In Situ SEM/EBSD analysis of fatigue crack propagation behavior of a super duplex stainless steel

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26210%2F08%3APU103146" target="_blank" >RIV/00216305:26210/08:PU103146 - 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

In Situ SEM/EBSD analysis of fatigue crack propagation behavior of a super duplex stainless steel

Popis výsledku v původním jazyce

Fatigue crack branching and deflection behaviour in an UNS S32750 (SAF 2507) duplex stainless steel has been investigated using an In-situ SEM/EBSD fatigue test and a conventional da/dN methodology. Occurrence of crack branching results mainly from the extrusions and intrusions of slip bands developed in the grains. The number of crack branches formed depends strongly on the loading condition and the microstructure of the material. The in-situ observation confirms that the formation of crack branches can significantly reduce the crack propagation rate that leads to crack growth retardation in the main mode I crack path. The crack branches formed are usually not ideal. They can propagate almost transversely to the main crack direction with a mode II stress intensity factor, SIF, and a rate that is much higher than that of the main crack. Crack deflection occurs mainly at the phase boundaries. A high crack deflection can also lead to a crack growth retardation. The high crack deflection

Název v anglickém jazyce

In Situ SEM/EBSD analysis of fatigue crack propagation behavior of a super duplex stainless steel

Popis výsledku anglicky

Fatigue crack branching and deflection behaviour in an UNS S32750 (SAF 2507) duplex stainless steel has been investigated using an In-situ SEM/EBSD fatigue test and a conventional da/dN methodology. Occurrence of crack branching results mainly from the extrusions and intrusions of slip bands developed in the grains. The number of crack branches formed depends strongly on the loading condition and the microstructure of the material. The in-situ observation confirms that the formation of crack branches can significantly reduce the crack propagation rate that leads to crack growth retardation in the main mode I crack path. The crack branches formed are usually not ideal. They can propagate almost transversely to the main crack direction with a mode II stress intensity factor, SIF, and a rate that is much higher than that of the main crack. Crack deflection occurs mainly at the phase boundaries. A high crack deflection can also lead to a crack growth retardation. The high crack deflection

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

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2008

Kód důvěrnosti údajů

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

Název statě ve sborníku

Multilevel Approach to Fracture of Materials, Components and Structures (ECF17)

ISBN

9781617823190

ISSN

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e-ISSN

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Počet stran výsledku

8

Strana od-do

1350-1357

Název nakladatele

Vutium

Místo vydání

Brno

Místo konání akce

Brno

Datum konání akce

2. 9. 2008

Typ akce podle státní příslušnosti

EUR - Evropská akce

Kód UT WoS článku

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