کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1580644 | 1514843 | 2009 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Hot deformation and processing maps of an Al-5.7Â wt.%Mg alloy with erbium
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Hot deformation and processing maps of an Al-5.7Â wt.%Mg alloy with erbium Hot deformation and processing maps of an Al-5.7Â wt.%Mg alloy with erbium](/preview/png/1580644.png)
چکیده انگلیسی
The hot deformation behavior of an Al-5.7 wt.%Mg alloy with erbium has been investigated. Compression tests are performed in the temperature range of 300-500 °C and in the strain rate ranging from 0.001 sâ1 to 50 sâ1 up to a true strain of 0.7. The processing maps are developed at different strains and the standard kinetic analysis has been applied to evaluate the rate controlling mechanisms. The processing maps have exhibited two domains of 350-450 °C at 0.001-0.03 sâ1 and 450-500 °C at 0.01-1 sâ1, representing dynamic recovery of Al-5.7 wt.%Mg with erbium. The apparent activation energies estimated in these two domains are 180 kJ/mol and 163 kJ/mol respectively, which suggests that cross-slip of dislocation and lattice self-diffusion are the deformation mechanisms. At strain rates higher than 10 sâ1, the flow curves demonstrate flow softening behavior, and the flow instability regions reveal mixed microstructure of local deformation and dynamic recrystallization.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 517, Issues 1â2, 20 August 2009, Pages 132-137
Journal: Materials Science and Engineering: A - Volume 517, Issues 1â2, 20 August 2009, Pages 132-137
نویسندگان
Meng Gang, Li Bolong, Li Hongmei, Huang Hui, Nie Zuoren,