کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7971535 | 1514608 | 2018 | 38 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Grain refinement of non-equiatomic Cr-rich CoCrFeMnNi high-entropy alloys through combination of cold rolling and precipitation of Ï phase
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله

چکیده انگلیسی
Grain refinement of non-equiatomic Cr-rich CoCrFeMnNi high-entropy alloys with an fcc structure was studied focusing on the precipitation of a Cr-rich Ï phase along grain boundaries and shear bands. We found for the first time that the Ï phase can be precipitated at the grain boundaries and the shear bands in the alloys at a significantly fast precipitation rate. The Ï phase effectively suppressed the grain growth of the fcc matrix during recrystallization of the alloy after conventional cold rolling, resulting in a fine-grained microstructure with a mean diameter of approximately 1â¯Âµm. The alloys with this fine microstructure containing the Ï phase exhibit high strength over a wide temperature range due to grain boundary strengthening and precipitation strengthening caused by the Ï phase. Moreover, the alloys exhibit large ductility not only at room and high temperatures, but also at low temperatures. Deformation-induced twinning plays an important role in this ductility.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 735, 26 September 2018, Pages 191-200
Journal: Materials Science and Engineering: A - Volume 735, 26 September 2018, Pages 191-200
نویسندگان
Ken Cho, Yumi Fujioka, Takeshi Nagase, Hiroyuki Y. Yasuda,