کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5456599 1514664 2017 31 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Microstructure and mechanical properties of AZX912 magnesium alloy extruded at different temperatures
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
Microstructure and mechanical properties of AZX912 magnesium alloy extruded at different temperatures
چکیده انگلیسی
The microstructure and mechanical properties of flame-resistant AZX912 magnesium alloy extruded at different temperatures in the range of 250-400 °C were investigated. With decreasing extrusion temperature from 400 °C to 250 °C, the grain size of dynamically recrystallized grains significantly decreased from 13.6 to 1.8 µm, and the amount of fine Mg17Al12 precipitates, with sizes of 50-200 nm, increased due to dynamic precipitation. The extrusion texture, with the basal plane and <101¯0> direction, mostly parallel to the extrusion direction, was remarkably strengthened as the extrusion temperature increased. This may be attributed to the enhanced activity of the prismatic slip. Nanoscale Mg17Al12 precipitates significantly enhanced the mechanical strength, but deteriorated the ductility. The bar extruded at 250 °C exhibited the highest mechanical strength, which was due to the combined effect of the remarkably refined grain structure and the large amount of nanoscale Mg17Al12 precipitates. The extrusion at 400 °C resulted in the lowest tensile elongation, which was attributed to both grain coarsening and basal texture strengthening. The bar extruded at 300 °C exhibited a good balance between mechanical strength and tensile ductility.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 679, 2 January 2017, Pages 162-171
نویسندگان
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