SEDL / STP / STP551-EB / STP32116S

Directionality of the Grain Boundary Hydride in Zircaloy-2

Kawanishi, H
Research assistant, associate professor, and professor, University of Tokyo, Tokyo,

Ishino, S
Research assistant, associate professor, and professor, University of Tokyo, Tokyo,

Mishima, Y
Research assistant, associate professor, and professor, University of Tokyo, Tokyo,

Pages: 11    Published: Jan 1974

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Abstract

The correlation between hydride orientation and texture has been studjed. Previous_work showed that there are grain boundary “habits” such as {101¯1}, {101¯3}, and {101¯5} for hydride precipitation in Zircaloy-2. By taking into account the stereographic configuration of these habits, the fn-values of various specimens have been evaluated. Comparison between fn-values obtained metallographically and by the present method gives excellent agreement.

The mechanism of stress reorientation of hydride and the dependence of stress reorientation on stress direction are also discussed.