کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1576561 | 1514778 | 2013 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
High temperature deformation characteristics of equal channel angular pressed AA6082-T6
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
High temperature deformation behavior of 6082AA that was over aged and pressed to 6 passes in equal channel angular die via route C was investigated. High-temperature tensile deformation was conducted in the range of 753 to 823 K at four strain rates in the range of 10â2-6Ã10â1 sâ1. Stress dependence of the strain rate revealed a stress exponent, n of 7 throughout the ranges of temperatures and strain rates tested. The apparent activation energy was calculated to be 223 kJ moleâ1. These findings implied the presence of threshold and by incorporating the threshold stress in the analysis, the true activation energy was calculated to be about 139 kJ molâ1. A plot of normalized strain rate (εÌkT/DGb) vs. normalized effective stress (Ï-Ïo)/G, on a double logarithmic scale, gave an n value of 5. Ductility increased with strain rate for all the temperature ranges and maximum ductility value of 173% was achieved at 823 K for 6Ã10â1 sâ1.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 565, 10 March 2013, Pages 301-307
Journal: Materials Science and Engineering: A - Volume 565, 10 March 2013, Pages 301-307
نویسندگان
Ehab A. El-Danaf, Muneer Baig,