1. Neutron irradiation effects in Fe and Fe-Cr at 300 °C.
- Author
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Chen, Wei-Ying, Miao, Yinbin, Gan, Jian, Okuniewski, Maria A., Maloy, Stuart A., and Stubbins, James F.
- Subjects
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NEUTRON irradiation , *IRON compounds , *COMPLEX compounds , *TRANSMISSION electron microscopy , *DISLOCATION loops , *MICROSTRUCTURE - Abstract
Fe and Fe-Cr (Cr = 10–16 at.%) specimens were neutron-irradiated at 300 °C to 0.01, 0.1 and 1 dpa. The TEM observations indicated that the Cr significantly reduced the mobility of dislocation loops and suppressed vacancy clustering, leading to distinct damage microstructures between Fe and Fe-Cr. Irradiation-induced dislocation loops in Fe were heterogeneously observed in the vicinity of grown-in dislocations, whereas the loop distribution observed in Fe-Cr is much more uniform. Voids were observed in the irradiated Fe samples, but not in irradiated Fe-Cr samples. Increasing Cr content in Fe-Cr results in a higher density, and a smaller size of irradiation-induced dislocation loops. Orowan mechanism was used to correlate the observed microstructure and hardening, which showed that the hardening in Fe-Cr can be attributed to the formation of dislocation loops and α′ precipitates. [ABSTRACT FROM AUTHOR]
- Published
- 2016
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