Temperature-dependent helium induced microstructural evolution in equiatomic NiCo and NiFe concentrated solid solution alloys

Shaofei Liu, Da Chen, Shijun Zhao, Weitong Lin, Fanling Meng, Yilu Zhao, Guma Yeli, Feng He, Yiran Li, Huan Niu, Ji jung Kai

科研成果: 期刊稿件文章同行评审

4 引用 (Scopus)

摘要

Irradiation temperature and the species of elemental constituents are two pivotal factors in determining the helium (He) radiation behaviors. However, their synergistic effect on the He-induced defect evolution in single-phase concentrated solid-solution alloys (SP-CSSAs) has rarely been studied. In this work, the evolution of He cavities and dislocation structural damages in two equiatomic SP-CSSAs, i.e., NiCo and NiFe, were investigated at 673 K, 773 K and 873 K with 275 keV He+ ions. He cavity formation behaviors were diverse at different temperature regimes. NiFe was found to have a stronger suppression effect on He cavity growth at 673 K. However, with the increasing temperature, a more pronounced increment of He cavity size was exhibited in NiFe. Unlike the evolution of He cavities, the growth of dislocation loops tends to be delayed in NiFe over the studied irradiation temperatures. The underlying mechanisms for the temperature-dependent defect evolution in NiCo and NiFe are discussed.

源语言英语
文章编号152715
期刊Journal of Nuclear Materials
545
DOI
出版状态已出版 - 3月 2021
已对外发布

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