کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5453839 | 1514151 | 2017 | 23 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Tensile properties and microstructure of Zr-1.8Nb alloy subjected to 140-MeV C4+ ion irradiation
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی انرژی
انرژی هسته ای و مهندسی
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چکیده انگلیسی
Tensile properties and microstructure of a Zr-1.8Nb alloy subjected to 140-MeV C4+ ion irradiation at 573Â K up to 5.3 dpa have been investigated by using 0.18Â mm-thick tensile specimens. Irradiation damage was introduced into the tensile specimens homogeneously over entire thickness using a variable energy degrader. Irradiation-induced strengthening and embrittlement (loss of ductility) were successfully evaluated. The yield strength of irradiated specimens (3.1- and 5.3-dpa) was 137% and 145% of unirradiated specimen, whereas the total elongation of those irradiated specimens was less than a half of unirradiated specimen. It appears that the rate of embrittlement is fairly faster than the rate of strengthening. Transmission electron microscopy (TEM) observation on the 3.1-dpa specimen revealed that the bcc-Nb/Zr precipitates originally contained in the alloy were stable in terms of crystal structure and size. The size and number density of dislocation loops were 7.2Â nm and 1.2Â ÃÂ 1021/m3 for the -loops, 15.4Â nm and 6.5Â ÃÂ 1020/m3 for the -type loops, respectively. The increase of yield strength expected from these dislocation loops was â¼64% of the actual irradiation-induced strengthening, indicating that the dislocation loops are the main contributors for the irradiation-induced strengthening.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Nuclear Materials - Volume 495, November 2017, Pages 138-145
Journal: Journal of Nuclear Materials - Volume 495, November 2017, Pages 138-145
نویسندگان
H.L. Yang, S. Kano, Y. Matsukawa, J.J. Shen, Z.S. Zhao, Z.G. Duan, D.Y. Chen, K. Murakami, Y.F. Li, Y. Satoh, H. Abe,