کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8943230 | 1645141 | 2018 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
High-temperature damage evolution in 10â¯keV He+ irradiated W and W-5Re
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
دانش مواد (عمومی)
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چکیده انگلیسی
High-temperature damage evolution in pure W and W-5Re has been studied by combining transmission electron microscopy and in-situ irradiations with 10â¯keV He+ ions. The irradiations covered a temperature range of Tirrâ¯=â¯773-1473â¯K and a fluence range of (4.5-15)â¯Ãâ¯1019â¯He+/m2. In pure W, detailed characterizations have shown that damage evolution is highly dependent upon the foil thickness. Regions of thicknessâ¯<â¯100â¯nm featured helium bubbles almost exclusively. With increasing Tirr from 773â¯K to 1473â¯K, a pronounced bubble growth and an increased degree of bubble ordering were observed. In thicker regions (â³100â¯nm), 1/2ã111ã dislocation loops and line entanglements were found up to 1473â¯K, and were often seen to be decorated with helium bubbles. In W-5Re, areas of different foil thickness exhibited only small differences in damage evolution. The densities of bubbles were comparable to those seen in pure W at all temperatures, while the average size of bubbles was found to be ~10-40% higher. The damage microstructure transformed from a mixture of dislocation loops and bubbles at 773â¯K to dislocation line entanglements decorated with bubbles at 1473â¯K.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Characterization - Volume 145, November 2018, Pages 77-86
Journal: Materials Characterization - Volume 145, November 2018, Pages 77-86
نویسندگان
Xiaoou Yi, Kazuto Arakawa, Francesco Ferroni, Michael L. Jenkins, Wentuo Han, Pingping Liu, Farong Wan,