کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1630323 1006582 2013 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
The role of Al2Y in grain refinement in Mg–Al–Y alloy system
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
The role of Al2Y in grain refinement in Mg–Al–Y alloy system
چکیده انگلیسی

A series of Mg–10(Al + Y) alloys with various weight ratios of Al to Y were cast to investigate the role of Al2Y in grain refinement in Mg–Al–Y ternary system. Thermal analysis combined with microstructural and EDX analysis was used to determine the phase transformation temperatures during solidification process. Experimental results show that when the Al content is below 4 wt%, a peritectic reaction, L + Al2Y → α-Mg, occurs after the intermetallic Al2Y forms directly from the melt as a pro-peritectic phase. Once the Al content is above 4 wt%, an eutectic reaction occurs at a lower temperature. The presence of the pro-peritectic phase can lead to nucleation of α-Mg directly through a peritectic reaction although grain refining efficiency is also closely related to the active particle size. In the case where solidification does not involve a peritectic reaction, the growth restriction factor, quantitatively the Q-value, governs the grain refining efficiency. Higher Q-value corresponds to finer grains.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Magnesium and Alloys - Volume 1, Issue 2, June 2013, Pages 115–121
نویسندگان
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