Fatigue behaviour of AZ91 magnesium alloy in as-cast and severe plastic deformed conditions

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081723%3A_____%2F14%3A00434750" target="_blank" >RIV/68081723:_____/14:00434750 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216305:26620/14:PU111321

Výsledek na webu

<a href="http://dx.doi.org/10.4028/www.scientific.net/AMR.891-892.397" target="_blank" >http://dx.doi.org/10.4028/www.scientific.net/AMR.891-892.397</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.4028/www.scientific.net/AMR.891-892.397" target="_blank" >10.4028/www.scientific.net/AMR.891-892.397</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Fatigue behaviour of AZ91 magnesium alloy in as-cast and severe plastic deformed conditions

Popis výsledku v původním jazyce

Fatigue strength, crack initiation and microstructure were experimentally investigated in an as-cast AZ91 alloy and in ultrafine-grained (UFG) AZ91 alloy processed by equal channel angular pressing (ECAP). The microstructure after ECAP is bimodal, consisting of fine-grained regions and clusters of larger grains with lower density of intermetallic particles. It has been found that the ECAP substantially increases the tensile strength (factor of two), improves ductility (factor of five) and improves the fatigue strength in low-cycle fatigue region. The improvement of the endurance limit based on 107 cycles is weak. The cyclic slip bands, as sites of the fatigue crack initiation on material surface, were investigated. Focussed ion beam technique (FIB) wasapplied to reveal the surface relief and the microstructure in the vicinity of early fatigue cracks. No grain coarsening was observed in the close vicinity of the initiated cracks. Fatigue cracks in ultrafine-grained structure develop bo

Název v anglickém jazyce

Fatigue behaviour of AZ91 magnesium alloy in as-cast and severe plastic deformed conditions

Popis výsledku anglicky

Fatigue strength, crack initiation and microstructure were experimentally investigated in an as-cast AZ91 alloy and in ultrafine-grained (UFG) AZ91 alloy processed by equal channel angular pressing (ECAP). The microstructure after ECAP is bimodal, consisting of fine-grained regions and clusters of larger grains with lower density of intermetallic particles. It has been found that the ECAP substantially increases the tensile strength (factor of two), improves ductility (factor of five) and improves the fatigue strength in low-cycle fatigue region. The improvement of the endurance limit based on 107 cycles is weak. The cyclic slip bands, as sites of the fatigue crack initiation on material surface, were investigated. Focussed ion beam technique (FIB) wasapplied to reveal the surface relief and the microstructure in the vicinity of early fatigue cracks. No grain coarsening was observed in the close vicinity of the initiated cracks. Fatigue cracks in ultrafine-grained structure develop bo

Druh

D - Stať ve sborníku

CEP obor

JL - Únava materiálu a lomová mechanika

OECD FORD obor

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Projekt

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

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2014

Kód důvěrnosti údajů

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

Název statě ve sborníku

11th International Fatigue Congress

ISBN

978-3-03835-008-8

ISSN

1022-6680

e-ISSN

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Počet stran výsledku

6

Strana od-do

397-402

Název nakladatele

Trans Tech Publications

Místo vydání

Zurich

Místo konání akce

Melbourne

Datum konání akce

2. 3. 2014

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

000337767700061