Creep behaviour of δ-phase of U–Zr system by impression creep technique

In this study, the impression creep behaviour of δ-phase of U–50 wt.% Zr (U–72.29 at.% Zr) system was studied in the temperature range 525–575 °C at different stresses. The velocity of the punch at different stresses and temperatures were evaluated for the above alloy. The stress exponents and thermal activation parameters of the above alloy were determined. A power law behaviour is displayed with the stress exponents range from 6.5 to 7. The activation enthalpy for the δ-UZr2 was found to be independent of stress with an average value of 106 kJ/mol.