کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1548326 | 997733 | 2011 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Influence of stacking fault energy on formation of long period stacking ordered structures in Mg-Zn-Y-Zr alloys
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
مواد الکترونیکی، نوری و مغناطیسی
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چکیده انگلیسی
The influence of alloying elements on the stacking fault energy (SFE) of Mg-Y-Zn-Zr alloys was calculated by using first-principles, and the microstructure of as-cast Mg-1.05Y-0.79Zn-0.07Zr (mole fraction, %) alloy prepared by conventional casting was investigated by SEM, TEM and HRTEM. The block-like long period stacking ordered (LPSO) phase, the lamellar LPSO phase and stacking faults were observed simultaneously and the lamellar LPSO structure and stacking faults were both formed on (0001)α-Mg habit plane and grown or extended along [01i0]α-Mg direction. The calculation results by the first-principles showed that the addition of Y can sharply decrease the stacking fault energy of the Mg-Zn-Y-Zr alloy, while Zn slightly increases the stacking fault energy of the alloy. The influence of stacking fault energy on the formation of LPSO was discussed. It shows that LPSO may nucleate directly through stacking faults and the lower stacking fault energy was in favor of formation of LPSO.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Progress in Natural Science: Materials International - Volume 21, Issue 6, December 2011, Pages 485-490
Journal: Progress in Natural Science: Materials International - Volume 21, Issue 6, December 2011, Pages 485-490
نویسندگان
Fu-sheng PAN, Su-qin LUO, Ai-tao TANG, Jian PENG, Yun LU,