Results 251 to 260 of about 252,373 (307)

Structure and properties of ultrafine-grained materials produced by severe plastic deformation

Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing, 1993
R. Valiev, A. Korznikov, R. Mulyukov
semanticscholar   +3 more sources

Cellular activity of bioactive nanograined/ultrafine-grained materials

Acta Biomaterialia, 2010
Our 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, W W, Thein-Han, S A, Mali, M C, Somani, L P, Karjalainen   +4 more
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Plastic deformation of ultrafine-grained metallic materials

Russian Metallurgy (Metally), 2015
The 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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Strain-rate sensitivity of ultrafine-grained materials

Zeitschrift für Metallkunde, 2005
Abstract 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., May, J., Eisenlohr, P., Göken, M.   +3 more
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Erosion of conventional and ultrafine-grained materials

Thin Solid Films, 1984
Abstract The erosion behavior was investigated of wear-resistant coatings of SiSiC and WWC applied to steel and graphite substrates using the controlled nucleation thermochemical deposition (CNTD) process, a refinement of the chemical vapor deposition (CVD) process.
G. Hickey, D. Boone, A. Levy, J. Stiglich   +3 more
openaire   +1 more source

Highly efficient thermoelectric cooling performance of ultrafine-grained and nanoporous materials

Materials Today, 2023
Liangjun Xie, Jiawei Yang, Ziyu Liu, Nuo Qu, Xingyan Dong, Jianbo Zhu, Wenjing Shi, Hao Wu, Guyang Peng, F. Guo, Yang Zhang, Wei Cai, Haijun Wu, Hangtian Zhu, Huaizhou Zhao, Zihang Liu, J. Sui   +16 more
semanticscholar   +1 more source

Analysis of precipitates in ultrafine-grained metallic materials

Philosophical Magazine, 2018
ABSTRACTIn 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, R.K. Islamgaliev, M.A. Nikitina, G.F. Sitdikova, K. X. Wei, I.V. Alexandrov, W. Wei   +6 more
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Phase boundary segregation-induced strengthening and discontinuous yielding in ultrafine-grained duplex medium-Mn steels

, 2020
The combination of different phase constituents to realize a mechanical composite effect for superior strength-ductility synergy has become an important strategy in microstructure design in advanced high-strength steels.
Yan Ma, Binhan Sun, A. Schökel, Wenwen Song, D. Ponge, D. Raabe, W. Bleck   +6 more
semanticscholar   +1 more source

Inelastic recovery in nano and ultrafine grained materials

Modelling and Simulation in Materials Science and Engineering, 2016
Ultrafine 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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The Flow Behavior of Ultrafine-Grained Materials

Advanced Materials Research, 2014
Processing through the application of severe plastic deformation (SPD) leads to very significant grain refinement with grains that are typically in the submicrometer or even the nanometer range. These ultrafine-grained (UFG) materials provide an opportunity for achieving exceptional flow properties including high strength at ambient temperature and, if
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