Odklonění trhliny (110)[001] v monokrystalech alfa-železa zatěžovaných v módu I

Kód výsledku v IS VaVaI

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Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Deflection of the Crack (110)[001] in bcc Iron Crystals Loaded in Mode I

Popis výsledku v původním jazyce

Fracture experiments performed at room temperature on four test samples made of Fe-3wt.%Si single crystals have shown deflections of an edge crack (110)[001] (crack plane, crack front) from the axis [-110] of the potential crack extension of approximately 45o. This behavior has appeared to be independent on loading rate. Fractographic analysis confirmed that the cracks were deviated along {100} planes and the fracture was accompanied by slip on {011} planes and by twinning on {112} planes. 3D simulations at 300 K by molecular dynamic technique in bcc iron with edge cracks of equivalent orientation indicated that the crack itself could contribute to understanding of this behavior by 3 processes: twinning on oblique {112} planes, which hindered growth ofthe original crack, and by emission of dislocations on oblique {011} and {123} planes, which led to separation of the {100} planes and might cause decohesion and subsequent cleavage fracture along mentioned planes.

Název v anglickém jazyce

Deflection of the Crack (110)[001] in bcc Iron Crystals Loaded in Mode I

Popis výsledku anglicky

Fracture experiments performed at room temperature on four test samples made of Fe-3wt.%Si single crystals have shown deflections of an edge crack (110)[001] (crack plane, crack front) from the axis [-110] of the potential crack extension of approximately 45o. This behavior has appeared to be independent on loading rate. Fractographic analysis confirmed that the cracks were deviated along {100} planes and the fracture was accompanied by slip on {011} planes and by twinning on {112} planes. 3D simulations at 300 K by molecular dynamic technique in bcc iron with edge cracks of equivalent orientation indicated that the crack itself could contribute to understanding of this behavior by 3 processes: twinning on oblique {112} planes, which hindered growth ofthe original crack, and by emission of dislocations on oblique {011} and {123} planes, which led to separation of the {100} planes and might cause decohesion and subsequent cleavage fracture along mentioned planes.

Druh

D - Stať ve sborníku

CEP obor

JG - Hutnictví, kovové materiály

OECD FORD obor

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Projekt

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Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2008

Kód důvěrnosti údajů

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

Název statě ve sborníku

Proceedings ECF17 - Multilevel Approach to Fracture of Materials, Components and Structures

ISBN

978-80-214-3692-3

ISSN

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e-ISSN

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Počet stran výsledku

8

Strana od-do

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Název nakladatele

VUTIUM Press

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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