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| Study on the evolution of dislocation loops and radiation hardening effect in FeCrAl ODS steel |
| LONG Dijun1，XU Haibo2，SUN Yongduo2，Lü Junnan2 |
| （1.China National Nuclear Corporation, Beijing 100822, China ；2.Nuclear Power Institute of China, Chengdu
610041, China；） |
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Abstract 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 irradiation,
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 increases,
the growth rate of dislocation loops increases while the number density decreases. After 10 dpa ion irradiation,
the irradiation hardening value of FeCrAl ODS steel is only 0.35 GPa, indicating good resistance to irradiation
hardening.
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Received: 23 January 2024
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2024, Vol. 34 
