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Fracture Toughness and Internal Friction of GlidCop®Al-25 Alloy

Published online by Cambridge University Press:  15 February 2011

S. Tähtinen ,
M. Pyykkönen ,
S. Smuk ,
H. Hänninen ,
Y. Jagodzinski  and
O. Tarasenko
S. Tähtinen
Affiliation:
VTT Manufacturing Technology, P.O. Box 1704, FIN-02044, Finland
M. Pyykkönen
Affiliation:
VTT Manufacturing Technology, P.O. Box 1704, FIN-02044, Finland
S. Smuk
Affiliation:
Laboratory of Engineering Materials, Helsinki University of Technology, P.O. Box 4200, FIN-02015 HUT, Finland
H. Hänninen
Affiliation:
Laboratory of Engineering Materials, Helsinki University of Technology, P.O. Box 4200, FIN-02015 HUT, Finland
Y. Jagodzinski
Affiliation:
Institute for Metal Physics, National Academy of Sciences of Ukraine, Vernadski blvd. 36, 252142, Kiev, Ukraine
O. Tarasenko
Affiliation:
Institute for Metal Physics, National Academy of Sciences of Ukraine, Vernadski blvd. 36, 252142, Kiev, Ukraine
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Abstract

Fracture toughness was found to decrease rapidly with increasing temperature in dispersionstrengthened GlidCop®Al-25 copper alloy both in the as-supplied condition and neutron irradiated to a dose of 0.3 dpa. Internal friction study revealed two-component peak. Grain-boundary sliding was recognized to be responsible for the low-temperature component of the peak, which disappears after irradiation and restores after the heating above 900 K. This points out that the changes in the particle — grain boundary interaction, apparently, due to the defects at the interfaces produced by irradiation are responsible for the drop of fracture toughness in A125 alloy.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 540: Symposium N / Microstructural Processes in Irradiated Materials , 1998 , 573
Copyright
Copyright © Materials Research Society 1999

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