کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1624094 1516410 2009 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Grain refinement of Mg–Al based alloys by a new Al–C master alloy
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
Grain refinement of Mg–Al based alloys by a new Al–C master alloy
چکیده انگلیسی

A new Al–C master alloy for grain refinement on Mg–Al based alloys has been fabricated by powder metallurgy. Al4C3 is formed by reaction between part of f.c.c Al(C) solid solution and aluminum during fabrication, and the net-like mixture of Al4C3 and Al(C) solid solution is located at the boundaries of aluminum particles. Milling and pressing of graphite and aluminum powders change the nature of graphite and ensure the kinetics conditions of the reaction between the two phases. Grain refinement experiment shows Al–1C master alloy can efficiently refine AZ31 (Mg–3%Al–1%Zn). At 760 °C, when adding 2 wt.% Al–1C master alloy, the grain size is reduced sharply from 400 μm to 140 μm comparing to the sample added 2 wt.% commercial pure aluminum, and the grain morphology of α-Mg transits from a characteristic sixfold symmetrical shape to a petal-like shape.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 467, Issues 1–2, 7 January 2009, Pages 202–207
نویسندگان
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