کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1447556 | 988648 | 2011 | 11 صفحه PDF | دانلود رایگان |

This paper presents a detailed phase and texture study within and around a hydride blister grown on the surface of a Zr–2.5%Nb pressure tube. The analysis is based on synchrotron X-ray diffraction experiments using an 80 keV photon beam and a high-speed area detector placed in transmission geometry. It was found that the blister is composed of two main phases, α-Zr and δ-ZrH, with a composition which changes locally across the blister. No location within the blister presents pure δ zirconium hydride, with a maximum of 80% for the volume fraction of δ hydride at the center of the blister. The texture observed for both phases in the original pressure tube remains essentially unaltered across the hydride blister. A detailed analysis of this texture using well-known parent–precipitate relationships shows that some selective precipitation occurs at α-Zr grains with their c-axis under a tensile stress, and on grains with grain boundaries favorably aligned for hydride nucleation.
Journal: Acta Materialia - Volume 59, Issue 5, March 2011, Pages 2210–2220