ULTRA-FINE GRAINED COPPER PREPARED BY HIGH-PRESSURE TORSION: A POSITRON ANNIHILATION STUDY OF MICROSTRUCTURE EVOLUTION AND LATERAL DISTRIBUTION OF DEFECTS

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F11%3A10105482" target="_blank" >RIV/00216208:11320/11:10105482 - isvavai.cz</a>

Výsledek na webu

<a href="http://www.nanocon.cz/files/proceedings/nanocon_11/lists/papers/1260.pdf" target="_blank" >http://www.nanocon.cz/files/proceedings/nanocon_11/lists/papers/1260.pdf</a>

DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

ULTRA-FINE GRAINED COPPER PREPARED BY HIGH-PRESSURE TORSION: A POSITRON ANNIHILATION STUDY OF MICROSTRUCTURE EVOLUTION AND LATERAL DISTRIBUTION OF DEFECTS

Popis výsledku v původním jazyce

A defect study of ultra-fine grained (UFG) Cu prepared by high-pressure torsion (HPT) will be reported. HPT introduces a huge amount of defects (vacancies, dislocations) what makes HPT-made materials a challenge for positron annihilation spectroscopy (PAS) because of PAS non-destructivity and excellent sensitivity to open-volume defects. Thus, conventional PAS including positron lifetime (PLT) and Doppler broadening (DB) techniques was the main experimental tool. PAS was combined with transmission electron microscopy, X-ray diffraction and Vickers microhardness (HV) measurements. Lattice defects introduced by HPT were characterized first. A very high concentration of defects created during HPT deformation was observed and the two kinds of defects couldbe identified: dislocations and small vacancy clusters (microvoids). Because of a significant increase in imposed shear strain with radial distance, microstructure of a HPT-deformed sample at the centre is expected to differ from that at

Název v anglickém jazyce

ULTRA-FINE GRAINED COPPER PREPARED BY HIGH-PRESSURE TORSION: A POSITRON ANNIHILATION STUDY OF MICROSTRUCTURE EVOLUTION AND LATERAL DISTRIBUTION OF DEFECTS

Popis výsledku anglicky

A defect study of ultra-fine grained (UFG) Cu prepared by high-pressure torsion (HPT) will be reported. HPT introduces a huge amount of defects (vacancies, dislocations) what makes HPT-made materials a challenge for positron annihilation spectroscopy (PAS) because of PAS non-destructivity and excellent sensitivity to open-volume defects. Thus, conventional PAS including positron lifetime (PLT) and Doppler broadening (DB) techniques was the main experimental tool. PAS was combined with transmission electron microscopy, X-ray diffraction and Vickers microhardness (HV) measurements. Lattice defects introduced by HPT were characterized first. A very high concentration of defects created during HPT deformation was observed and the two kinds of defects couldbe identified: dislocations and small vacancy clusters (microvoids). Because of a significant increase in imposed shear strain with radial distance, microstructure of a HPT-deformed sample at the centre is expected to differ from that at

Druh

D - Stať ve sborníku

CEP obor

BM - Fyzika pevných látek a magnetismus

OECD FORD obor

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Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>Z - Vyzkumny zamer (s odkazem do CEZ)<br>S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2011

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

NANOCON 2011, 3rd INTERNATIONAL CONFERENCE

ISBN

978-80-87294-27-7

ISSN

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e-ISSN

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Počet stran výsledku

6

Strana od-do

231-237

Název nakladatele

TANGER Ltd.

Místo vydání

Ostrava

Místo konání akce

Brno

Datum konání akce

21. 9. 2011

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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