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The cold‐rolling and β‐recrystallization textures of zircaloy 2
Author(s) -
Dickson M. J.
Publication year - 1970
Publication title -
journal of applied crystallography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.429
H-Index - 162
ISSN - 1600-5767
DOI - 10.1107/s0021889870006829
Subject(s) - recrystallization (geology) , annealing (glass) , materials science , slip (aerodynamics) , crystal twinning , overline , crystallography , metallurgy , physics , chemistry , microstructure , thermodynamics , geology , particle physics , paleontology
A study has been made of the cold‐rolling and β‐recrystallization textures of Zircaloy‐2. From a hot‐rolling texture consisting mainly of a distribution between { 24}, {103} and (0001) components, with a minor {3 1} component, a strong (0001) rolling texture is gradually developed. Between 71.5% and 78% reduction, the intensity of (0001) increases quite markedly, and between 86.5% and 90% reduction there is a slight decrease. Development of the rolling texture is accompanied by a gradual change in the corresponding β‐annealing texture, i.e. the initial sheet recrystallizes to a very strong {31} texture; after 39.5% reduction other components appear in the annealing texture between (0001) and {103}, and the intensity of {31} decreases. With increasing reduction this transition continues, until, after 90% the β‐recrystallization texture may be described as (0001) + {103} + {101}, with a scatter between these orientations and between {101} and {100}. The initial development of the rolling texture is attributed to interaction of slip on {100}, {101} and (0001) planes with twinning taking place on {102}, {111} and {112}. The rapid rotation towards (0001) between 71.5% and 78% reduction is considered to be due to extensive cross‐slip between {101} planes, while the later movement of peak intensity away from (0001) is attributed to re‐activation of latent slip systems. The β‐recrystallization textures are consistent with an orientation‐selective growth mechanism in the β phase, corresponding to a rotation of approximately 45° about a 〈111〉 axis.