کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
771229 | 897615 | 2008 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Analysis of ductility of nanostructured copper prepared by powder metallurgy
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
سایر رشته های مهندسی
مهندسی مکانیک
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The strain rate sensitivity (m) was determined as a function of the strain rate using mechanical jump tests, on a nanostructured copper (grain size of 90 nm) prepared by powder metallurgy. The largest value is m = 0.050 ± 0.005, measured at 1 × 10−5 s−1. Apparent activation volume was derived giving an insight of the micromechanisms involved in the plastic deformation. Nanostructured face centred cubic metals exhibit elongation due to their strain rate sensitivity and the related delay in the localisation of the deformation. The present analysis brings elements of the micromechanism involved in the plasticity, providing with the guide to design a relevant ultra-fine grained architecture with improved ductility.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Engineering Fracture Mechanics - Volume 75, Issue 12, August 2008, Pages 3624–3632
Journal: Engineering Fracture Mechanics - Volume 75, Issue 12, August 2008, Pages 3624–3632
نویسندگان
Yannick Champion, Cyril Langlois, Sandrine Guérin, Cécilie Duhamel,