Publication result detail

Fatigue damage of ultrafine-grain copper in very-high cycle fatigue region

LUKÁŠ, P.; KUNZ, L.; NAVRÁTILOVÁ, L.; BOKŮVKA, O.

Original Title

Fatigue damage of ultrafine-grain copper in very-high cycle fatigue region

English Title

Fatigue damage of ultrafine-grain copper in very-high cycle fatigue region

Type

Peer-reviewed article not indexed in WoS or Scopus

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.

English 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

very-high cycle region, fatigue, UFG copper, slip markings, crack initiation

Key words in English

very-high cycle region, fatigue, UFG copper, slip markings, crack initiation

Authors

LUKÁŠ, P.; KUNZ, L.; NAVRÁTILOVÁ, L.; BOKŮVKA, O.

RIV year

2012

Released

25.04.2011

ISBN

0921-5093

Periodical

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING

Volume

528

Number

22-23

State

Swiss Confederation

Pages from

7036

Pages to

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"
}