Study on the evolution of dislocation loops and radiation hardening effect in FeCrAl ODS steel
In order to study the radiation resistance of FeCrAl ODS steel,the evolution of dislocation loops in Fe-CrAl ODS steel under irradiation was studied using in-situ ion irradiation method,and the irradiation hardening effect of FeCrAl ODS steel was characterized using nanohardness.The research results indicate that after ion irra-diation,FeCrAl ODS steel produces＜100＞and 1/2＜111＞dislocation loops,and the average diameter and density of dislocation loops increase with the increase of irradiation damage dose.As the irradiation temperature increas-es,the growth rate of dislocation loops increases while the number density decreases.After 10 dpa ion irradia-tion,the irradiation hardening value of FeCrAl ODS steel is only 0.35 GPa,indicating good resistance to irradia-tion hardening.
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