کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7963465 1514147 2018 16 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Fatigue crack growth of 316NG austenitic stainless steel welds at 325 °C
موضوعات مرتبط
مهندسی و علوم پایه مهندسی انرژی انرژی هسته ای و مهندسی
پیش نمایش صفحه اول مقاله
Fatigue crack growth of 316NG austenitic stainless steel welds at 325 °C
چکیده انگلیسی
316NG austenitic stainless steel is a commonly-used material for primary coolant pipes of pressurized water reactor systems. These pipes are usually joined together by automated narrow gap welding process. In this study, welds were prepared by narrow gap welding on 316NG austenitic stainless steel pipes, and its microstructure of the welds was characterized. Then, fatigue crack growth tests were conducted at 325 °C. Precipitates enriched with Mn and Si were found in the fusion zone. The fatigue crack path was out of plane and secondary cracks initiated from the precipitate/matrix interface. A moderate acceleration of crack growth was also observed at 325°Cair and water (DO = ∼10 ppb) with f = 2 Hz.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Nuclear Materials - Volume 499, February 2018, Pages 353-360
نویسندگان
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