کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1448359 988671 2008 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Creep- and coarsening properties of Al–0.06 at.% Sc–0.06 at.% Ti at 300–450 °C
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Creep- and coarsening properties of Al–0.06 at.% Sc–0.06 at.% Ti at 300–450 °C
چکیده انگلیسی

Upon aging at 300–450 °C, nanosize, coherent Al3(Sc1−xTix) precipitates are formed in pure aluminum micro-alloyed with 0.06 at.% Sc and 0.06 at.% Ti. The outstanding coarsening resistance of these precipitates at these elevated temperatures (61–77% of the melting temperature of aluminum) is explained by the significantly smaller diffusivity of Ti in Al when compared to that of Sc in Al. Furthermore, this coarse-grained alloy exhibits good compressive creep resistance for a castable, heat-treatable aluminum alloy: the creep threshold stress varies from 17 MPa at 300 °C to 7 MPa at 425 °C, as expected if the climb bypass by dislocations of the mismatching precipitates is hindered by their elastic stress fields.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Acta Materialia - Volume 56, Issue 16, September 2008, Pages 4369–4377
نویسندگان
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