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Published in: Journal of Materials Science 12/2011

01-06-2011 | IIB 2010

Inverse temperature dependence of activation volume in ultrafine-grained copper processed by accumulative roll-bonding

Authors: Takahiro Kunimine, Takashi Aragaki, Toshiyuki Fujii, Susumu Onaka, Masaharu Kato

Published in: Journal of Materials Science | Issue 12/2011

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Abstract

Tensile tests and strain-rate jump tests were carried out at several temperatures below room temperature on Cu processed by accumulative roll-bonding (ARB). The temperature dependences of the flow stress and the activation volume were determined. In contrast to conventional coarse-grained materials where the activation volume increases with increasing temperature, the ARB processed copper by 8 cycles with ultrafine-grains showed inverse temperature dependence of activation volume, i.e., decreased activation volume with increasing temperature. This inverse temperature dependence of the activation volume is discussed in terms of thermally activated dislocation bow-out from grain-boundaries.

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Appendix
Available only for authorised users
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Metadata
Title
Inverse temperature dependence of activation volume in ultrafine-grained copper processed by accumulative roll-bonding
Authors
Takahiro Kunimine
Takashi Aragaki
Toshiyuki Fujii
Susumu Onaka
Masaharu Kato
Publication date
01-06-2011
Publisher
Springer US
Published in
Journal of Materials Science / Issue 12/2011
Print ISSN: 0022-2461
Electronic ISSN: 1573-4803
DOI
https://doi.org/10.1007/s10853-010-5243-4

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