کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1574379 | 1514706 | 2015 | 16 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Hot ductility behavior of an extruded 7075 aluminum alloy
ترجمه فارسی عنوان
رفتار انعطاف پذیری داغ از یک آلیاژ آلومینیومی 7075 اکسترود شده
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کلمات کلیدی
آلیاژ آلومینیوم، رطوبت گرم، روند ترمیم، حساسیت نرخ فشار، بارش، فراکتوگرافی،
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
دانش مواد (عمومی)
چکیده انگلیسی
The ductility behavior of an extruded 7075 aluminum alloy was studied using the tensile testing method in a wide range of temperatures (100-450 °C) and strain rates (10â1-10-3 sâ1). The mechanical behavior of the experimental alloy at high temperatures was also studied through hot compression testing method to explain the related deformation mechanisms. The results indicated that the ductility was monotonically increased by increasing deformation temperature. This was justified considering the fact that the volume fractions of the second phase particles might decrease at higher temperature thereby their detrimental effects on cavity nucleation and growth would be decreased. However, two regions were found where the general trend changed and the ductility decreased. The observed ductility drops at 350 °C/0.01, 0.001 sâ1 were attributed to the dynamic precipitation of Fe-rich secondary phases during deformation. The second ductility trough was observed at 450 °C/0.1 sâ1 and attributed to the occurrence of grain boundary sliding phenomena, which would facilitate the development of W-type or R-type cracks thereby reducing the ductility.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 637, 18 June 2015, Pages 107-122
Journal: Materials Science and Engineering: A - Volume 637, 18 June 2015, Pages 107-122
نویسندگان
M. Taheri-Mandarjani, A. Zarei-Hanzaki, H.R. Abedi,