کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1582684 1514876 2008 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Aging behaviour of Al-Cu-Mg alloy-SiC composites
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
Aging behaviour of Al-Cu-Mg alloy-SiC composites
چکیده انگلیسی
The age-hardening kinetics of powder metallurgy processed Al-Cu-Mg alloy and composites with 5, 15 or 25 vol.% SiC reinforcements, subjected to solution treatment at 495 °C for 0.5 h or at 504 °C for 4 h followed by aging at 191 °C, have been studied. The Al-SiC interfaces in composites show undissolved, coarse intermetallic precipitates rich in Cu, Fe, and Mg, with its extent varying with processing conditions. Examination of aging kinetics indicates that the peak-age hardness values are higher, and the time taken for peak aging is an hour longer on solutionizing at 504 °C for 4 h, due to greater solute dissolution. Contrary to the accepted view, the composites have taken longer time to peak-age than the alloy, probably due to lower vacancy concentration, large-scale interfacial segregation of alloying elements, and inadequate density of dislocations in matrix. The composite with 5 vol.% SiC with the lowest inter-particle spacing has shown the highest hardness.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 480, Issues 1–2, 15 May 2008, Pages 496-505
نویسندگان
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