Recent experimental data on the post-quenchductility of zirconium alloys provides insights intothe role of the prior-beta layer oxygen and hydrogencontent. Additional data is needed to further quantifythe effects of hydrogen on the ductile/brittle behaviorof post-quenched zirconium-alloy cladding material.These data include measurements of the oxygen andhydrogen distribution within the prior-beta layer,microhardness measurements of the prior-beta layer,and further oxidation tests to quantify the impact ofcooling rate and oxidation temperature on postquenchductility.
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