Detail publikace

Fatigue Property of UFG Cu by ECAP

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

Český název

Fatigue Property of UFG Cu by ECAP

Anglický název

Fatigue Property of UFG Cu by ECAP

Typ

článek v časopise - ostatní, Jost

Jazyk

zh

Originální abstrakt

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.

Český abstrakt

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.

Anglický abstrakt

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.

Klíčová slova česky

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

Klíčová slova anglicky

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

Rok RIV

2007

Vydáno

01.05.2007

Místo

Čína

ISSN

0412-1961

Časopis

ACTA METALLURGICA SINICA

Ročník

43

Číslo

5

Strany od–do

498–502

Počet stran

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"
}