کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7879919 1509582 2015 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
On the reversibility of dislocation slip during small scale low cycle fatigue
ترجمه فارسی عنوان
در مورد برگشت پذیری لغزش در طول مقیاس کوچک کم خستگی چرخه
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
چکیده انگلیسی
The evolution of low cycle fatigue damage in copper is studied by in situ micro Laue diffraction. Free standing single crystalline micro-cantilevers with a cross-section of 10 × 10 μm2 were loaded in displacement controlled mode with a surface strain amplitude up to 5%. The point to point misorientation and the diffraction peak width as a measure of geometrically necessary dislocation density was analyzed locally during deformation and globally after 0, 1/4, 1/2, 3/4, 1 and multiples up to a maximum of 22 full cycles. Two different behaviors were observed (i) samples geometrically suppressing cross-slip show a steady state deformation pattern with dislocations in a pile-up. (ii) The sample with cross-slip does not reach a steady state with dislocations accumulating at the neutral plane.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Acta Materialia - Volume 94, 1 August 2015, Pages 69-77
نویسندگان
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