Unlimited damage accumulation in metallic materials under cascade-damage conditions

Theoretical investigation of microstructure evolution and deformation of zirconium under neutron irradiation

“…Finally, we would like to emphasize that the predicted maximum value of the RG strain rate for Zr of $1% dpa À1 is the same as the maximum swelling rate found in cubic materials [17]. This follows from the similarity of cascade-induced radiation damage in the bcc, fcc and hcp metals, and indicates that the Production Bias Model [19], which was originally developed for cubic materials, provides a general framework for the theory of radiation damage.…”

“…3. The basic parameters of the model (Table 1), namely the fractions of defects recombining and clustering in cascades have been fitted to the experimental data available and found to be the same as those extracted from swelling experiments on fcc copper in [16], and those required to reproduce steady-state swelling rates observed in austenitic stainless steels at high irradiation doses [17]. 4.…”

“…Recently we have proposed a reaction-diffusion model of RG [14,15] which is based on the Production Bias Model (PBM) [16][17][18][19]. The PBM represents a significant step in the development of theory of void swelling in materials with cubic lattices.…”

Radiation Growth of HCP Metals under Cascade Damage Conditions

“…Such a situation is similar to what it was in the area of void swelling in the bcc-and fcc-type metallic materials ~20 years ago [9]. Since then the theory of void swelling has made significant progress towards a comprehensive model accounting for all observations and being consistent with modelling results (see the Production Bias Model (PBM) in its modern form [6,[9][10][11]).…”

Modeling Microstructure and Irradiation Effects

“…Mean field rate theory The MFRT models were used for more than 40 years in the field of radiation damage, [212][213][214][215][216][217][218][219]284,285] and all their accomplishments cannot be summarized in one paragraph. The MFRT was used to model irradiationinduced microstructures and, in particular, swelling of materials under irradiation (e.g., the production bias model [286,287] ). Let's just underline that the MFRT theory and coarse-grained (OKMC and EKMC) KMC methods ignore partially or totally the crystal lattice and rely on the same set of parameters: point defect diffusivity coefficients; binding energies of point defect with clusters and capture radii, which can be obtained from ab-initio calculations and MD simulations or specific experiments such as isochronal annealing following electron irradiation experiments as in Reference 288 or He desorption experiments.…”