Cluster dynamics simulation of point defect clusters in neutron irradiated pure iron

Cluster dynamics modeling of accumulation and diffusion of helium in neutron irradiated tungsten

“…The rate coefficients listed in Table 1 describe the physical production rates and the rates of capture and emission of point defects by defect clusters [19,21,23]. These processes include the production and recombination of I-V point defects and the reactions of I n À I=I 2 =V; V n À hj h¼I;I 2 ;V;He ; He n À h; He m V n À hj h¼I;I 2 ;V ;He and He n I À hj h=V,He .…”

“…The evolution of mobile defects is described in a set of one-dimensional spatial diffusion-reaction equations by taking into account their diffusion and possible reactions with other defects, while immobile clusters clearly follow a Markovian chain process. Their evolution processes are described by the master equations [14,[18][19][20][21][22][23],…”

Cluster dynamics study of damage accumulation in helium-implanted Fe–2.5at%Cr alloy

“…VC, CV n (n < 7) and SIA clusters (SIAC) are treated as spherical objects and planar dislocation loops. Absorption of single point defects by clusters, dislocation net and grain boundaries are governed by size-dependent bias (15)(16)(17). Thermal emission of vacancies from VC, CV n (n < 7) and SIA s from SIAC is determined by size-dependent binding energy according to the detailed balance principle.…”

“…The primary damage of helium-implanted Fe-Cr alloys is produced in the form of Frenkel pairs, such that, only single vacancies and SIA s plus small VC and SIAC are generated by displacement cascades. The shape of distribution of the point defect clusters on size, produced per unit of time after cascade, is taken as in the case of neutron irradiation (15)(16)(17):…”

Rate theory modeling of dislocation loops in RAFM steel under helium ion irradiation and comparison with experiments

“…Understanding the issue of time development of dislocation loops in the presence of helium will help us to know better about the factors which influence the evolution of dislocation loops [11][12][13][14]. Related theoretical studies have reported some progresses in the effects of interstitial clusters in RAFM steels based on rate theory [15,16,[22][23][24]. Hardouin Duparc et al studied the nucleation and growth of point-defect clusters of ferritic model alloys under 1 MeV electron irradiation using the results from experiments and found that the existence of copper in iron is capable of stabilizing interstitial clusters [15].…”