کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1581010 | 1514852 | 2009 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Microstructural evolution of an ECAE-formed ZK60-RE magnesium alloy in the semi-solid state
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Microstructural evolution of an ECAE-formed ZK60-RE magnesium alloy in the semi-solid state Microstructural evolution of an ECAE-formed ZK60-RE magnesium alloy in the semi-solid state](/preview/png/1581010.png)
چکیده انگلیسی
AZ91D magnesium alloy semi-solid billets prepared by the strain-induced melt activation (SIMA) process have been proposed or reported in previous literature. However, no detailed investigation has been conducted regarding Mg-Zn-Zr series magnesium alloys. In this paper, the microstructural evolution of ZK60 magnesium alloy with a rare earth (RE) addition during partial remelting has been studied. Equal channel angular extrusion (ECAE) was introduced into the SIMA process to replace conventional upset or extrusion. The results show that as-cast ZK60-RE magnesium alloys are successfully extruded by ECAE. The semi-solid microstructure of ECAE-formed ZK60-RE consists of fine and spheroidal grains surrounded by grain boundary liquid films. The cubic coarsening rate constant, K, increases from 255 to 371 μm3 sâ1 when the solid fraction decreases from 0.75 (600 °C) to 0.65 (615 °C). With increasing numbers of ECAE passes, which means increasing distortion energy, grain sizes are finer and liquid formation rates are enhanced. This kind of research encourages the belief that the combination of ECAE and partial remelting in the semi-solid state can produce magnesium alloy semi-solid billet with fine and spheroidal grains, which is suitable for semi-solid processing.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 506, Issues 1â2, 25 April 2009, Pages 8-15
Journal: Materials Science and Engineering: A - Volume 506, Issues 1â2, 25 April 2009, Pages 8-15
نویسندگان
Zude Zhao, Qiang Chen, Yanbin Wang, Dayu Shu,