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Inhomogeneous Distribution of Dislocation Density as Manifestation of Multiscale Structure in Tubes from Zr - Based Alloys

Published online by Cambridge University Press:  15 February 2011

Yuriy Perlovich  and
Margarita Isaenkova
Yuriy Perlovich
Affiliation:
Moscow Engineering Physics Institute, Kashirskoe shosse 31, Moscow 115409, Russia
Margarita Isaenkova
Affiliation:
Moscow Engineering Physics Institute, Kashirskoe shosse 31, Moscow 115409, Russia
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Abstract

An X-ray method was developed to determine the dislocation density in metal materials as a distribution depending on the orientation of Burgers vector. The method includes registration of X-ray line profiles by each successive position of the sample in the course of diffractometric texture measurement using reflections of two orders, the following determination of coherent domain size and lattice distortion by means of the Warren-Averbach method for each orientation of reflecting planes, separate calculation of the density of c- and a-dislocations with all possible orientations of Burgers vector and presentation of results in the generalized pole figures. The method was used to determine the dislocation density in tubes of Zr-based alloys for nuclear industry. Obtained data show, that the dislocation density varies within very wide interval of several orders of magnitude depending on the grain orientation both in as-rolled and annealed tubes. Features of the dislocation distribution in tubes are closely related to their crystallographic texture.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 779: Symposium W – Multiscale Phenomena in Materials - Experiments and Modeling Related to Mechanical Behavior , 2003 , W5.26
Copyright
Copyright © Materials Research Society 2003

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