کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1623543 1516411 2008 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Semi-solid microstructure evolution during reheating of aluminum A356 alloy deformed severely by ECAP
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
Semi-solid microstructure evolution during reheating of aluminum A356 alloy deformed severely by ECAP
چکیده انگلیسی

Semi-solid metal forming is a new developing technology that has some advantages in relation to other forming and casting technologies like high pressure die casting. This process contains three main steps: feedstock manufacturing, reheating and forming. Producing feedstocks with non-dendritic and spherical microstructure is one of the considerable factors in semi-solid forming. Feedstock manufacturing can be carried out with casting methods and solid-state methods. In solid-state processes like SIMA, remelting stage and related contamination is eliminated which is especially useful for active metals. In this research, Al (A356) has been used and in order to induce strains, equal channel angular pressing (ECAP) has been utilized. ECAP is one of the most effective and practical sever plastic deformation (SPD) methods to induce a great strain. In this study specimens were ECAPed for one to four passes to examine the effect of strain on the morphology and shape factor of reheated alloy. Conclusions indicate that with increase of strain, sphericity of particles increases, their size will decrease and sphericity takes place in less reheating time.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 466, Issues 1–2, 20 October 2008, Pages 67–72
نویسندگان
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