Prediction of creep ductility for austenitic stainless steels and copper

For modern creep-resistant steels, ductility is primarily controlled by cavitation, since brittle rupture dominating during long-term service. In recent years, the present authors have formulated fundamental models for nucleation and growth of cavities that been verified to be able describe experiments austenitic stainless steels. These equations, together with dislocation creep, are used in this paper basic modelling results creep steels first time. New also presented ductile rupture, where elongation values mainly governed plastic instability necking. The Hart criterion identify strain forms. Modelling shows grows very slowly its size not significant until close rupture. facts demonstrate can predicted from necking behaviour.