کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5455121 1514635 2017 20 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effect of alloying elements on grain boundary sliding in magnesium binary alloys: Experimental and numerical studies
ترجمه فارسی عنوان
اثر عناصر آلیاژی بر مرز دانه ای کشویی در آلیاژهای دوتایی منیزیم: مطالعات تجربی و عددی
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد دانش مواد (عمومی)
چکیده انگلیسی
The effect of alloying elements on grain boundary sliding was systematically investigated using several binary magnesium alloys (X = Ag, Al, Li, Sn, Pb, Y and Zn) via both experimental and numerical methods. The alloying element clearly affected damping properties related to grain boundary sliding, as measured by nanoindentation tests. The properties, such as damping capacity and strain rate sensitivity, apparently depended on grain boundary characteristics, i.e., the grain boundary energy. By increasing and decreasing the grain boundary energy, the alloying element was found to play a role in enhancing and suppressing grain boundary sliding, respectively. First-principles calculations revealed that the lithium element had weak bonding to magnesium due to a few operations of the electric orbit. On the other hand, rare-earth elements exhibited relatively strong bonding to magnesium, because of electron interactions with the first nearest neighbor site, and tended to prevent grain boundary sliding. These results suggest that grain boundary energy is a reliable parameter for predicting grain boundary sliding and developing a magnesium alloy, which has good elongation-to-failure and/or secondary formability at room temperature.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 708, 21 December 2017, Pages 267-273
نویسندگان
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