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Stress Distribution and Tomographic Profiling with Energy Dispersive X-Ray Scattering

Published online by Cambridge University Press:  21 March 2011

Mark Croft ,
Igor Zakharchenko ,
Zhong Zhong ,
Thomas Tsakalakos ,
Yuriy Gulak ,
Zwi. Kalman ,
Jerome Hastings ,
Jingzhu Hu ,
Ronald Holtz  and
Kuntimaddi Sadananda
Mark Croft
Affiliation:
Department of Physics, Rutgers University, Piscataway, NJ 08854
Igor Zakharchenko
Affiliation:
Ceramics Dept, Rutgers University, Piscataway, NJ; 08854
Zhong Zhong
Affiliation:
National Synchrotron Light Source, Brookhaven National Laboratory, Upton, NY; 11973
Thomas Tsakalakos
Affiliation:
Ceramics Dept, Rutgers University, Piscataway, NJ; 08854
Yuriy Gulak
Affiliation:
Ceramics Dept, Rutgers University, Piscataway, NJ; 08854
Zwi. Kalman
Affiliation:
Ceramics Dept, Rutgers University, Piscataway, NJ; 08854
Jerome Hastings
Affiliation:
National Synchrotron Light Source, Brookhaven National Laboratory, Upton, NY; 11973
Jingzhu Hu
Affiliation:
Geophysical Laboratory of Carnegie Institution of Washington, 5251 Broad Branch Rd. NW Washington DC 20015
Ronald Holtz
Affiliation:
Naval Research Laboratory, 4555 Overlook Ave., SW, Washington, DC 20375
Kuntimaddi Sadananda
Affiliation:
Naval Research Laboratory, 4555 Overlook Ave., SW, Washington, DC 20375
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Abstract

Two novel and potentially powerful, x-ray scattering techniques for tomographic profiling of composite materials and for profiling residual strain variation, versus depth, in a specimen are presented. The techniques utilize a high intensity/energy “white” beam synchrotron source and monitor the energy dispersive scattering from a fixed micro-volume as the specimen is scanned through it. The tomographic profiles based on the net scattered intensity and exploiting absorption coefficient/scattering-power variations, can be contrast enhanced by selectively monitoring scattering from specific crystal structures in a composite material. The strain profiling technique is shown to chronicle the detailed internal the stress variation over several mm's of steel. The initial state residual stresses, the effect of a cantilever spring imposed external stress, and their interplay in elastic/plastic deformation are discussed.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 678: Symposia EE – Applications of Synchrotron Radiation Techniques…IV , 2001 , EE2.1.1
Copyright
Copyright © Materials Research Society 2001

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