Journal ArticleDOI
Grain boundary sliding and deformation mechanism maps
TLDR
In this paper, the influence of grain boundary sliding (GBS) on the nature of deformation maps for aluminum and nickel is considered, and it is shown that large portions of such deformation map are dominated by GBS.About:
This article is published in Materials Science and Engineering.The article was published on 1979-08-01. It has received 158 citations till now. The article focuses on the topics: Grain Boundary Sliding & Deformation mechanism.read more
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The search for novel, superhard materials
TL;DR: The recent development in the field of superhard materials with Vickers hardness of ⩾40 GPa is reviewed in this article, where two basic approaches are outlined including the intrinsic superhard material, such as diamond, cubic boron nitride, C3N4, carbonitrides, etc. and extrinsic, nanostructured materials for which superhardness is achieved by an appropriate design of their microstructure.
Journal ArticleDOI
Hardness and strain rate sensitivity of nanocrystalline Cu
Jing-Lin Chen,Lei Lu,Kathy Lu +2 more
TL;DR: The measured hardness of nanocrystalline Cu with grain sizes as small as 10 nm still follows the Hall-Petch relation as discussed by the authors, suggesting grain boundary activities are enhanced but not yet dominant in the plastic deformation.
Journal ArticleDOI
Influence of grain size on the mechanical behaviour of some high strength materials
Alain Lasalmonie,J. L. Strudel +1 more
TL;DR: In this article, the influence of grain size in complex alloys by incorporating the Hall-Petch stress as one component of the internal stress helps in rationalizing the existence of an optimal grain size where creep resistance is maximized.
Journal ArticleDOI
Superplasticity in thin magnesium alloy sheets and deformation mechanism maps for magnesium alloys at elevated temperatures
TL;DR: In this paper, the deformation mechanism maps for face-centered cubic and bodycentered cubic metals were reviewed and found to be deficient in predicting deformation behavior of magnesium alloys with hexagonal close-packed crystal structure.
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Room temperature creep behavior of nanocrystalline nickel produced by an electrodeposition technique
TL;DR: In this article, the results of unidirectional tensile tests were discussed with respect to the deviation from the Hall-Petch relationship for nanocrystalline (6-40 nm) nickel produced by an electrodeposition technique.
References
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Journal ArticleDOI
A first report on deformation-mechanism maps
TL;DR: Deformations-mechanism maps as discussed by the authors display the fields of stress and temperature in which a particular mechanism of plastic flow is dominant, i.e., dislocation glide, diffusional flow and dislocation creep.
Journal ArticleDOI
The rate controlling mechanism in superplasticity
TL;DR: In this paper, a model for superplastic deformation is proposed that is based on grain boundary sliding and is controlled by the rate of deformation of the grain interior, and a comparison is made of the proposed model and the various creep mechanisms in order to reveal the ranges of conditions over which each mechanism predominates and how the various mechanisms are related one to another.
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Grain boundary sliding as a deformation mechanism during creep
TL;DR: In this article, a model for grain boundary sliding is developed in which sliding occurs by the movement of dislocations along, or adjacent to, the boundary by a combination of climb and glide.
Journal ArticleDOI
Creep, Viscoelasticity and Creep Fracture in Solids
John Gittus,Iain Le May +1 more