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Licensed Unlicensed Requires Authentication Published by De Gruyter May 31, 2013

Neutron Bragg-edge mapping of weld seams

Nikolay Kardjilov , Ingo Manke , André Hilger , Scott Williams , Markus Strobl , Robin Woracek , Mirko Boin , Eberhard Lehmann , Dayakar Penumadu and John Banhart

Abstract

Cold neutrons have a wavelength that is in the same range as the lattice spacings of most polycrystalline metallic materials. Imaging of such materials with monochromatic cold neutrons of different wavelengths provides a unique contrast due to coherent Bragg scattering. Additionally, the spectral positions of the Bragg edges can be mapped for each point of an image by using the transmission data of corresponding wavelength scans. We present investigations of welded components with such energy-selective neutron radiography around specific Bragg-edges in the transmission spectrum. Features in the local microstructure of the weld have been visualized.


* Correspondence address Dr. Nikolay Kardjilov, Helmholtz-Zentrum Berlin, Hahn-Meitner Platz 1, 14109 Berlin, Germany, Tel.: +49 30 80 62 42 298, Fax: +49 30 80 62 43 059, E-mail:

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Received: 2011-8-17
Accepted: 2011-11-4
Published Online: 2013-05-31
Published in Print: 2012-02-01

© 2012, Carl Hanser Verlag, München

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