Detail publikace

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

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

Originální název

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

Typ

článek v časopise - ostatní, Jost

Jazyk

angličtina

Originální abstrakt

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.

Klíčová slova

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

Autoři

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

Rok RIV

2011

Vydáno

25. 4. 2011

ISSN

0921-5093

Periodikum

Materials Science and Engineering A

Ročník

528

Číslo

22-23

Stát

Švýcarská konfederace

Strany od

7036

Strany do

7040

Strany počet

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",
  year="2011",
  volume="528",
  number="22-23",
  pages="7036--7040",
  issn="0921-5093"
}