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• W239471198 abstract "The alloying element content present in the α-Zr matrix of Zr alloys, especially the concentration and distribution of the transition elements Fe, Cr, Ni is crucial to determining the alloy corrosion behavior. However, the levels of these elements in the Zr matrix are so low that they cannot be measured by traditional techniques. Using the unique combination of spatial and elemental resolution achieved in the microbeam line at the Advanced Photon Source at Argonne (APS), we can study the alloying element concentration in the hexagonal matrix of α-Zr with a precision hitherto not achieved. In this research program we use x-ray fluorescence from a sub-micron x-ray beam to study these alloying element concentration in the matrix as a function of alloy type, thermomechanical treatment and irradiation conditions. The information thus obtained will allow more precise and mechanistic predictions of alloy behavior, especially in conditions of high fuel burnup. In this preliminary study, we report on the initial determinations of matrix alloying element concentrations for standard non-irradiated alloys, both in the quenched and annealed states. The results from 2D-fluorescence scans clearly show that we can spatially distinguish the precipitates from the matrix using the fluorescence signal. We found that significantly sharper ratios of concentrations can be obtained from thin foil samples than from dimpled or bulk samples, indicating that the influence of buried layers is significant. We examined the difference between alloying contents of quenched samples of the different alloys, using TEM samples. The values we obtained were in good agreement with the nominal values for Zircaloy-4 and with the measured values for ZIRLO. We also briefly examined the alloying content in the matrix of asfabricated Zircaloy-4 and found it to be higher than estimated" @default.
• W239471198 created "2016-06-24" @default.
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• W239471198 date "2000-03-02" @default.
• W239471198 modified "2023-09-22" @default.
• W239471198 title "STUDY OF ALLOYING ELEMENTS IN THE ZR MATRIX OF ZIRCALOY-4 AND ZIRLO USING THE ADVANCED PHOTON SOURCE AT ARGONNE." @default.
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