The dependence of irradiation creep in austenitic alloys on displacement rate and helium to dpa ratio

[摘要] Before the parametric dependencies of irradiation creep can be confidently determined, analysis of creep data requires that the various creep and non-creep strains be separated, as well as separating the transient, steady-state, and swelling-driven components of creep. When such separation is attained, it appears that the steady-state creep compliance, B-0, is not a function of displacement rate, as has been previously assumed. Tt also appears that the formation and growth of helium bubbles under high helium generation conditions can lead to a significant enhancement of the irradiation creep coefficient. This is a transient influence that disappears as void swelling begins to dominate the total strain, bur this transient can increase the apparent creep compliance by 100-200% at relatively low (less than or equal to 20) dpa levels. (C) 1998 Elsevier Science B.V. All rights reserved.

[发布日期] 1998-10-01

[效力级别]  Proceedings Paper