Table of Contents
Textures and Microstructures
Volume 14–18
http://dx.doi.org/10.1155/TSM.14-18.989

Neutron Diffraction Measurement of Texture Variations Near a Weld in a Zr-2.5% Nb Plate

AECL Research, Chalk River Laboratories, Chalk River, Ontario K0J 1J0, Canada

Copyright © 1991 Hindawi Publishing Corporation. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

A welded Zr-2.5%Nb plate with a texture similar to that of a CANDU* nuclear reactor pressure tube has been studied to determine the texture variations in the fusion zone and the heat affected zone (HAZ). The texture of the HAZ is explained by preferential growth of (001)[110] grains in the high-temperature bcc phase, with subsequent variant selection on cooling to enhance the volume fraction of (0002) normals perpendicular to the line of the weld. The same texture is observed in the fusion zone along with a (001)[100] texture component arising from solidification. The textures of the fusion zone and HAZ are not expected to increase the susceptibility of the welded plate to delayed hydride cracking.