کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
9795907 1514937 2005 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Cyclic deformation behavior in pure Cu with growth-in twins
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
Cyclic deformation behavior in pure Cu with growth-in twins
چکیده انگلیسی
A polycrystalline pure copper sample with high density of growth-in twins was synthesized by means of electro-deposition technique. Symmetrical push-pull cyclic deformation was performed at constant axial plastic strain amplitude in the range of 1.1 × 10−4 ≤ ɛpl ≤ 3.9 × 10−3. At low strain amplitudes (ɛpl = 1.1 × 10−4, 2.1 × 10−4), the initial cyclic hardening of Cu sample was found to be similar to that of single crystal Cu, and secondary softening was found. At higher strain amplitudes (ɛpl = 1.0 × 10−3, 1.8 × 10−3), cyclic stress reached the saturation rapidly, neither secondary softening nor secondary hardening was found. Investigations of dislocation configurations show that twin boundaries play a crucial role in the plastic deformation at higher strain amplitudes for Cu. A special wall structure, i.e. persistent slip bands (PSB)-like structure, was found inside the twin lamellae, which may induce the saturation cyclic behavior in Cu.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 405, Issues 1–2, 25 September 2005, Pages 239-245
نویسندگان
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