Initiation of fatigue cracks in ultrafine-grained copper

Kód výsledku v IS VaVaI

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Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Initiation of fatigue cracks in ultrafine-grained copper

Popis výsledku v původním jazyce

Ultrafine-grained copper of commercial purity produced by ECAP technique was tested in fatigue in the range of lives from 5x103 to 2x1010 cycles. The fatigue strength of ultrafine-grained copper is by a factor of 2 higher than that of conventional-grained copper. The density of surface slip bands decreases with the decreasing stress amplitude and is extremely low in the very-high-cycle region. Fatigue microcracks were found to initiate in cyclic slip bands, which run across many grains in regions of near-by oriented grains. The very first fatigue damage in high-cycle and very-high-cycle regions consists in formation of cavities and elongated voids representing crack nuclei. No grain coarsening was observed either in bulk or in areas underneath the surface slip markings.

Název v anglickém jazyce

Initiation of fatigue cracks in ultrafine-grained copper

Popis výsledku anglicky

Ultrafine-grained copper of commercial purity produced by ECAP technique was tested in fatigue in the range of lives from 5x103 to 2x1010 cycles. The fatigue strength of ultrafine-grained copper is by a factor of 2 higher than that of conventional-grained copper. The density of surface slip bands decreases with the decreasing stress amplitude and is extremely low in the very-high-cycle region. Fatigue microcracks were found to initiate in cyclic slip bands, which run across many grains in regions of near-by oriented grains. The very first fatigue damage in high-cycle and very-high-cycle regions consists in formation of cavities and elongated voids representing crack nuclei. No grain coarsening was observed either in bulk or in areas underneath the surface slip markings.

Druh

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

CEP obor

JL - Únava materiálu a lomová mechanika

OECD FORD obor

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Projekt

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Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2012

Kód důvěrnosti údajů

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

Název periodika

Kovové materiály

ISSN

0023-432X

e-ISSN

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Svazek periodika

50

Číslo periodika v rámci svazku

6

Stát vydavatele periodika

SK - Slovenská republika

Počet stran výsledku

7

Strana od-do

407-419

Kód UT WoS článku

000313460300006

EID výsledku v databázi Scopus

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