Experimental studies on fundamental mechanisms leading to fatigue crack initiation

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081723%3A_____%2F12%3A00381919" target="_blank" >RIV/68081723:_____/12:00381919 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Experimental studies on fundamental mechanisms leading to fatigue crack initiation

Popis výsledku v původním jazyce

Early stages of surface relief evolution of persistent slip markings (PSMs) in polycrystalline 316L austenitic stainless steel cycled with constant plastic strain amplitude at 93, 173 and 573 K were studied using atomic force microscopy (AFM) and high-resolution scanning electron microscopy (SEM?FEG). Qualitative and quantitative data on the morphology of PSMs, occurrence of extrusions and intrusions and the kinetics of extrusion growth are reported for all temperatures. In all cases PSMs start as surface extrusions which are later, depending on temperature, accompanied by formation of intrusions. This finding is discussed with respect to the point defect formation within areas of localized cyclic slip and especially to their mobility at different temperatures. Consequences of migration of respective point defects for surface relief formation and conditions for creation of fatigue crack embryos, i.e. sharp intrusions are highlighted.

Název v anglickém jazyce

Experimental studies on fundamental mechanisms leading to fatigue crack initiation

Popis výsledku anglicky

Early stages of surface relief evolution of persistent slip markings (PSMs) in polycrystalline 316L austenitic stainless steel cycled with constant plastic strain amplitude at 93, 173 and 573 K were studied using atomic force microscopy (AFM) and high-resolution scanning electron microscopy (SEM?FEG). Qualitative and quantitative data on the morphology of PSMs, occurrence of extrusions and intrusions and the kinetics of extrusion growth are reported for all temperatures. In all cases PSMs start as surface extrusions which are later, depending on temperature, accompanied by formation of intrusions. This finding is discussed with respect to the point defect formation within areas of localized cyclic slip and especially to their mobility at different temperatures. Consequences of migration of respective point defects for surface relief formation and conditions for creation of fatigue crack embryos, i.e. sharp intrusions are highlighted.

Druh

D - Stať ve sborníku

CEP obor

JL - Únava materiálu a lomová mechanika

OECD FORD obor

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Projekt

<a href="/cs/project/GAP108%2F10%2F2371" target="_blank" >GAP108/10/2371: Lokalizace a ireverzibilita cyklického skluzu v polykrystalech</a><br>

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 statě ve sborníku

19th European Conference on Fracture: Fracture Mechanics for Durability, Reliability and Safety

ISBN

978-5-905576-18-8

ISSN

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e-ISSN

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Počet stran výsledku

10

Strana od-do

"Paper No. 266"

Název nakladatele

Kazan Scientific Centre of the RAS

Místo vydání

Kazan

Místo konání akce

Kazan

Datum konání akce

26. 8. 2012

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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