کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7973025 | 1514623 | 2018 | 15 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effect of thermal aging on mechanical properties of a bainitic forging steel for reactor pressure vessel
ترجمه فارسی عنوان
اثر پیرایش حرارتی بر خواص مکانیکی فولاد فایبر باینتیک برای مخزن راکتور فشار
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کلمات کلیدی
پیری گرما، ضعف مخزن مخزن راکتور فولاد آلیاژی پایین پراش نوترون،
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
دانش مواد (عمومی)
چکیده انگلیسی
Vickers hardness, Charpy impact and tensile properties of 16MND5 steel, a bainitic forging steel that is used for nuclear power reactor pressure vessel, were investigated before and after varied thermal aging durations at 350â¯Â°C up to 3000â¯h. After thermal aging for 500â¯h, the steel exhibits a remarkable increase in the ductile-to-brittle transition temperature (DBTT), a slight increase in the hardness, and slight degradations in the yield stress, ultimate tensile strength and elongation at room temperature. These facts indicate thermal aging induced embrittlement of the steel, which are further evidenced by the intergranular cleavage cracks on fracture surfaces in impact tests and a wheel-spokes like fracture morphology in tensile tests. As thermal aging duration is further extended, the embrittlement seems saturated as manifested by consistent DBTTs and fracture morphologies. Based on the metallographic observations and Rietveld refinements of neutron diffraction patterns under different aging conditions, the possible mechanisms of the thermal aging induced embrittlement are discussed.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 720, 21 March 2018, Pages 169-175
Journal: Materials Science and Engineering: A - Volume 720, 21 March 2018, Pages 169-175
نویسندگان
Ruisi Xing, Dunji Yu, Guofu Xie, Zhihai Yang, Xuxin Wang, Xu Chen,