Journal ArticleDOI
Demonstration of an inverse Hall–Petch relationship in electrodeposited nanocrystalline Ni–W alloys through tensile testing
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In this article, tensile tests were carried out on dozens of electrodeposited nanocrystalline Ni-W alloys with grain sizes of 20, 12, 8 and 5 nm.About:
This article is published in Scripta Materialia.The article was published on 2006-07-01. It has received 138 citations till now. The article focuses on the topics: Tensile testing & Nanocrystalline material.read more
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Deformation twinning in nanocrystalline materials
TL;DR: In this paper, a review of deformation twinning in nanocrystalline materials is presented, including deformation twins observed by molecular dynamics simulations and experiments, twinning mechanisms, factors affecting the twinning, analytical models on the nucleation and growth of deformations, interactions between twins and dislocations, and the effects of twins on mechanical and other properties.
Journal ArticleDOI
What is behind the inverse Hall–Petch effect in nanocrystalline materials?
C. E. Carlton,Paulo J. Ferreira +1 more
TL;DR: In this article, the authors reported an explanation for the inverse Hall-Petch effect based on the statistical absorption of dislocations by grain boundaries, showing that the yield strength is dependent on strain rate and temperature and deviates from the Hall-petch relationship below a critical grain size.
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Thermo-mechanical behavior of low-dimensional systems: The local bond average approach
TL;DR: Local bond average (LBA) as mentioned in this paper has been proposed to compare the measurable quantities of a specimen to the identities of its representative bonds and the energetic responses of these bonds (bond nature, order, length and strength) to external stimuli, such as changes in temperatures and coordination environments.
Journal ArticleDOI
The Hall-Petch breakdown in nanocrystalline metals: A crossover to glass-like deformation
TL;DR: In this paper, the deformation behavior of nanocrystalline Ni-W alloys is evaluated by nanoindentation techniques for grain sizes of 3-150nm, spanning both the range of classical Hall-Petch behavior as well as the regime where deviations from the Hall-petch trend are observed.
Journal ArticleDOI
Ni-W electrodeposited coatings: Characterization, properties and applications
TL;DR: In this paper, different aspects of electrodeposition, microstructure, corrosion, oxidation, wear, and mechanical properties of Ni-W alloys and nano/micro composites are reviewed.
References
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Journal ArticleDOI
Deformation of electrodeposited nanocrystalline nickel
TL;DR: In this article, the mechanisms of deformation and damage evolution in electrodeposited, fully dense, nanocrystalline Ni with an average grain size of ~30 nm and a narrow grain size distribution were investigated by recourse to (i) tensile tests performed in situ in the transmission electron microscope and (ii) microscopic observations made at high resolution following ex situ deformation induced by compression, rolling and nanoindentation.
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Some critical experiments on the strain-rate sensitivity of nanocrystalline nickel
TL;DR: In this paper, a simple computational model, predicated on the assumption that a rate-sensitive grain boundary affected zone exists, is shown to explain the observed effect of grain size on the rate-dependent plastic response.
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Instabilities and ductility of nanocrystalline and ultrafine-grained metals
TL;DR: In this article, the authors discuss the various plastic and/or failure instabilities the nc and ufg metals are susceptible to, and present strategies to enhance the ductility, especially in terms of improving the uniform tensile strain.
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Nanocrystalline electrodeposited Ni: microstructure and tensile properties
TL;DR: In this article, the microstructure of commercially available nanocrystalline (nc) electroplated Ni foils is studied by means of Xray diffraction and transmission electron microscopy.
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Ductility of Nanostructured Materials
TL;DR: In this article, it has been predicted that extrapolation of the grain size, or the scale of the microstructure, to the nanoscale will lead to both strengthening and an increase in ductility.