a calcium silicate-reduced graphene oxide (CS-rGO) composites were synthesized, using an in situ hydrothermal method, and they exhibited good apatite-forming ability in simulated body fluid (SBF).
Journal ArticleDOI
Asymptotic solution to axisymmetric indentation of a compressible elastic thin film
TL;DR: In this paper, the axisymmetric indentation of a compressible elastic thin film bonded to a rigid substrate is analyzed for the contact radius much larger than the thickness of the thin film.
Journal ArticleDOI
Comparison of instrumented Knoop and Vickers hardness measurements on various soft materials and hard ceramics
TL;DR: In this article, the authors compared the Vickers and Knoop hardness measurements performed on various ceramics and light alloy materials (soft metals) and compared the results with the projected and true areas of the contact.
References
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Journal ArticleDOI
An improved technique for determining hardness and elastic modulus using load and displacement sensing indentation experiments
Warren C. Oliver,George M. Pharr +1 more
TL;DR: In this paper, the authors used a Berkovich indenter to determine hardness and elastic modulus from indentation load-displacement data, and showed that the curve of the curve is not linear, even in the initial stages of the unloading process.
Journal ArticleDOI
The relation between load and penetration in the axisymmetric Boussinesq problem for a punch of arbitrary profile
TL;DR: In this article, a solution of the axisymmetric Boussinesq problem is derived from which are deduced simple formulae for the depth of penetration of the tip of a punch of arbitrary profile and for the total load which must be applied to the punch to achieve this penetration.
Journal ArticleDOI
Indentation size effects in crystalline materials: A law for strain gradient plasticity
William D. Nix,Huajian Gao +1 more
TL;DR: In this article, the indentation size effect for crystalline materials can be accurately modeled using the concept of geometrically necessary dislocations, which leads to the following characteristic form for the depth dependence of the hardness: H H 0 1+ h ∗ h where H is the hardness for a given depth of indentation, h, H 0 is a characteristic length that depends on the shape of the indenter, the shear modulus and H 0.
Journal ArticleDOI
Mechanism-based strain gradient plasticity— I. Theory
TL;DR: In this paper, a mechanism-based theory of strain gradient plasticity is proposed based on a multiscale framework linking the microscale notion of statistically stored and geometrically necessary dislocations to the mesoscale notion of plastic strain and strain gradient.
Journal ArticleDOI
Influences of pileup on the measurement of mechanical properties by load and depth sensing indentation techniques
Alexei Bolshakov,George M. Pharr +1 more
TL;DR: In this article, the authors used finite element simulation of conical indentation of a wide variety of elastic-plastic materials to investigate the influences of pileup on the accuracy with which hardness and elastic modulus can be measured by load and depth-sensing indentation techniques.
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