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Cr precipitation in neutron irradiated industrial purity Fe–Cr model alloys

Abstract : The microstructure of four neutron irradiated Fe-Cr model alloys of industrial purity (Fe-2.5%Cr, Fe-5%Cr, Fe-9%Cr and Fe-12%Cr) has been characterized by atom probe tomography (APT). Irradiation has been performed at 300 degrees C up to 0.6 dpa in MTR reactor. APT investigations confirmed the enhanced precipitation of alpha' clusters as these clusters have only been observed in supersaturated model alloys. In addition a nonexpected family of clusters has been revealed due to irradiation induced segregation of impurities: NiSiPCr-enriched clusters. They might be associated to defect clusters invisible by transmission electron microscopy (TEM). A quantitative description of these objects is presented in this paper and results are compared with TEM and SANS data of the literature obtained on the same model alloy.
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Submitted on : Tuesday, April 23, 2019 - 4:04:02 PM
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V. Kuksenko, Cristelle Pareige, Philippe Pareige. Cr precipitation in neutron irradiated industrial purity Fe–Cr model alloys. Journal of Nuclear Materials, 2013, 432 (1-3), pp.160-165. ⟨10.1016/j.jnucmat.2012.07.021⟩. ⟨hal-02107314⟩



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