کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7999043 | 1516261 | 2015 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Continued growth controlling of the non-preferred primary phase for the parallel lamellar structure in directionally solidified Ti-50Al-4Nb alloy
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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: Continued growth controlling of the non-preferred primary phase for the parallel lamellar structure in directionally solidified Ti-50Al-4Nb alloy Continued growth controlling of the non-preferred primary phase for the parallel lamellar structure in directionally solidified Ti-50Al-4Nb alloy](/preview/png/7999043.png)
چکیده انگلیسی
Bridgman-type directional solidification experiments were conducted for Ti-50Al-4Nb alloy. The continued growth of the non-preferred primary phase with the effect of the growth rate was investigated for the parallel lamellar structure. The planar-cellular-dendritic growth of primary α phase is observed with increasing growth rate and α2/γ lamellar structure is obtained finally. The growth of the non-preferred crystals is blocked by the nucleated preferred crystals at low growth rates (<3 μm/s) due to the external particles, as well as that at high growth rates (⩾15 μm/s) due to the tilting crystals and the high undercooling. While the continued growth of the non-preferred crystals is achieved at proper middle growth rates, which always takes on a slope form owning the developed lateral dendrites. Finally the parallel columnar crystals with the parallel lamellar structure are obtained at selected growth rates (5-7 μm/s) by controlling the continued growth of the preliminary non-preferred crystals at the initial interface.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 632, 25 May 2015, Pages 152-160
Journal: Journal of Alloys and Compounds - Volume 632, 25 May 2015, Pages 152-160
نویسندگان
Guohuai Liu, Zhaodong Wang, Xinzhong Li, Yanqing Su, Jingjie Guo, Hengzhi Fu, Guodong Wang,