Atom probe tomography characterization of ion and neutron irradiated Alloy 800H

JOURNAL OF NUCLEAR MATERIALS

卷:543

Article

Liu, Tian¹  Reese, ElainaR.¹  Ghamarian, Iman¹  Marquis, Emmanuelle A.¹ 

[1] Univ Michigan, Dept Mat Sci & Engn, Ann Arbor, MI 48109 USA

关键词: 800H;    Ion irradiation;    Neutron irradiation;    APT;   

DOI  :  10.1016/j.jnucmat.2020.152598

来源: Elsevier

【 摘 要 】

Alloy 800H is a high temperature and creep resistant alloy, and is considered as a candidate alloy for use in Generation IV nuclear reactor systems. To clarify the alloy's behavior under irradiation, samples were subjected to single ion irradiations up to 20 dpa at 440 degrees C, a dual ion/He irradiation to 17 dpa at 460 degrees C, and a neutron irradiation to 17 dpa at 385 degrees C. The irradiated microstructures were characterized using atom probe tomography to complement previously published transmission electron microscopy studies. After single ion irradiation, sparse fine Al and Ti clusters were observed after 1dpa, while high number densities of nanoscale Ni-Al-Ti clusters, Cr-Ti rich carbides, and Si-decorated dislocation loops developed after 10 and 20 dpa. The microstructure formed during single ion irradiation exhibited a strong depth dependence. No significant differences were observed between the single and dual ion irradiations. While Ni-Al-Ti clusters, Cr-Ti rich carbides, and Si-decorated dislocation loops were also observed after neutron irradiation, the neutron-irradiated microstructure differed from those found in the ion-irradiated samples. (C) 2020 Published by Elsevier B.V.

【 授权许可】

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