Helium ion irradiation damage behavior in a reduced activation steel

doi:10.13251/j.issn.0254-6051.2022.07.036

Abstract

Abstract: Irradiation damage behavior of a reduced activation steel was studied by carrying out helium ion irradiation at different temperatures, and the irradiation-induced defect microstructure and hardening effect were observed and analyzed by means of transmission electron microscope (TEM) and nanoindenter respectively. The results show that the defect microstructure induced by irradiation mainly includes bubbles and coarsening of M₂₃C₆ precipitate. Bubbles aggregate on grain boundaries, the bubble density increases with the increase of irradiation intensity, and the bubble size increases while the density decreases with the increase of irradiation temperature. The hardness of the reduced activation steel increases after irradiation, while the temperature rising weakens this effect. Irradiation hardening is related to size and density of defect microstructure, and the high density of small bubbles contributes mainly to hardening. As the irradiation temperature rises, the bubble density decreases sharply, which weakens irradiation hardening.

Key words: reduced activation steel, helium ion irradiation, defect microstructure, irradiation hardening

CLC Number:

TG142

Xia Lidong, Huo Xiaojie, Zhang Chi, Gao Dali, Wu Changjiang, Zhang Shijun. Helium ion irradiation damage behavior in a reduced activation steel[J]. Heat Treatment of Metals, 2022, 47(7): 211-215.

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