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Deformation Characteristics of Quasicrystalline Al–Cu–Fe Alloys

Published online by Cambridge University Press:  31 January 2011

J. E. Shield  and
M. J. Kramer
J. E. Shield
Affiliation:
Department of Materials Science and Engineering, University of Utah, Salt Lake City, Utah 84112
M. J. Kramer
Affiliation:
Ames Laboratory, United States Department of Energy, Ames, Iowa 50011
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The deformation characteristics of icosahedral Al–Cu–Fe quasicrystals were determined by high temperature creep experiments between 680 and 720 °C and 15 and 41 MPa. The deformation process was determined to be controlled by grain boundary mechanisms. Both the stress and grain size sensitivity exponents were found to be 2, suggesting that grain boundary sliding was the rate-controlling deformation mechanism. Microstructural analysis supported this conclusion, as no intragranular defects were produced during the deformation experiments.

Type
Articles
Information
Journal of Materials Research , Volume 12 , Issue 8 , August 1997 , pp. 2043 - 2047
Copyright
Copyright © Materials Research Society 1997

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