Stress relieved Zircaloy-4 recovery and recrystallization during fast anisothermal transients
Résumé
Cold-work stress-relieved Zircaloy-4 kinetics of recovery-recrystallization has been studied under dynamic conditions. A specific furnace dilatometer was used to heat Zircaloy-4 specimens up to 430 °C∙s〗^(-1). Comparison of dynamic results with data of isothermal recovery and recrystallization showed that the process is delayed when the heating rate is increased. A model was proposed to describe the evolution of the material unrecrystallized fraction during rapid anisothermal transients. Comparisons showed a good agreement between the experimental results and the model predictions.
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