کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1581029 | 1514852 | 2009 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Influence of extrusion parameters on microstructure and texture developments, and their effects on mechanical properties of the magnesium alloy AZ80
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Extrusion of the DC-cast alloy AZ80 has been performed at three extrusion ratios (12, 22 and 44) in the temperature range 175 °C â¤Â T â¤Â 350 °C. Upon extrusion, the as-cast coarse grains undergo pronounced grain refinement and the β-phase constituents form stringers in the extrusion direction. The activation of twinning at low extrusion temperatures promotes nucleation of the recrystallized grains at the twin interfaces and refines the grains size. The higher extrusion ratio increases the extrusion velocity and therefore raises the die exit temperature, which results in a slightly coarsen grain size. The unidirectional deformation and DRX during extrusion leads to a fibrous type of crystallographic texture, which results in anisotropy of the yield stress under tension and compression, usually called “strength differential effect” (SDE). The impact of the SDE weakens by lowering the extrusion temperature and remains unaffected by the variations in the extrusion ratio.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 506, Issues 1â2, 25 April 2009, Pages 141-147
Journal: Materials Science and Engineering: A - Volume 506, Issues 1â2, 25 April 2009, Pages 141-147
نویسندگان
Muhammad Shahzad, Lothar Wagner,