Abstract
Mechanical property changes of several metals irradiated with fission neutrons from JMTR (Japanese materials test reactor) and fusion neutrons from RTNS-II (rotating target neutron source at LLNL) are compared in terms of the change in parameters such as yield strength, uniform elongation limit, strain hardening exponent and ultimate tensile strength. A DEPA (damage energy per atom) scale for neutron dose seems to be valid for comparing different irradiation condition. However, all the parameters obtained from both irradiation by JMTR and RTNS-II do not completely coincide with each other at the same time. This is due to the dose dependency of these parameters being different for both irradiation conditions. The correlation is not as simple as can be obtained simply by shifting plots for doses, and the correlation factor many depend on a neutron dose and a materials constant.
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