Fluence dependence of helium ion irradiation effects on the microstructure and mechanical properties of tungsten
收藏科学数据银行2022-10-19 更新2026-04-23 收录
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资源简介：
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.
提供机构：
Institute of Plasma Physics; Hefei Institutes of Physical Science
创建时间：
2022-10-15
