Influence of gigacycle fatigue on development of surface relief in UFG 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

Influence of gigacycle fatigue on development of surface relief in UFG copper

Popis výsledku v původním jazyce

The paper deals with localization of cyclic plasticity in ultrafine-grained copper in gigacycle fatigue regime. The studied copper was prepared by equal channel angular pressing. The cyclic loading was conducted at 20 kHz frequency. It has been found that the cyclic slip bands do not appear well below the fatigue limit, contrary to the conventionally grained copper. Cyclic slip bands develop in "near-by oriented regions". The length of the cyclic slip bands in these regions exceeds substantially the average grain size. The density of cyclic slip bands in specimens, which failed at 10^10 cycles, is very low. Observation of surface relief and microstructure of cyclic slip bands by means focused ion beam technique in scanning electron microscope revealedthe development of damage below the surface extrusions which finally results in fatigue crack initiation.

Název v anglickém jazyce

Influence of gigacycle fatigue on development of surface relief in UFG copper

Popis výsledku anglicky

The paper deals with localization of cyclic plasticity in ultrafine-grained copper in gigacycle fatigue regime. The studied copper was prepared by equal channel angular pressing. The cyclic loading was conducted at 20 kHz frequency. It has been found that the cyclic slip bands do not appear well below the fatigue limit, contrary to the conventionally grained copper. Cyclic slip bands develop in "near-by oriented regions". The length of the cyclic slip bands in these regions exceeds substantially the average grain size. The density of cyclic slip bands in specimens, which failed at 10^10 cycles, is very low. Observation of surface relief and microstructure of cyclic slip bands by means focused ion beam technique in scanning electron microscope revealedthe development of damage below the surface extrusions which finally results in fatigue crack initiation.

Druh

D - Stať ve sborníku

CEP obor

JL - Únava materiálu a lomová mechanika

OECD FORD obor

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Projekt

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Návaznosti

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

TRANSCOM 2011, 9-th EUROPEAN CONFERENCE OF YOUNG RESEARCH AND SCIENTIFIC WORKERS

ISBN

978-80-554-0374-8

ISSN

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e-ISSN

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Počet stran výsledku

4

Strana od-do

129-132

Název nakladatele

EDIS - Žilina University publisher

Místo vydání

Žilina

Místo konání akce

Žilina

Datum konání akce

27. 6. 2011

Typ akce podle státní příslušnosti

EUR - Evropská akce

Kód UT WoS článku

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