Strain localization and fatigue crack initiation in ultrafine-grained copper in high- and giga-cycle region

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081723%3A_____%2F14%3A00434886" target="_blank" >RIV/68081723:_____/14:00434886 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1016/j.ijfatigue.2013.04.027" target="_blank" >http://dx.doi.org/10.1016/j.ijfatigue.2013.04.027</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.ijfatigue.2013.04.027" target="_blank" >10.1016/j.ijfatigue.2013.04.027</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Strain localization and fatigue crack initiation in ultrafine-grained copper in high- and giga-cycle region

Popis výsledku v původním jazyce

Initiation of fatigue cracks and early crack propagation in high-cycle and giga-cycle region in ultrafine-grained copper prepared by equal channel angular pressing was experimentally investigated. The cyclic slip localization takes place in cyclic slip bands whose length substantially exceeds the grain size. The mechanism of the crack initiation under load controlled cycling does not require the dynamic grain coarsening often indicated in literature. Fatigue cracks initiate in slip bands, which developpredominantly in zones of near-by oriented grains. The damage mechanism consists in localized slip resulting in development of cavities and voids arranged along the planes of highest cyclic shear stress and in formation of surface relief. A process of growth and linking of cavities and voids produced by the irreversible cyclic slip by dislocation movement generating point defects governs the early stage of the development of fatigue cracks. Sufficiently large cracks created by this mecha

Název v anglickém jazyce

Strain localization and fatigue crack initiation in ultrafine-grained copper in high- and giga-cycle region

Popis výsledku anglicky

Initiation of fatigue cracks and early crack propagation in high-cycle and giga-cycle region in ultrafine-grained copper prepared by equal channel angular pressing was experimentally investigated. The cyclic slip localization takes place in cyclic slip bands whose length substantially exceeds the grain size. The mechanism of the crack initiation under load controlled cycling does not require the dynamic grain coarsening often indicated in literature. Fatigue cracks initiate in slip bands, which developpredominantly in zones of near-by oriented grains. The damage mechanism consists in localized slip resulting in development of cavities and voids arranged along the planes of highest cyclic shear stress and in formation of surface relief. A process of growth and linking of cavities and voids produced by the irreversible cyclic slip by dislocation movement generating point defects governs the early stage of the development of fatigue cracks. Sufficiently large cracks created by this mecha

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

JL - Únava materiálu a lomová mechanika

OECD FORD obor

—

Projekt

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

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2014

Kód důvěrnosti údajů

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

Název periodika

International Journal of Fatigue

ISSN

0142-1123

e-ISSN

—

Svazek periodika

58

Číslo periodika v rámci svazku

JAN

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

7

Strana od-do

202-208

Kód UT WoS článku

000328592700024

EID výsledku v databázi Scopus

—