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Mechanism of Achieving Nanocrystalline AIRu By Ball Milling

Published online by Cambridge University Press:  21 February 2011

E. Hellstern ,
H. J. Fecht ,
C. Garland ,
W. L. Johnson  and
W. M. Keck
E. Hellstern
Affiliation:
Laboratory of Engineering Materials, California Institute of Technology, Pasadena, CA 91125, USA
H. J. Fecht
Affiliation:
Laboratory of Engineering Materials, California Institute of Technology, Pasadena, CA 91125, USA
C. Garland
Affiliation:
Laboratory of Engineering Materials, California Institute of Technology, Pasadena, CA 91125, USA
W. L. Johnson
Affiliation:
Laboratory of Engineering Materials, California Institute of Technology, Pasadena, CA 91125, USA
W. M. Keck
Affiliation:
Laboratory of Engineering Materials, California Institute of Technology, Pasadena, CA 91125, USA
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Abstract

We investigated through X- ray diffraction and transmission electron microscopy the crystal refinement of the intermetallic compound AIRu by high- energy ball milling. The deformation process causes a decrease of crystal size to 5–7 rum and an increase of atomic level strain. This deformation is localized in shear bands with a thickness of 0.5 to 1 micron. Within these bands the crystal lattice breaks into small grains with a typical size of 8–14 rum. Further deformation leads to a final nanocrystalline structure with randomly oriented crystallite grains separated by high- angle grain boundaries.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 132: Symposium G – Multicomponent Ultrafine Microstructures , 1988 , 137
Copyright
Copyright © Materials Research Society 1989

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References

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