کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1619757 1005724 2010 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
The investigation of continuous nucleation and refinement of primary Si in Al–30Si mushy zone
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
The investigation of continuous nucleation and refinement of primary Si in Al–30Si mushy zone
چکیده انگلیسی

In this paper, the refinement performance of Al–P master alloy on mushy Al–30Si alloys was investigated and a new refining method was proposed. The results show that primary Si can be refined partially when the Al–P master alloy is added into mushy Al–30Si alloys, proving that the heterogeneous nucleation of primary Si is a continuous process even in liquid–solid state, which is also confirmed by EPMA results. On basis of these results, a new refining method named as continuous refining method has been proposed, i.e. continuously adding refiners at different temperatures during the cooling and solidifying stage of Al–30Si. Compared with the conventional refinement method by which the alloys are refined at high temperature, better refinement effect can be obtained in the new refinement method: the average size of primary Si is decreased to 30 μm, and the tensile strength increases by 19.6%. Moreover, the mechanism of the continuous refining method was also discussed.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 502, Issue 2, 23 July 2010, Pages 304–309
نویسندگان
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