Publication detail

Fatigue Property of UFG Cu by ECAP

WANG, Q. XU, C. ZHENG, M. ZHU, J. BUKSA, M. KUNZ, L.

Czech title

Fatigue Property of UFG Cu by ECAP

English title

Fatigue Property of UFG Cu by ECAP

Type

journal article - other

Language

zh

Original abstract

The fatigue life and cyclic deformation behavior of UFG copper produced by equal channel angular pressing (ECAP) were studied and the changes of the grain size and the development of slip bands are observed by means of SEM electron back scattering diffraction and SEM, respectively. The result shows that the fatigue limit of the UFG copper corresponding to 107 cycles is 153 MPa which is the double of fatigue limit of the coarse grained (CG) copper. Cyclic softening occurs in the low-cycle fatigue region whereas stable cyclic behavior or even cyclic hardening occurs in the high-cycle region. Persistent slip bands (PSB)-like shear bands (SBs) are approximately parallel to the shearing plane of last pressing. The formation of SBs and grain boundary sliding are the main factor causing crack nucleation as well as fatigue failure.

Czech abstract

The fatigue life and cyclic deformation behavior of UFG copper produced by equal channel angular pressing (ECAP) were studied and the changes of the grain size and the development of slip bands are observed by means of SEM electron back scattering diffraction and SEM, respectively. The result shows that the fatigue limit of the UFG copper corresponding to 107 cycles is 153 MPa which is the double of fatigue limit of the coarse grained (CG) copper. Cyclic softening occurs in the low-cycle fatigue region whereas stable cyclic behavior or even cyclic hardening occurs in the high-cycle region. Persistent slip bands (PSB)-like shear bands (SBs) are approximately parallel to the shearing plane of last pressing. The formation of SBs and grain boundary sliding are the main factor causing crack nucleation as well as fatigue failure.

English abstract

The fatigue life and cyclic deformation behavior of UFG copper produced by equal channel angular pressing (ECAP) were studied and the changes of the grain size and the development of slip bands are observed by means of SEM electron back scattering diffraction and SEM, respectively. The result shows that the fatigue limit of the UFG copper corresponding to 107 cycles is 153 MPa which is the double of fatigue limit of the coarse grained (CG) copper. Cyclic softening occurs in the low-cycle fatigue region whereas stable cyclic behavior or even cyclic hardening occurs in the high-cycle region. Persistent slip bands (PSB)-like shear bands (SBs) are approximately parallel to the shearing plane of last pressing. The formation of SBs and grain boundary sliding are the main factor causing crack nucleation as well as fatigue failure.

Keywords in Czech

equal channel angular pressing (ECAP), ultrafine-grained copper, fatigue limit, shear bands

Keywords in English

equal channel angular pressing (ECAP), ultrafine-grained copper, fatigue limit, shear bands

RIV year

2007

Released

01.05.2007

Location

Čína

ISSN

0412-1961

Journal

ACTA METALLURGICA SINICA

Volume

43

Number

5

Pages from–to

498–502

Pages count

5

BIBTEX


@article{BUT44578,
  author="Qingjuan {Wang} and Changzheng {Xu} and Maosheng {Zheng} and Jiewu {Zhu} and Michal {Buksa} and Ludvík {Kunz},
  title="Fatigue Property of UFG Cu by ECAP",
  journal="ACTA METALLURGICA SINICA",
  year="2007",
  volume="43",
  number="5",
  month="May",
  pages="498--502",
  address="Čína",
  issn="0412-1961"
}