کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1447556 988648 2011 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Phase and texture analysis of a hydride blister in a Zr–2.5%Nb tube by synchrotron X-ray diffraction
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Phase and texture analysis of a hydride blister in a Zr–2.5%Nb tube by synchrotron X-ray diffraction
چکیده انگلیسی

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.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Acta Materialia - Volume 59, Issue 5, March 2011, Pages 2210–2220
نویسندگان
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