کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7964185 1514169 2016 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
The influence of stress state on the reorientation of hydrides in a zirconium alloy
ترجمه فارسی عنوان
تأثیر وضعیت استرس بر تغییر جهت هیدرید ها در یک آلیاژ زیرکونیوم
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی انرژی انرژی هسته ای و مهندسی
چکیده انگلیسی
Hydride reorientation can occur in spent nuclear fuel cladding when subjected to a tensile hoop stress above a threshold value during cooling. Because in these circumstances the cladding is under a multiaxial stress state, the effect of stress biaxiality on the threshold stress for hydride reorientation is investigated using hydrided CWSR Zircaloy-4 sheet specimens containing ∼180 wt ppm of hydrogen and subjected to a two-cycle thermo-mechanical treatment. The study is based on especially designed specimens within which the stress biaxiality ratios range from uniaxial (σ2/σ1 = 0) to “near-equibiaxial” tension (σ2/σ1 = 0.8). The threshold stress is determined by mapping finite element calculations of the principal stresses and of the stress biaxiality ratio onto the hydride microstructure obtained after the thermo-mechanical treatment. The results show that the threshold stress (maximum principal stress) decreases from 155 to 75 MPa as the stress biaxiality increases from uniaxial to “near-equibiaxial” tension.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Nuclear Materials - Volume 477, 15 August 2016, Pages 157-164
نویسندگان
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