کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5467592 | 1398939 | 2017 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Helium-induced hardening effect in polycrystalline tungsten
ترجمه فارسی عنوان
اثر سخت کننده ناشی از هلیم در تنگستن پلی کریستالی
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کلمات کلیدی
اثر سخت کننده، حباب هلیوم، تنگستن پلی کریستالی،
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سطوح، پوششها و فیلمها
چکیده انگلیسی
In this paper, helium induced hardening effect of tungsten was investigated. 50Â keV He2+ ions at fluences vary from 5Â ÃÂ 1015Â cmâ2 to 5Â ÃÂ 1017Â cmâ2 were implanted into polycrystalline tungsten at RT to create helium bubble-rich layers near the surface. The microstructure and mechanical properties of the irradiated specimens were studied by TEM and nano-indentor. Helium bubble rich layers are formed in near surface region, and the layers become thicker with the rise of fluences. Helium bubbles in the area of helium concentration peak are found to grow up, while the bubble density is almost unchanged. Obvious hardening effect is induced by helium implantation in tungsten. Micro hardness increases rapidly with the fluence firstly, and more slowly when the fluence is above 5Â ÃÂ 1016Â cmâ2. The hardening effect of tungsten can be attributed to helium bubbles, which is found to be in agreement with the Bacon-Orowan stress formula. The growing diameter is the major factor rather than helium bubbles density (voids distance) in the process of helium implantation at fluences below 5Â ÃÂ 1017Â cmâ2.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms - Volume 406, Part B, 1 September 2017, Pages 643-647
Journal: Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms - Volume 406, Part B, 1 September 2017, Pages 643-647
نویسندگان
Fanhang Kong, Miao Qu, Sha Yan, Ailin Zhang, Shixiang Peng, Jianming Xue, Yugang Wang,