کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1585995 1514925 2006 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Investigation on the microstructural refinement of an Mg–6 wt.% Zn alloy
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
Investigation on the microstructural refinement of an Mg–6 wt.% Zn alloy
چکیده انگلیسی

The possibility to refine the microstructure of an Mg–6 wt.% Zn alloy utilising a physical grain refinement mechanism employing melt shearing under turbulence and casting near the liquidus temperature has been explored and compared against chemical grain refinement by Zr master alloy. The extremely coarse dendritic solidification microstructure of the base alloy can be somewhat refined through near liquidus-temperature casting. Employing melt shearing under turbulence in conjunction with liquidus-temperature casting promotes dramatic grain refinement and uniform polycrystalline microstructure throughout the cross section. The extent of microstructural refinement and uniformity achieved is better than chemical grain refinement using Zr containing master alloy in this investigation possibly due to inefficient Zr dissolution in the latter. The combination of chemical and physical grain refining promotes about a further 10% reduction in grain size over sheared and liquidus cast microstructures.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 419, Issues 1–2, 15 March 2006, Pages 349–356
نویسندگان
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