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Internal Strain Measurements and X-ray Imaging in Interpenetrating-Phase Al2O3/Al Composites

Published online by Cambridge University Press:  01 February 2011

Marcus L. Young ,
Jon D. Almer ,
Ulrich Lienert ,
Kamel Fezzaa ,
Wah-Keat Lee ,
Dean R. Haeffner  and
David C. Dunand
Marcus L. Young
Affiliation:
Department of Materials Science and Engineering, Northwestern University, Evanston, Illinois 60208, U.S.A. Advanced Photon Source, Argonne National Laboratory Argonne, Illinois 60439, U.S.A.
Jon D. Almer
Affiliation:
Advanced Photon Source, Argonne National Laboratory Argonne, Illinois 60439, U.S.A.
Ulrich Lienert
Affiliation:
Advanced Photon Source, Argonne National Laboratory Argonne, Illinois 60439, U.S.A.
Kamel Fezzaa
Affiliation:
Advanced Photon Source, Argonne National Laboratory Argonne, Illinois 60439, U.S.A.
Wah-Keat Lee
Affiliation:
Advanced Photon Source, Argonne National Laboratory Argonne, Illinois 60439, U.S.A.
Dean R. Haeffner
Affiliation:
Advanced Photon Source, Argonne National Laboratory Argonne, Illinois 60439, U.S.A.
David C. Dunand
Affiliation:
Department of Materials Science and Engineering, Northwestern University, Evanston, Illinois 60208, U.S.A.
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Abstract

Interpenetrating Al2O3/Al composites were created by liquid-metal infiltration of alumina preforms with three-dimensional periodicity produced by a robotic deposition method. Volume-averaged lattice strains in the alumina phase were measured by synchrotron x-ray diffraction at various uniaxial compression stresses up to 350 MPa. Load transfer, which is experimentally found to occur between the aluminum and the alumina phase, is in agreement with simple rule of mixtures models. Spatially resolved measurements showed variations in load transfer at different positions within the composite for the elastic-, plastic-, and damage-deformation regimes. Using phase-enhanced imaging, the extent of damage within the composites was observed.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 840: Symposium Q – Neutron and X-Ray Scattering as Probes of Multiscale Phenomena , 2004 , Q7.10
Copyright
Copyright © Materials Research Society 2005

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References

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