کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1449692 988712 2007 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Refining mechanism of the electric current pulse on the solidification structure of pure aluminum
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Refining mechanism of the electric current pulse on the solidification structure of pure aluminum
چکیده انگلیسی

The refining mechanism of the electric current pulse (ECP) on the solidification structure of pure aluminum is systematically investigated by properly designed experiments. The experiment results show that the solidification structure cannot be refined by exerting an ECP on the high temperature liquid phase, indicating that the ECP has no inoculation effect on the liquid metal. The ECP has also no obvious influence on the solidification structure when it is applied during crystal growth, showing that the ECP cannot cause melting or break off the growing crystal. However, the very fine macrostructure is obtained by applying an ECP during the nucleation of the melt. The reason is that the ECP makes the crystal nuclei formed on the wall of the mould fall off and move freely in the molten metal, promoting the multiplication of crystal nuclei.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Acta Materialia - Volume 55, Issue 9, May 2007, Pages 3103–3109
نویسندگان
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