Coalescence of pore assembly forming under irradiation on precipitate surfaces

Consideration is given to influence of precipitates on change of pore size distribution function and to radiation swelling behaviour of nanodispersed-precipitate-strengthened ferrite-martensitic steels at high radiation doses. Decay of supersaturated solution of irradiation point defects results in formation and growth of volume defects such as vacancy pores. In homogeneous material pore surface determines the point defect flows directed to it. But in materials with new phase precipitates surface of such precipitates is a good drain for point defects which can form precipitate-related pores. It is shown that existence of precipitates change essentially coalescence kinetics of pore assembly under irradiation that leads to other dose dependence of material swelling