Near-threshold propagation of mode II and mode III fatigue cracks in ferrite and austenite

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26620%2F13%3APU103399" target="_blank" >RIV/00216305:26620/13:PU103399 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1016/j.actamat.2013.04.033" target="_blank" >http://dx.doi.org/10.1016/j.actamat.2013.04.033</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.actamat.2013.04.033" target="_blank" >10.1016/j.actamat.2013.04.033</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Near-threshold propagation of mode II and mode III fatigue cracks in ferrite and austenite

Popis výsledku v původním jazyce

The near-threshold behavior of mode II and mode III long fatigue cracks in ferritic (ARMCO iron) and austenitic (X5CrNi18-10) steel were experimentally studied using various samples specially prepared to obtain the effective threshold values deltaKIIeff,th and deltaKIIIeff,th. In both investigated materials, the effective thresholds for mode III were about 1.7 times higher than those for mode II. 3D topological data obtained by the examination of fracture surfaces using stereophotogrammetry were utilized to identify crack growth micromechanisms. In austenite, mode I branching of both the mode II and mode III cracks started at the very onset of crack growth. On the other hand, all cracks in ferrite propagated in crystallographically-assisted local mixedmode I + II + III with mode II dominance. These experimental results can be understood in terms of crack growth micromechanisms according to a deformation model in ferrite and a decohesion model in austenite. The dissimilarity of growth

Název v anglickém jazyce

Near-threshold propagation of mode II and mode III fatigue cracks in ferrite and austenite

Popis výsledku anglicky

The near-threshold behavior of mode II and mode III long fatigue cracks in ferritic (ARMCO iron) and austenitic (X5CrNi18-10) steel were experimentally studied using various samples specially prepared to obtain the effective threshold values deltaKIIeff,th and deltaKIIIeff,th. In both investigated materials, the effective thresholds for mode III were about 1.7 times higher than those for mode II. 3D topological data obtained by the examination of fracture surfaces using stereophotogrammetry were utilized to identify crack growth micromechanisms. In austenite, mode I branching of both the mode II and mode III cracks started at the very onset of crack growth. On the other hand, all cracks in ferrite propagated in crystallographically-assisted local mixedmode I + II + III with mode II dominance. These experimental results can be understood in terms of crack growth micromechanisms according to a deformation model in ferrite and a decohesion model in austenite. The dissimilarity of growth

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

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

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2013

Kód důvěrnosti údajů

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

Název periodika

Acta materialia

ISSN

1359-6454

e-ISSN

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Svazek periodika

61

Číslo periodika v rámci svazku

12

Stát vydavatele periodika

CZ - Česká republika

Počet stran výsledku

11

Strana od-do

4625-4635

Kód UT WoS článku

000321086100030

EID výsledku v databázi Scopus

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