کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1636245 | 1516955 | 2015 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Directional growth behavior of α(Al) dendrites during concentration-gradient-controlled solidification process in static magnetic field
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Directional growth behavior of α(Al) dendrites during concentration-gradient-controlled solidification process in static magnetic field Directional growth behavior of α(Al) dendrites during concentration-gradient-controlled solidification process in static magnetic field](/preview/png/1636245.png)
چکیده انگلیسی
The large and small sized Cu (solid)/Al (liquid) couples were prepared to investigate the directional growth behavior of primary α(Al) phase during a concentration-gradient-controlled solidification process under various static magnetic fields (SMFs). The results show that in the large couples, the α(Al) dendrites reveal a directional growth character whether without or with the SMF. However, the 12 T magnetic field induces regular growth, consistent deflection and the decrease of secondary arm spacing of the dendrites. In the small couples, the α(Al) dendrites still reveal a directional growth character to some extent with a SMF of â¤5 T. However, an 8.8 T SMF destroys the directional growth and induces severe random deflections of the dendrites. When the SMF increases to 12 T, the α(Al) dendrites become quite regular despite of the consistent deflection. The directional growth arises from the continuous long-range concentration gradient field built in the melt. The morphological modification is mainly related to the suppression of natural convections and the induction of thermoelectric magnetic convection by the SMF.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Transactions of Nonferrous Metals Society of China - Volume 25, Issue 7, July 2015, Pages 2438-2445
Journal: Transactions of Nonferrous Metals Society of China - Volume 25, Issue 7, July 2015, Pages 2438-2445
نویسندگان
Lei LI, Bo XU, Wei-ping TONG, Li-zi HE, Chun-yan BAN, Hui ZHANG, Yu-bo ZUO, Qing-feng ZHU, Jian-zhong CUI,