کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7971320 1514405 2013 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Characteristics of thixoformed A356 aluminum thin plates with microchannels
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
Characteristics of thixoformed A356 aluminum thin plates with microchannels
چکیده انگلیسی
A356 aluminum thin plates with a thickness of 1.2 mm were produced via thixoforming process under different temperatures ranging from 585 °C to 610 °C. In addition to large primary α-Al grains, unique fine secondary α-Al grains (equivalent diameter below ~ 8 μm) were revealed through microstructural examinations. These secondary α-Al particles exhibited irregular morphology at 590 °C, which gradually transformed into equiaxed/globular grains at higher thixoforming temperatures of 605 °C and 610 °C. On the other hand, their size (the equivalent diameter of the grains) continuously increased from 3.2 ± 0.16 μm at 590 °C to 8.1 ± 0.4 μm at 610 °C. Energy dispersive X-ray spectroscopic analyses showed that the Si concentration gradually increased within these secondary α-Al grains. A quenched modified morphology consisting of angular and finely branched eutectic silicon was observed at the thixoforming temperature of 590 °C, which seemed that it changed to a fibrous morphology at 605 °C and 610 °C. By increasing the thixoforming temperature, the elongation of the thixoformed plates monotonically increased to 12.6 ± 0.4% at 610 °C, whereas the ultimate tensile strength reached its highest value of 280 ± 12 MPa at 600 °C then experienced the sharp reductions at 605 °C and 610 °C.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Characterization - Volume 82, August 2013, Pages 86-96
نویسندگان
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