Initiation of fatigue cracks in ultrafine-grained copper

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081723%3A_____%2F12%3A00386069" target="_blank" >RIV/68081723:_____/12:00386069 - isvavai.cz</a>

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Initiation of fatigue cracks in ultrafine-grained copper

Original language description

Ultrafine-grained copper of commercial purity produced by ECAP technique was tested in fatigue in the range of lives from 5x103 to 2x1010 cycles. The fatigue strength of ultrafine-grained copper is by a factor of 2 higher than that of conventional-grained copper. The density of surface slip bands decreases with the decreasing stress amplitude and is extremely low in the very-high-cycle region. Fatigue microcracks were found to initiate in cyclic slip bands, which run across many grains in regions of near-by oriented grains. The very first fatigue damage in high-cycle and very-high-cycle regions consists in formation of cavities and elongated voids representing crack nuclei. No grain coarsening was observed either in bulk or in areas underneath the surface slip markings.

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

JL - Fatigue and fracture mechanics

OECD FORD branch

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Project

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Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2012

Confidentiality

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

Name of the periodical

Kovové materiály

ISSN

0023-432X

e-ISSN

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Volume of the periodical

50

Issue of the periodical within the volume

6

Country of publishing house

SK - SLOVAKIA

Number of pages

7

Pages from-to

407-419

UT code for WoS article

000313460300006

EID of the result in the Scopus database

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