کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1584443 1514903 2007 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effect of Mg on the fracture characteristics of cast Al–7Si–Mg alloys
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
Effect of Mg on the fracture characteristics of cast Al–7Si–Mg alloys
چکیده انگلیسی

The fracture behavior of Al–7Si–Mg cast alloys mainly depends on the size and shape of eutectic silicon particles and iron-rich intermetallics. These can be altered by many ways such as, chemical modification, cooling rate, magnesium content and iron-rich intermetallics. Magnesium increases the matrix strength, but decreases the ductility. Further, cast Al–7Si–Mg alloys can be strengthened by heat treatment processes to attain desirable mechanical properties. Crack tortuosity, crack branching factor (CBF) and tendency of crack propagation through eutectic regions are quantified in order to study the formation and growth of fatigue crack. The crack propagation in the Al–Si–Mg alloys depends on the morphology of silicon particles, cell size and Mg content. The fracture toughness values measured are found to decrease with increase in magnesium content at the optimized T-6 heat treated condition.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volumes 445–446, 15 February 2007, Pages 405–414
نویسندگان
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