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Observations of grain boundary structure in submicrometer-grained Cu and Ni using high-resolution electron microscopy

Published online by Cambridge University Press:  31 January 2011

Zenji Horita ,
David J. Smith ,
Minoru Nemoto ,
Ruslan Z. Valiev  and
Terence G. Langdon
Zenji Horita
Affiliation:
Department of Materials Science and Engineering, Faculty of Engineering 36, Kyushu University, Fukuoka 812-81, Japan
David J. Smith
Affiliation:
Center for Solid State Science and Department of Physics and Astronomy, Arizona State University, Tempe, Arizona 85287
Minoru Nemoto
Affiliation:
Department of Materials Science and Engineering, Faculty of Engineering 36, Kyushu University, Fukuoka 812-81, Japan
Ruslan Z. Valiev
Affiliation:
Institute of Physics of Advanced Materials, Ufa State Aviation Technical University, Ufa 450000, Russia
Terence G. Langdon
Affiliation:
Departments of Materials Science and Mechanical Engineering, University of Southern California, Los Angeles, California 90089-1453
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Extract

Submicrometer-grained (SMG) structures were produced in Cu and Ni using an intense plastic straining technique, and the grain boundaries and their vicinities were observed by high-resolution electron microscopy. The grain boundaries exhibited zigzag configurations with irregular arrangements of facets and steps, and thus they were found to be in a high-energy nonequilibrium state. A similar conclusion was reached earlier for SMG Al–Mg solid solution alloys which have much lower melting points than Cu and Ni, suggesting that nonequilibrium grain boundaries are a typical feature of metals processed by intense plastic straining.

Type
Articles
Information
Journal of Materials Research , Volume 13 , Issue 2 , February 1998 , pp. 446 - 450
Copyright
Copyright © Materials Research Society 1998

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References

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