کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
832441 1470368 2009 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Microstructure and mechanical properties of extruded Al–Si alloy (A356) in the semi-solid state
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی (عمومی)
پیش نمایش صفحه اول مقاله
Microstructure and mechanical properties of extruded Al–Si alloy (A356) in the semi-solid state
چکیده انگلیسی

Smooth round bars were produced from conventional non-modified cast alloy, A356, by semi-solid extrusion after isothermal holding in mushy zone. Extrusion process was carried out in an apparatus, designed and prepared for this purpose at a ram speed, 2.5 mm/s. Three forming temperatures: 560, 570 and 580 °C; three isothermal holding times: 5, 30 and 60 min; and two extrusion reduction ratios: 5.3 and 17.8 were the used parameters. A clear modification of eutectic phase and an improvement in hardness and tensile properties were found compared with those of conventional casting. The tensile test specimens fracture surfaces were examined using SEM. Furthermore, wear resistance, fatigue strength and impact energy were also, improved significantly.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials & Design - Volume 30, Issue 10, December 2009, Pages 4469–4477
نویسندگان
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