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
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
High temperature deformation characteristics of equal channel angular pressed AA6082-T6
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 10−2-6×10−1 s−1. 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 mole−1. 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 mol−1. A plot of normalized strain rate (ε̇kT/DGb) vs. normalized effective stress (σ-σo)/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 6×10−1 s−1.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 565, 10 March 2013, Pages 301-307
نویسندگان
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