Abstract:Zircaloy-2 becomes susceptible to nodular corrosion in high-temperature, high-pressuresteam when the total solute concentration of the~-stabilizing alloying elements Fe, Ni and Cr in the a-zirconium matrix falls below a critical value CCthat is characteristic of the test conditions. CCfor typical commercial Zircaloy-2 in a 24hr / 5 10"C / 10.4MPa steam-test is the precipitate-free a-matrix concentration in equilibrium with solutesaturated f) phase at about 840"C, the corresponding critical temperature TC.Thus,… Show more
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