About: Microstructure development and lateral distribution of defects in ultra-fine grained copper prepared by high-pressure torsion

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About: Microstructure development and lateral distribution of defects in ultra-fine grained copper prepared by high-pressure torsion Goto Sponge NotDistinct Permalink

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Attributes	Values
rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
rdfs:seeAlso	http://www.sciencedirect.com/science/article/pii/S1875389212019396
Description	A defect study of ultra-fine grained (UFG) Cu prepared by high-pressure torsion (HPT) will be reported. Conventional positron annihilation spectroscopy (PAS) including positron lifetime (PLT) and Doppler broadening (DB) techniques was employed as the main experimental tool. PAS was combined with transmission electron microscopy, X-ray diffraction and Vickers microhardness (HV) measurements. First, lattice defects introduced by HPT were characterized. A very high concentration of defects created during HPT deformation was observed and the two kinds of defects could be identified: dislocations and small vacancy clusters (microvoids). Further investigations were focused on (i) the radial distributions of defects and (ii) the evolution of microstructure during HPT processing. The results of the present study are consistent with an increase of shear strain from the sample centre toward its periphery. Extended lateral mapping of microstructure was performed using HV and DB techniques. The latter one reveals a significant non-uniformity of defect distribution which was less pronounced in the HV measurements. A defect study of ultra-fine grained (UFG) Cu prepared by high-pressure torsion (HPT) will be reported. Conventional positron annihilation spectroscopy (PAS) including positron lifetime (PLT) and Doppler broadening (DB) techniques was employed as the main experimental tool. PAS was combined with transmission electron microscopy, X-ray diffraction and Vickers microhardness (HV) measurements. First, lattice defects introduced by HPT were characterized. A very high concentration of defects created during HPT deformation was observed and the two kinds of defects could be identified: dislocations and small vacancy clusters (microvoids). Further investigations were focused on (i) the radial distributions of defects and (ii) the evolution of microstructure during HPT processing. The results of the present study are consistent with an increase of shear strain from the sample centre toward its periphery. Extended lateral mapping of microstructure was performed using HV and DB techniques. The latter one reveals a significant non-uniformity of defect distribution which was less pronounced in the HV measurements. (en)
Title	Microstructure development and lateral distribution of defects in ultra-fine grained copper prepared by high-pressure torsion Microstructure development and lateral distribution of defects in ultra-fine grained copper prepared by high-pressure torsion (en)
skos:prefLabel	Microstructure development and lateral distribution of defects in ultra-fine grained copper prepared by high-pressure torsion Microstructure development and lateral distribution of defects in ultra-fine grained copper prepared by high-pressure torsion (en)
skos:notation	RIV/00216208:11320/12:10129929!RIV13-AV0-11320___
http://linked.open...avai/predkladatel	Matematicko-fyzikální fakulta
http://linked.open...avai/riv/aktivita	P S Z
http://linked.open...avai/riv/aktivity	P(IAA101120803), P(KAN300100801), S, Z(MSM0021620834)
http://linked.open...iv/cisloPeriodika	July 2012
http://linked.open...vai/riv/dodaniDat	2013
http://linked.open...aciTvurceVysledku	Janeček, Miloš Kužel, Radomír Melikhova, Oksana Procházka, Ivan Čížek, Jakub Srba, Ondřej Barnovská, Zuzana
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Univerzita Karlova v Praze / Matematicko-fyzikální fakulta
http://linked.open...dnocenehoVysledku	150430
http://linked.open...ai/riv/idVysledku	RIV/00216208:11320/12:10129929
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	positron annihilation spectroscopy; microvoids; dislocations; lateral distribution of defects; high-pressure torsion; Ultra-fine grained copper (en)
http://linked.open.../riv/klicoveSlovo	dislocations lateral distribution of defects Ultra-fine grained copper microvoids positron annihilation spectroscopy high-pressure torsion
http://linked.open...odStatuVydavatele	NL - Nizozemsko
http://linked.open...ontrolniKodProRIV	[5705EBD11B34]
http://linked.open...i/riv/nazevZdroje	Physics Procedia
http://linked.open...in/vavai/riv/obor	BM
http://linked.open...ichTvurcuVysledku	7 (xsd:int)
http://linked.open...cetTvurcuVysledku	8 (xsd:int)
http://linked.open...vavai/riv/projekt	Structure stability of fine-grained materials prepared by severe plastic deformation Multifunctional bulk metallic materials with nanocrystalline and ultrafine-grained structure
http://linked.open...UplatneniVysledku	2012
http://linked.open...v/svazekPeriodika	35
http://linked.open...iv/tvurceVysledku	Janeček, Miloš Melikhova, Oksana Procházka, Ivan Čížek, Jakub Kužel, Radomír Barnovská, Zuzana Srba, Ondřej Dobatkin, Sergej V.
http://linked.open...ain/vavai/riv/wos	000314358300001
http://linked.open...n/vavai/riv/zamer	Condensed Matter Physics – New Materials and Technologies
issn	1875-3892
number of pages	6 (xsd:int)
http://bibframe.org/vocab/doi	10.1016/j.phpro.2012.06.002
http://localhost/t...ganizacniJednotka	11320
is http://linked.open...avai/riv/vysledek of	Microstructure development and lateral distribution of defects in ultra-fine grained copper prepared by high-pressure torsion

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