Journal ArticleDOI
The Strain and Grain Size Dependence of the Flow Stress of Copper
Niels Hansen,B. Ralph +1 more
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TLDR
In this paper, the authors presented tensile stress strain data for 99.999% copper at room and liquid nitrogen temperature as a function of grain size with some microstructural observations made by transmission electron microscopy.About:
This article is published in Acta Metallurgica.The article was published on 1982-02-01. It has received 267 citations till now. The article focuses on the topics: Flow stress & Grain boundary strengthening.read more
Citations
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Hall-Petch relation and boundary strengthening
TL;DR: In this article, the Hall-Petch relation is discussed separately for the yield stress of polycrystalline metals and for the flow stress of deformed metals for a grain size range from about 20 nm to hundreds of micrometers.
Journal ArticleDOI
Dislocation-mechanics-based constitutive relations for material dynamics calculations
TL;DR: An improved description of copper and ironcylinder impact (Taylor) test results has been obtained through the use of dislocation-mechanics-based constitutive relations in the Lagrangian material dynamics computer program EPIC•2.
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Six decades of the Hall–Petch effect – a survey of grain-size strengthening studies on pure metals
TL;DR: In this paper, the authors gather the grain-size strengthening data from the Hall-Petch studies on pure metals and use this aggregated data to calculate best estimates of these metals' Hall-petch parameters.
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Mechanical behavior of nanocrystalline Cu and Pd
TL;DR: In this article, the bulk mechanical properties of samples of nanocrystalline Cu and Pd consolidated from powders prepared by inert gas condensation were studied. But the results of the study were limited.
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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.
References
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Journal ArticleDOI
The deformation of plastically non-homogeneous materials
TL;DR: The geometrically necessary dislocations as discussed by the authors were introduced to distinguish them from the statistically storages in pure crystals during straining and are responsible for the normal 3-stage hardening.
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The plastic deformation of polycrystalline aggregates
TL;DR: For a number of metallic polycrystalline aggregates, it was shown experimentally that flow stress at constant strain is related to the grain diameter l by where [sgrave]0 and k are constants as discussed by the authors.
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The relation between polycrystal deformation and single-crystal deformation
TL;DR: In this paper, a phenomenological description of crystallographic slip and pencil glide in single crystals is outlined, with emphasis on the behavior under prescribed strains Theoretical relations are established between these single-crystal properties and the behavior of quasi-homogeneous, quasi-isotropic polycrystals deforming uniformly on a macroscopic scale, at subdiffusive temperatures.
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The Effect of Grain Size and Strain on the Tensile Flow Stress of Aluminium at Room Temperature
TL;DR: In this article, tensile-stress-strain data over a strain range from 0.2 to 30% were obtained at room temperature for 99.999 and 99.5% aluminium as a function of grain size.