Self-diffusion and solute diffusion in alloys under irradiation: Influence of ballistic jumps

Temporal evolution of the nanostructure and phase compositions in a model Ni–Al–Cr alloy

“…In an article published shortly after such models were first introduced, Chellman and Ardell [41] evaluated the available coarsening data at 1023 K along a c plus c 0 tie-line for four nearly misfit-free c 0 -strengthened Ni-Al-Cr alloys [10,41,47] with increasing / (0.23 to 0.42), and they found that within experimental error K does not vary with /. They concluded that the / independence of K is associated with the approximations used to solve the diffusion problems in these models, but they did not consider that diffusional processes may not be strictly governed by diffusion in the matrix [48]. For our alloy, using calculated intrinsic diffusivities in the cphase of 2.…”

Accelerated Diffusion and Phase Transformations in Co–Cu Alloys Driven by the Severe Plastic Deformation

“…In case of irradiation, the material is not far from equilibrium, the forced atomic movements are similar to those during conventional entropy-driven diffusion, and the system can easily be described by an equilibrium phase diagram, however, not at the treatment temperature, but at a certain effective temperature T eff . 62,63) In case of SPD, it is already not so obvious that the deformation-driven atomic movements are similar to the atomic diffusion jumps. It means that the applicability of a central Martin's equation (1) becomes questionable.…”

Calculation of radiation damage induced by neutrons in compound materials

“…The dpa production rate is roughly equal to 10 À8 dpa/s for HTR and 10 À6 dpa/s for 800 keV Bi and 150 keV Ne irradiations with a typical flux / equal to 10 10 cm À2 s À1 . Therefore, depending on the material behaviour at the mesoscopic scale [36], these two dpa production rates may generate the same microstructural evolution of solid. Fig.…”