Publication detail

Stability of ultrafine-grained structure of copper under fatigue loading

KUNZ, L. LUKÁŠ, P. PANTĚLEJEV, L. MAN, O.

Original Title

Stability of ultrafine-grained structure of copper under fatigue loading

English Title

Stability of ultrafine-grained structure of copper under fatigue loading

Type

journal article - other

Language

en

Original Abstract

Stability of microstructure of ultrafine-grained materials under cyclic loading is a crucial condition for their good fatigue performance. Changes of microstructure due to fatigue in bulk, localization of cyclic plasticity into cyclic slip bands and related development of microstructure were experimentally studied on ultrafine-grained copper prepared by equal channel angular pressing. Different reaction of ultrafine-grained structure to plastic strain-controlled and load-controlled tests was found. The different susceptibility to dynamic grain coarsening under load and plastic strain-controlled tests reported in literature cannot be explained by differences in purity or details of equal channel angular pressing. The localization of the cyclic plasticity and the development of cyclic slip bands resulting in fatigue crack initiation take place in material volumes which can be characterized as -near by oriented- regions. They correspond to the shear bands, which are characteristic for ultrafine-grained structure after equal channel angular pressing.

English abstract

Stability of microstructure of ultrafine-grained materials under cyclic loading is a crucial condition for their good fatigue performance. Changes of microstructure due to fatigue in bulk, localization of cyclic plasticity into cyclic slip bands and related development of microstructure were experimentally studied on ultrafine-grained copper prepared by equal channel angular pressing. Different reaction of ultrafine-grained structure to plastic strain-controlled and load-controlled tests was found. The different susceptibility to dynamic grain coarsening under load and plastic strain-controlled tests reported in literature cannot be explained by differences in purity or details of equal channel angular pressing. The localization of the cyclic plasticity and the development of cyclic slip bands resulting in fatigue crack initiation take place in material volumes which can be characterized as -near by oriented- regions. They correspond to the shear bands, which are characteristic for ultrafine-grained structure after equal channel angular pressing.

Keywords

Fatigue of ultrafine-grained Cu, stability of ultrafine-grained structure, cyclic slip bands

RIV year

2011

Released

10.06.2011

Publisher

ELSEVIER

Pages from

201

Pages to

206

Pages count

6

Documents

BibTex


@article{BUT73820,
  author="Ludvík {Kunz} and Petr {Lukáš} and Libor {Pantělejev} and Ondřej {Man}",
  title="Stability of ultrafine-grained structure of copper under fatigue loading",
  annote="Stability of microstructure of ultrafine-grained materials under cyclic loading is a crucial condition for their good fatigue performance. Changes of microstructure due to fatigue in bulk, localization of cyclic plasticity into cyclic slip bands and related development of microstructure were experimentally studied on ultrafine-grained copper prepared by equal channel angular pressing. Different reaction of ultrafine-grained structure to plastic strain-controlled and load-controlled tests was found. The different susceptibility to dynamic grain coarsening under load and plastic strain-controlled tests reported in literature cannot be explained by differences in purity or details of equal channel angular pressing. The localization of the cyclic plasticity and the development of cyclic slip bands resulting in fatigue crack initiation take place in material volumes which can be characterized as -near by oriented- regions. They correspond to the shear bands, which are characteristic for ultrafine-grained structure after equal channel angular pressing.",
  address="ELSEVIER",
  chapter="73820",
  institution="ELSEVIER",
  journal="Procedia Engineering",
  number="ICM11",
  volume="10",
  year="2011",
  month="june",
  pages="201--206",
  publisher="ELSEVIER",
  type="journal article - other"
}