کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7963887 | 1514167 | 2016 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Microstructure evolution during helium irradiation and post-irradiation annealing in a nanostructured reduced activation steel
ترجمه فارسی عنوان
تکامل میکروارگانیسم در اثر تابش هلیم و انحلال پس از تابش در یک فولاد فعال سازی کاهش یافته با نانوساختار
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کلمات کلیدی
نانوکریستال، اشعه یون حباب هلیوم، پس از تابش خورشیدی، کاهش فعال شدن فولاد،
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی انرژی
انرژی هسته ای و مهندسی
چکیده انگلیسی
Severe plastic deformation, intense single-beam He-ion irradiation and post-irradiation annealing were performed on a nanostructured reduced activation ferritic/martensitic (RAFM) steel to investigate the effect of grain boundaries (GBs) on its microstructure evolution during these processes. A surface layer with a depth-dependent nanocrystalline (NC) microstructure was prepared in the RAFM steel using surface mechanical attrition treatment (SMAT). Microstructure evolution after helium (He) irradiation (24.8Â dpa) at room temperature and after post-irradiation annealing was investigated using Transmission Electron Microscopy (TEM). Experimental observation shows that GBs play an important role during both the irradiation and the post-irradiation annealing process. He bubbles are preferentially trapped at GBs/interfaces during irradiation and cavities with large sizes are also preferentially trapped at GBs/interfaces during post-irradiation annealing, but void denuded zones (VDZs) near GBs could not be unambiguously observed. Compared with cavities at GBs and within larger grains, cavities with smaller size and higher density are found in smaller grains. The average size of cavities increases rapidly with the increase of time during post-irradiation annealing at 823Â K. Cavities with a large size are observed just after annealing for 5Â min, although many of the cavities with small sizes also exist after annealing for 240Â min. The potential mechanism of cavity growth behavior during post-irradiation annealing is also discussed.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Nuclear Materials - Volume 479, October 2016, Pages 323-330
Journal: Journal of Nuclear Materials - Volume 479, October 2016, Pages 323-330
نویسندگان
W.B. Liu, Y.Z. Ji, P.K. Tan, C. Zhang, C.H. He, Z.G. Yang,