Radiation Annealing Mechanisms of Low-Alloy Reactor Pressure Vessel Steels Dependent on Irradiation Temperature and Neutron Fluence

Hardness and electrical resistivity of molybdenum in the post-irradiated and annealed conditions

“…Isothermal annealing of 270°C and 605°C irradiated LCAC was performed at 700°C to determine the activation energy for recovery using the Meechan-Brinkman method of analysis [47][48][49]. The fraction of recovery, f, during isochronal annealing in Figs.…”

The change in the hardness of LCAC, TZM, and ODS molybdenum in the post-irradiated and annealed conditions

“…Isothermal annealing of LCAC, ODS, and TZM irradiated at nominally 300°C and 600°C was performed at 700°C to determine the kinetics for recovery using the Meechan-Brinkman method of analysis [45][46][47]. The same approach was used previously for LCAC irradiated to lower dose [25].…”

“…These studies have mainly used electrical resistivity methods while the studies that have utilized hardness measurements are generally conducted at a single irradiation temperature and single neutron fluence. Only recently was the Meechan-Brinkman analysis of isochronal and isothermal annealing results [45][46][47] used to determine the activation energy for post-irradiation recovery for unalloyed Low Carbon Arc Cast (LCAC) molybdenum. It was shown to be comparable to values for molybdenum vacancy self-diffusion for irradiations at 270°C and 605°C to fluences between 10.5 and 27.0 Â 10 24 n/m 2 [25].…”

A radiation hardening model of 9%Cr–martensitic steels including dpa and helium

“…To define the kinetics of the temperature dependence of the radiation damage (dpa-component), the annealing (recovery) kinetics is used [12]. Assuming that the recovery mechanism is mainly driven by the escape of vacancies from the zones, an Arrhenius law type of kinetic can be expected [13,14].…”