Publication detail
Fatigue damage of ultrafine-grain copper in very-high cycle fatigue region
LUKÁŠ, P. KUNZ, L. NAVRÁTILOVÁ, L. BOKŮVKA, O.
English title
Fatigue damage of ultrafine-grain copper in very-high cycle fatigue region
Type
Peer-reviewed article not indexed in WoS or Scopus
Language
en
Original abstract
Ultrafine-grained copper produced by ECAP technique was tested in ultrasonic fatigue in the region of lives from 10^8 to 2x10^10 cycles. The fatigue strength of ultrafine-grained copper is by a factor of 2 higher than that of conventional-grain copper. The occurrence of surface fatigue slip markings is rare. No grain coarsening was observed either in bulk or in areas underneath the surface slip markings. Localized collective grain-boundary slip of near-by oriented grains is considered to be the main damage mechanism leading to fatigue microcrack initiation either directly in the roots of surface intrusions or underneath the surface slip markings.
Keywords in English
very-high cycle region, fatigue, UFG copper, slip markings, crack initiation
Released
2011-04-25
ISSN
0921-5093
Volume
528
Number
22-23
Pages from–to
7036–7040
Pages count
5
BIBTEX
@article{BUT88368,
author="Petr {Lukáš} and Ludvík {Kunz} and Lucie {Navrátilová} and Otakar {Bokůvka}",
title="Fatigue damage of ultrafine-grain copper in very-high cycle fatigue region",
journal="MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING",
year="2011",
volume="528",
number="22-23",
pages="7036--7040",
issn="0921-5093"
}