کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8039496 | 1518609 | 2018 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Fluence dependence of helium ion irradiation effects on the microstructure and mechanical properties of tungsten
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سطوح، پوششها و فیلمها
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چکیده انگلیسی
To understand the effect of helium ion irradiation on the microstructure and mechanical properties of tungsten (W), recrystallized W is irradiated by 80Â keV helium ions with fluence of 3Â ÃÂ 1015, 3Â ÃÂ 1016 and 3Â ÃÂ 1017Â ions/cm2. Transmission electron microscope (TEM) observation suggests that large numbers of dislocation loops are generated in W and 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 <1Â 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.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms - Volume 414, 1 January 2018, Pages 121-125
Journal: Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms - Volume 414, 1 January 2018, Pages 121-125
نویسندگان
Mingzhong Zhao, Feng Liu, Zhongshi Yang, Qian Xu, Fang Ding, Xiaochun Li, Haishan Zhou, Guang-Nan Luo,