کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7978490 1514715 2015 16 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Hot deformation and dynamic recrystallization behaviors of Mg-Gd-Y-Zr alloy
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
Hot deformation and dynamic recrystallization behaviors of Mg-Gd-Y-Zr alloy
چکیده انگلیسی
Hot deformation and dynamic recrystallization (DRX) behaviors of Mg-8.3Gd-2.6Y-0.4Zr alloy were investigated by uniaxial compression tests conducted at temperatures ranging from 300 °C to 500 °C and strain rates varying from 0.001 s−1 to 1 s−1. The results reveal that the alloy exhibits a high deformability due to the DRX softening when the temperature is >400 °C. Apart from the premature failure at relative low temperatures, the stress-strain curves exhibit typical features of DRX that the flow stress presents a peak and then gradually declines to a steady-state. Optical microscopy examinations exhibit that DRX takes place dominantly either at twin boundaries or initial grain boundaries depending on the deformation conditions. With increasing temperature or decreasing strain rate, the DRX sites would transfer from the twin boundaries to initial grain boundaries gradually. The analysis of transmission electron microscopy (TEM) images indicates that the deformation is controlled by basal slip and twinning in the temperature range of 300-350 °C, continuous DRX associated with the operation of multiple slips plays a dominant role when temperature is >400 °C.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 628, 25 March 2015, Pages 311-318
نویسندگان
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