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

Result code in 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>
Result on the web
<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>

Result language
angličtina
Original language name
Near-threshold propagation of mode II and mode III fatigue cracks in ferrite and austenite
Original language description
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
Czech name
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Czech description
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Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
JL - Fatigue and fracture mechanics
OECD FORD branch
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Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2013
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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