کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5454749 | 1514359 | 2017 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Stabilization of nanocrystalline Cu by Al addition
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Nanocrystalline Cu-14 at.% Al alloy was synthesised by cryomilling. Milled powder was then annealed up to T/Tm = 0.87 and corresponding changes in grain size (by X-ray peak broadening analysis) and hardness values were recorded. The hardness of the milled powder (3.28 GPa) decreases only ~ 17% (2.73 GPa) after annealing at T/Tm = 0.87. The improved thermal stability was attributed to the dispersion of nanoscale intermetallic (CuAl2) phase, observed by Transmission electron microscopy (TEM) investigation of the annealed samples. The closure agreement of theoretically estimated mechanical property (hardness) with the experimentally obtained one elicits kinetic stabilisation (i.e. grain boundary pinning by intermetallic particles) is the governing strengthening mode at high temperatures.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Characterization - Volume 128, June 2017, Pages 189-194
Journal: Materials Characterization - Volume 128, June 2017, Pages 189-194
نویسندگان
Somraj Chakravarty, Koushik Sikdar, Debdas Roy,