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Abstract X-ray diffraction of fracture surfaces of Zr-2.5Nb after delayed hydride cracking revealed both γ-phase and δ-phase after testing isothermally at temperatures between 25°C and 240°C. The fraction of hydrides… Click to show full abstract
Abstract X-ray diffraction of fracture surfaces of Zr-2.5Nb after delayed hydride cracking revealed both γ-phase and δ-phase after testing isothermally at temperatures between 25°C and 240°C. The fraction of hydrides that are γ-phase on the fracture surfaces depends on temperature with high values of γ-phase at low test temperatures. When similar amounts of each hydride phase are observed on the same fracture surface, the γ-phase fraction should diminish to zero at the trailing end, that is, the oldest region, if γ-phase is transforming to δ-phase. The absence of such an extreme difference of the γ-phase fraction indicates that γ-phase is a stable phase.
Journal Title: Journal of Nuclear Materials
Year Published: 2021
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