کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7963093 | 1514139 | 2018 | 17 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effects of neutron irradiation and post-irradiation annealing on the microstructure of HT-UPS stainless steel
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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
Microstructural changes resulted from neutron irradiation and post-irradiation annealing in a high-temperature ultra-fine precipitate strengthened (HT-UPS) stainless steel were characterized using transmission electron microscopy (TEM) and atom probe tomography (APT). Three HT-UPS samples were neutron-irradiated to 3 dpa at 500â¯Â°C, and after irradiation, two of them were annealed for 1â¯hâ¯at 600â¯Â°C and 700â¯Â°C, respectively. Frank dislocation loops were the dominant defect structure in both the as-irradiated and 600â¯Â°C post-irradiation-annealed (PIAed) samples, and the loop sizes and densities were similar in these two samples. Unfaulted dislocation loops were observed in the 700â¯Â°C PIAed sample, and the loop density was greatly reduced in comparison with that in the as-irradiated sample. Nano-sized MX precipitates were observed under TEM in the 700â¯Â°C PIAed sample, but not in the 600â¯Â°C PIAed or the as-irradiated samples. The titanium-rich clusters were identified in all three samples using APT. The post-irradiation annealing (PIA) caused the growth of the Ti-rich clusters with a stronger effect at 700â¯Â°C than at 600â¯Â°C. The irradiation caused elemental segregations at the grain boundary and the grain interior, and the grain boundary segregation behavior is consistent with observations in other irradiated austenitic steels. APT results showed that PIA reduced the magnitude of irradiation induced segregations.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Nuclear Materials - Volume 507, 15 August 2018, Pages 188-197
Journal: Journal of Nuclear Materials - Volume 507, 15 August 2018, Pages 188-197
نویسندگان
Chi Xu, Wei-Ying Chen, Xuan Zhang, Yaqiao Wu, Meimei Li, Yong Yang,