کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1583371 1514892 2007 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Superplasticity in an Al–Mg–Zr–Sc alloy produced by equal-channel angular pressing
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
Superplasticity in an Al–Mg–Zr–Sc alloy produced by equal-channel angular pressing
چکیده انگلیسی

The high-temperature plastic deformation of an Al–4.5 wt.% Mg–0.2 wt.% Zr–0.2 wt.% Sc alloy subjected to equal-channel angular pressing was studied, as well as its microstructure. The alloy exhibits high strain rate superplasticity in the temperature range of 573–798 K. Exceptionally high elongations to failure were achieved when testing at an initial strain rate of 4.5 × 10−2 s−1—2130% at 773 K and 1950% at 798 K. At these temperatures, the strain rate sensitivity parameter m exceeded the value of 0.6. The grain size after pressing was <1 μm. The microstructure exhibited exceptional stability, with the grain size <10 μm at a temperature as high as 798 K, due to the presence of Al3(ZrxSc1−x) precipitates.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 462, Issues 1–2, 25 July 2007, Pages 91–94
نویسندگان
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