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Plastic deformation in an Al–Cu–Fe icosahedral alloy

Published online by Cambridge University Press:  31 January 2011

J.E. Shield ,
M.J. Kramer  and
R.W. McCallum
J.E. Shield
Affiliation:
Ames Laboratory, United States Department of Energy, Ames, Iowa 50011-3020
M.J. Kramer
Affiliation:
Ames Laboratory, United States Department of Energy, Ames, Iowa 50011-3020
R.W. McCallum
Affiliation:
Ames Laboratory, United States Department of Energy, Ames, Iowa 50011-3020
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Abstract

Al—Cu—Fe quasicrystalline alloys have been deformed by high-temperature creep between 680 and 740 °C. Deformations greater than 30% were achieved without cracking. Analysis of the data in the quasi-steady state regime reveals power law behavior with a stress exponent of 2.5. The activation energy for deformation was determined to be 640 ± 20 kJ/mole in the temperature region investigated. Transmission electron microscopy revealed lamellar defects which appear similar to twins.

Type
Rapid Communications
Information
Journal of Materials Research , Volume 8 , Issue 6 , June 1993 , pp. 1199 - 1202
Copyright
Copyright © Materials Research Society 1993

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References

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