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Diffraction contrast tomography for the study of polycrystalline stainless steel microstructures and stress corrosion cracking

Published online by Cambridge University Press:  01 September 2011

A. King ,
W. Ludwig ,
D. Engelberg  and
T. J. Marrow
A. King
Affiliation:
GKSS research centre, Geesthacht, Germany. e-mail: [email protected] ESRF, Grenoble, and MATEIS, INSA de Lyon, Villeurbanne, France; e-mail: [email protected] ,
W. Ludwig
Affiliation:
ESRF, Grenoble, and MATEIS, INSA de Lyon, Villeurbanne, France; e-mail: [email protected] ,
D. Engelberg
Affiliation:
School of Materials, Manchester University, UK; e-mail: [email protected]
T. J. Marrow
Affiliation:
Materials Performance Centre, Manchester University, UK; e-mail: [email protected]
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Abstract

X-ray diffraction contrast tomography is a non-destructive technique for the 3D characterisation of polycrystalline microstructures containing up to a few 1000 grains. The sample is illuminated with a monochromatic beam of high energy synchrotron radiation. As the sample is rotated, and as grains pass through alignments for Bragg diffraction, diffraction spots are recorded on a 2D detector placed close behind the sample. The diffraction geometry is used to assign spots to the grains from which they arise, and to determine the crystallographic orientations of grains. The spots are used as projections of the grains to reconstruct the grain shapes. The technique has been applied to several materials science investigations in stainless steels, including the 3D characterisation of grain boundary networks, and in-situ studies of intergranular stress corrosion cracking.

Keywords

Diffraction contrast tomographysynchrotron radiationstainless steelstress corrosion crackingTomographie en contraste de diffractionsynchrotronacier inoxydablecorrosion inter granulaire sous contraintes
Type
Research Article
Information
Metallurgical Research & Technology , Volume 108 , Issue 1: Numéro thématique sur les aciers inoxydables , 2011 , pp. 47 - 50
Copyright
© EDP Sciences, 2011

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References

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