کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1579732 1001230 2010 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
The characteristics of aluminum–scandium alloys processed by ECAP
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
The characteristics of aluminum–scandium alloys processed by ECAP
چکیده انگلیسی

Aluminum–scandium alloys were prepared having different scandium additions of 0.2, 1.0 and 2.0 wt.% and these alloys were processed by equal-channel angular pressing (ECAP) at 473 K. The results show the grain refinement of the aluminum matrix and the morphology of the Al3Sc precipitates depends strongly on the scandium concentration. The tensile properties were evaluated after ECAP by pulling to failure at initial strain rates from 1.0 × 10−3 to 1.0 × 10−1 s−1. The Al–1% Sc alloy exhibited the highest tensile strength of ∼250 MPa at a strain rate of 1.0 × 10−1 s−1. This alloy also exhibited a superior grain refinement of ∼0.4 μm after ECAP where this is attributed to a smaller initial grain size and an optimum volume fraction of dispersed Al3Sc precipitates having both micrometer and nanometer sizes.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 527, Issue 6, 15 March 2010, Pages 1448–1452
نویسندگان
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