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Persistent URL http://purl.org/net/epubs/work/34003
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Record Id 34003
Title Crystal orientation, mosaicity and strain in mosaic crystals studied by time-of-flight neutron transmission
Abstract We introduce the basic features of the neutron transmission by mosaic crystals through demonstration experiments comprising in-situ loading tests on plastically deformed Cu crystals, originally used as neutron monochromators. We show that these experiments can be used to monitor the variation in orientation, mosaic spread and interplanar distances, that occur as a result of elastic or plastic deformation. Distinctive features of this technique are the ability to study many crystal reflections simultaneously, together with the possibility of 2D spatial resolution. In its present state, it is possible to study the spatial distribution of a specimen?s deformation in-situ over an area of 25x25 mm2 with 2 mm spatial resolution. We report the anisotropic evolution of the mosaic spread of a crystal as a result of plastic deformation, and its dependence on the macroscopic shear strain and applied stress.
Organisation CCLRC , ISIS , ISIS-ENGIN-X
Keywords Materials , mosaic crystals, neutron transmission, monochromators , ISIS 2005
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Language English (EN)
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Paper In Conference Proceedings In 25th Riso Int. Symp. on Materials Science (RISO 25), Roskilde, Denmark, 6-10 Sep 2004, (2004). santisteban_riso.pdf 2004