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Cellular activity of bioactive nanograined/ultrafine-grained materials
Acta Biomaterialia, 2010Our recent electron microscopy study on biomimetic nanostructured coatings on nanograined/ultrafine-grained (NG/UFG) substrates [Mater Sci Eng C 2009;29:2417-27] indicated that electrocrystallized nanohydroxyapatite (nHA) on phase-reversion-induced NG/UFG substrates exhibited a vein-type interconnected and fibrillar structure that closely mimicked the ...
R D K, Misra +4 more
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Evaluating the Flow Properties of Ultrafine-Grained Materials
Advanced Materials Research, 2013Processing through the application of severe plastic deformation (SPD) provides an opportunity for achieving significant grain refinement, typically to the submicrometer or even the nanometer level. If these small grains are reasonably stable at elevated temperatures, it is possible to achieve excellent superplastic capabilities at very rapid strain ...
Kawasaki, Megumi, Langdon, Terence G.
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Indentation size effects and its relevance to ultrafine-grained materials [PDF]
Materials Science & Engineering A: Structural Materials: Properties, Microstructure and ProcessingThe well-known indentation size effect (ISE) is reviewed with special emphasis on the effect of grain size in the polycrystalline matrix. It is demonstrated that there is a close connection between the Hall-Petch relationship and the characteristics of
Quang Chinh Nguyen +2 more
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Inelastic recovery in nano and ultrafine grained materials
Modelling and Simulation in Materials Science and Engineering, 2016Ultrafine and nano grained metals show plastic strain recovery upon unloading and reverse plastic strain during cyclic loading. It has been suggested that these phenomena are related to the residual stress due to grain size inhomogeneity and to grain boundary deformation mechanisms.
Yuesong Xie, Marisol Koslowski
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Grain and subgrain boundaries in ultrafine-grained materials
Materials Characterization, 2009The attractive metallographic electron backscatter diffraction (EBSD) method is used to describe the effect of the number N of passes on the subgrain and grain structures of pure aluminium and copper processed by equal channel angular pressing (ECAP).
Saxl, I. (Ivan) +3 more
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Analysis of precipitates in ultrafine-grained metallic materials
Philosophical Magazine, 2018ABSTRACTIn the present work, new possibilities of the X-ray diffraction for investigations of the phase composition, size, shape and volume fraction of particles in ultrafine-grained ferritic/martensitic steel and the Cu-Cr-Zr alloy have been demonstrated. For the first time, the method of X-ray diffraction in the transmission mode was used to identify
V.D. Sitdikov +6 more
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Nanocrystalline and Ultrafine Grained Materials by Mechanical Alloying
Materials Science Forum, 2007Recent research at Harbin Institute of Technology on the synthesis of nanocrystalline and untrafine grained materials by mechanical alloying is reviewed. Examples of the materials include aluminum alloy, copper alloy, Ti/Al composite, magnesium-based hydrogen storage material, and Nd2Fe14B/α-Fe magnetic nanocomposite.
Erde Wang, Lian Xi Hu
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Strain-rate sensitivity of ultrafine-grained materials
Zeitschrift für Metallkunde, 2005Abstract The strain-rate sensitivity of commercial purity Aluminium (Al 99.5) and of α-iron, with both conventional (CG) and ultrafine (UFG) grain sizes, are investigated by compression and tension tests at different temperatures. Microstructural investigations were performed before and after compression testing in order to investigate the ...
Höppel, H. +3 more
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Plastic deformation of ultrafine-grained metallic materials
Russian Metallurgy (Metally), 2015The micromechanisms of plastic deformation of ultrafine-grained metallic materials are analyzed using copper, the nanostructure of which is produced by equal-channel angular pressing, as an example. Slip traces are studied at various deformation stages, and their parameters are estimated. The change in the granular structure during deformation has been
E. V. Kozlov, N. A. Popova, N. A. Koneva
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Processing ultrafine-grained and nanostructured materials
2021Farid Z. Utyashev +2 more
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