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

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F12%3A10129929" target="_blank" >RIV/00216208:11320/12:10129929 - isvavai.cz</a>

Výsledek na webu

<a href="http://www.sciencedirect.com/science/article/pii/S1875389212019396" target="_blank" >http://www.sciencedirect.com/science/article/pii/S1875389212019396</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.phpro.2012.06.002" target="_blank" >10.1016/j.phpro.2012.06.002</a>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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 la

Název v anglickém jazyce

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

Popis výsledku anglicky

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 la

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

2012

Kód důvěrnosti údajů

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

Název periodika

Physics Procedia

ISSN

1875-3892

e-ISSN

—

Svazek periodika

35

Číslo periodika v rámci svazku

July 2012

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

6

Strana od-do

4-9

Kód UT WoS článku

000314358300001

EID výsledku v databázi Scopus

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