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Spatially Resolved MicroDiffraction Analysis of the Plastic Deformation in the Shock Recovered Al Single Crystaltal

Published online by Cambridge University Press:  01 February 2011

Rozaliya Barabash ,
G. E. Ice ,
W. Liu ,
J. Belak  and
M. Kumar
Rozaliya Barabash
Affiliation:
barabashr@ornl.gov, Oak Ridge National Laboratory, Materails Science and technology, One bethel Valley Road, Oak Ridge, TN, 37831-6118, United States
G. E. Ice
Affiliation:
icege@ornl.gov, Oak Ridge National Laboratory, Materails Science and technology, One bethel Valley Road, Oak Ridge, TN, 37831, United States
W. Liu
Affiliation:
wliu@anl.gov, Advanced Photon Source, Argonne, IL, 60439, United States
J. Belak
Affiliation:
belak1@llnl.gov, University of California, Lawrence Livermore National Laboratory, Levermore, CA, 94551, United States
M. Kumar
Affiliation:
kumsr@llnl.gov, University of California, Lawrence Livermore National Laboratory, Levermore, CA, 94551, United States
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Abstract

A spatially resolved diffraction method with a sub micrometer-diameter beam and 3D differential aperture technique together with MD simulations, SEM and OIM analysis are applied to understand the arrangements of voids, geometrically necessary dislocations and strain gradient distribution in samples of Al (123) single crystal shocked to incipient spallation fracture. We describe how geometrically necessary dislocations and effective strain gradient alter white beam Laue patterns of the shocked materials. We show how to quantitatively determine the orientation and density of geometrically necessary dislocations in the shock recovered Al samples being initially oriented for single slip.

Keywords

shock loadingdislocationsx-ray diffraction (XRD)
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 929: Symposium II – Materials in Extreme Environments , 2006 , 0929-II02-03
Copyright
Copyright © Materials Research Society 2006

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