Publication detail

Microstructural Response of Ultrafine-grained Copper to Fatigue Loading

KUNZ, L. LUKÁŠ, P. BUKSA, M. WANG, Q. ZHENG, M.

Czech title

Mikrostrukturní odezva ultrajemnozrné mědi po únavovém zatížení

English title

Microstructural Response of Ultrafine-grained Copper to Fatigue Loading

Type

journal article - other

Language

en

Original abstract

Fatigue strength of ultra fine-grained copper prepared by equal channel angular pressing has been experimentally studied. It has been found that the fatigue strength in high cycle region and the endurance limit are strongly influenced by both the details of equal angular pressing procedure and the purity of copper. However, the effect of the above mentioned factors on the fatigue strength in low-cycle region is negligible. The ultra fine-grained microstructure has been revealed by optical metallography. The Vickers hardness before and after fatigue was correlated with the cyclic stress-strain response.

Czech abstract

V tomto příspěvku byla studována únavová pevnost ultrajemnozrnné mědi, která byla připravena pomocí ECAP technologie. Bylo zjištěno, že únavová pevnost v oblasti vysokocyklové únavy a mez únavy jsou silně závislé na detailech ECAP procesu a chemické čistotě mědi. Efekt výše uvedených faktorů je v oblasti nízkocyklové únavy pouze zanedbatelný. Pomocí světelné mikroskopie byla studována mikrostruktura UFG Cu a byly porovnány hodnoty tvrdosti před a po cyklickém zatížení.

English abstract

Fatigue strength of ultra fine-grained copper prepared by equal channel angular pressing has been experimentally studied. It has been found that the fatigue strength in high cycle region and the endurance limit are strongly influenced by both the details of equal angular pressing procedure and the purity of copper. However, the effect of the above mentioned factors on the fatigue strength in low-cycle region is negligible. The ultra fine-grained microstructure has been revealed by optical metallography. The Vickers hardness before and after fatigue was correlated with the cyclic stress-strain response.

Keywords in Czech

Ultrajemnozrnná měď, Únava materiálu, Tvrdost, Změkčení/zpevnění

Keywords in English

Ultrafine-grained copper, Fatigue, Hardness, Softening/Hardening

RIV year

2007

Released

02.05.2007

Publisher

Hutnická fakulta - Technická univerzita v Košiciach

Location

Slovensko

ISSN

1335-1532

Volume

13

Number

1

Pages from–to

512–518

Pages count

7

BIBTEX


@article{BUT44075,
  author="Ludvík {Kunz} and Petr {Lukáš} and Michal {Buksa} and Qingjuan {Wang} and Maosheng {Zheng},
  title="Microstructural Response of Ultrafine-grained Copper to Fatigue Loading",
  year="2007",
  volume="13",
  number="1",
  month="May",
  pages="512--518",
  publisher="Hutnická fakulta - Technická univerzita v Košiciach",
  address="Slovensko",
  issn="1335-1532"
}