2026-10-13T09:57:57Z https://www.scidb.cn/oai

10.57760/sciencedb.03808 2022-10-19T16:56:13Z

2022-10-19 Fluence dependence of helium ion irradiation effects on the microstructure and mechanical properties of tungsten doi:10.57760/sciencedb.03808 en To understand the effect of helium ion irradiation on the microstructure and mechanical properties of tungsten (W), recrystallized W is irradiated by 80 keV helium ions with fluence of 3×1015, 3×1016 and 3×1017 ions/cm2. Transmission electron microscope (TEM) observation suggests that large numbers of dislocation loops are generated in Wand the size of the dislocation loop increases with irradiation fluence. The results of micro-hardness and nanoindentation show that the irradiation hardening can be clearly detected after helium ion bombardment with displacements per atom (dpa) of <1 dpa. However, this hardening effect becomes milder when the irradiation fluence is further increased. Finally, the irradiation hardening behavior of W is analyzed by the dispersed barrier model and the calculated results follow the same trend with that of nanoindentation. Tungsten; Helium ion irradiation; Microstructure; Irradiation hardening Zhao Mingzhong Liu Feng Yang Zhongshi Xu Qian Ding Fang Li Xiaochun Zhou Haishan Luo Guangnan PUBLIC https://creativecommons.org/licenses/by/4.0/ dataset http://www.doi.org/10.1016/j.nimb.2017.09.002 Science Data Bank