Evolution of defects in copper deformed by high-pressure torsion

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F11%3A10103809" target="_blank" >RIV/00216208:11320/11:10103809 - isvavai.cz</a>

Výsledek na webu

<a href="http://www.sciencedirect.com/science/article/pii/S1359645410008608" target="_blank" >http://www.sciencedirect.com/science/article/pii/S1359645410008608</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.actamat.2010.12.028" target="_blank" >10.1016/j.actamat.2010.12.028</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Evolution of defects in copper deformed by high-pressure torsion

Popis výsledku v původním jazyce

Lattice defects in Cu deformed by high-pressure torsion (HPT) were investigated by positron annihilation spectroscopy (PAS) combined with transmission electron microscopy, X-ray diffraction (XRD) and Vicker''s microhardness (HV) measurements. The evolution of the microstructure during HPT processing was studied on samples subjected to various numbers of HPT revolutions using pressures of 2 and 4 GPa. Since strain in torsion deformation increases with the radial distance from the center of rotation, onecan expect a non-uniform microstructure across the sample diameter. To examine this, HV was measured at various distances from the center of the HPT-deformed sample and the microstructure at the center was compared with that at the periphery. It was found that HPT-deformed Cu contains a high density of dislocations and also small vacancy clusters formed by the agglomeration of deformation-induced vacancies. The center of the sample exhibits coarser grains, a slightly lower density of dis

Název v anglickém jazyce

Evolution of defects in copper deformed by high-pressure torsion

Popis výsledku anglicky

Lattice defects in Cu deformed by high-pressure torsion (HPT) were investigated by positron annihilation spectroscopy (PAS) combined with transmission electron microscopy, X-ray diffraction (XRD) and Vicker''s microhardness (HV) measurements. The evolution of the microstructure during HPT processing was studied on samples subjected to various numbers of HPT revolutions using pressures of 2 and 4 GPa. Since strain in torsion deformation increases with the radial distance from the center of rotation, onecan expect a non-uniform microstructure across the sample diameter. To examine this, HV was measured at various distances from the center of the HPT-deformed sample and the microstructure at the center was compared with that at the periphery. It was found that HPT-deformed Cu contains a high density of dislocations and also small vacancy clusters formed by the agglomeration of deformation-induced vacancies. The center of the sample exhibits coarser grains, a slightly lower density of dis

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

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 periodika

Acta Materialia

ISSN

1359-6454

e-ISSN

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Svazek periodika

59

Číslo periodika v rámci svazku

6

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

8

Strana od-do

2322-2329

Kód UT WoS článku

000288568500007

EID výsledku v databázi Scopus

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