کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1445609 1509595 2014 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Quantitative damage and detwinning analysis of nanotwinned copper foil under cyclic loading
ترجمه فارسی عنوان
آسیب کمی و تجزیه و تحلیل انفجار نانولوله های مس تحت بارگذاری سیکل
کلمات کلیدی
خستگی، آزمون با توان بالا فلز نانولوله کشیدن فلز مس
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
چکیده انگلیسی

High-purity Cu samples containing parallel columns of highly aligned nanotwins with median spacing of ∼25 nm were subjected to tension–compression cyclic loading by a high-throughput cyclic testing method. The methodology utilizes gradients in surface strain amplitude of a vibrating cantilever: one along the beam axis, with decreasing strain from the fixed to the free end of the beam, and the other through the foil thickness with decreasing strain from the surface to the neutral axis. Systematic microstructural investigations indicate that nanotwins are not stable under cyclic loading and that the applied strain amplitude has a strong influence on the resulting twin structure. In the highly stressed regions the detwinning process produces a twin free microstructure, allowing for subsequent extrusion and crack formation, and introduces fatal defects into structural parts.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Acta Materialia - Volume 81, December 2014, Pages 184–193
نویسندگان
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