利用几何优化的搅拌设备改善半固态搅拌法制备的B_4C_p/A356复合材料的颗粒分布均匀性
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摘要
本工作旨在验证几何优化的搅拌设备对半固态搅拌法制备的B_4C_p/A356复合材料颗粒分布均匀性的改善效果。通过建立几何参数优化后的搅拌设备模型,用FLUENT软件模拟和分析了半固态搅拌法(SSSM)制备的B_4C_p/A356的流场,并分别用普通搅拌设备和优化的搅拌设备制备出B_4C_p/A356铝锭,然后从宏观与微观的角度分析了B_4C颗粒的分散效果。模拟与分析结果表明:优化后的搅拌设备在半固态铝液(SSAL)中搅拌时,能够产生促进B_4C颗粒分散的三层非等速交汇涡流;桨叶倾斜角为60°的二层对推正交式搅拌桨增大了桨叶与半固态铝液的接触面积,且使下层铝液中的B_4C颗粒分布更为均匀。
The present work aimed to evaluate the performance of a geometrically optimized stirring apparatus designed for the semisolid state stirring preparation of particle-reinforced aluminum matrix composite,from the perspective of improving particle distribution uniformity. We simulated the flow field of the material system during the semisolid state stirring of B_4C_p/A356 composite by using the FLUENT software while applying the stirring apparatus model with the optimized geometric parameters. We then prepared B_4C_p/A356 aluminum ingots using ordinary stirring apparatus and geometrically optimized stirring apparatus,respectively,and analyzed both macroscopically and microscopically the distribution of B_4 C particles in the matrices. The simulation and analysis results showed that the geometrically optimized stirring apparatus can generate an inconstant velocity intersect vortex beneficial to the dispersion of B_4 C particles when agitates in the semisolid state aluminum liquid( SSAL). The duallayer pair-pushing orthogonal paddle with a blade tilt angle of 60° leads to a larger contact area between the blade and the SSAL,and in consequence,contributes to more uniform distribution of B_4 C particles in the lower part of aluminum matrix.
The present work aimed to evaluate the performance of a geometrically optimized stirring apparatus designed for the semisolid state stirring preparation of particle-reinforced aluminum matrix composite,from the perspective of improving particle distribution uniformity. We simulated the flow field of the material system during the semisolid state stirring of B_4C_p/A356 composite by using the FLUENT software while applying the stirring apparatus model with the optimized geometric parameters. We then prepared B_4C_p/A356 aluminum ingots using ordinary stirring apparatus and geometrically optimized stirring apparatus,respectively,and analyzed both macroscopically and microscopically the distribution of B_4 C particles in the matrices. The simulation and analysis results showed that the geometrically optimized stirring apparatus can generate an inconstant velocity intersect vortex beneficial to the dispersion of B_4 C particles when agitates in the semisolid state aluminum liquid( SSAL). The duallayer pair-pushing orthogonal paddle with a blade tilt angle of 60° leads to a larger contact area between the blade and the SSAL,and in consequence,contributes to more uniform distribution of B_4 C particles in the lower part of aluminum matrix.
引文
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2 Nie K B,Wang X J,Wu K,et al. Journal of Alloys&Compounds,2011,509(35),8664.
3 Amirkhanlou S,Niroumand B. Journal of Materials Processing Technology,2012,212(4),351.
4 Xu H,Luo Q,Zhou B,et al. Materials&Design,2012,34,452.
5 Selvam J D R,Smart D S R,Dinaharan I. Materials&Design,2013,49(16),28.
6 Zhang L J,Qiu F,Wang J G,et al. Materials Science&Engineering A,2015,626,338.
7 Zhang Z L,Zhang Z F,Xu J,et al. Materials Review B; Research Papers,2017,31(5),141(in Chinese).张桢林,张志峰,徐骏,等.材料导报:研究篇,2017,31(5),141.
8 Zhang H,Geng L,Guan L,et al. Materials Science&Engineering A,2010,528(1),513.
9 Ferasat K,Aashuri H,Kokabi A H,et al. Metallurgical and Materials Transactions A,2015,46(2),762.
10 Qi H B,Ding Z L,Fan Y C,et al. Journal of Composite Materials,2001,18(1),62(in Chinese).齐海波,丁占来,樊云昌,等.复合材料学报,2001,18(1),62.
11 Nan H Q,Li J S,Ju S H,et al. Rare Metal Materials and Engineering,2008,37(11),2041(in Chinese).南宏强,李金山,巨少华,等.稀有金属材料与工程,2008,37(11),2041.
12 Guan L N,Geng L,Zhang H W,et al. Transactions of Nonferrous Metals Society of China,2011,21(31),274.
13 Ravi B,Naik B B,Prakash J U. Materials Today Proceedings,2015,2(4-5),2984.
14 Zhang L J,Qiu F,Wang J G,et al. Materials Science&Engineering A,2015,626,338.
15 Balaji V,Sateesh N,Hussain M M. Materials Today Proceedings,2015,2(4-5),3403.
16 Qin X H,Xiao B L,Dong S M,et al. Journal of Materials Science,2007,42(10),3488.
17 Sukumaran K,Pai B C,Chakraborty M. Materials Science&Engineering A,2004,369(1),275.
18 Haghayeghi R,Zoqui E J,Halvaee A,et al. Journal of Materials Processing Technology,2005,169(3),382.
19 Nafisi S,Ghomashchi R. Materials Science&Engineering A,2006,437(2),388.
20 Guan R G,Lian C,Zhao Z Y,et al. Rare Metal Materials and Engineering,2012(S2),607(in Chinese).管仁国,连超,赵占勇,等.稀有金属材料与工程,2012(S2),607.
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22 Prasad K V,Jayadevan K R. Procedia Technology,2016,24,356.
23 Zhu X Z,Xie Y J,Miao Y. Journal of Liaoning University Petroleum&Chemical Technology,2005,25(4),48(in Chinese).朱向哲,谢禹钧,苗一.辽宁石油化工大学学报,2005,25(4),48.
24 Kreiling M. Transactions of Nonferrous Metals Society of China,2014,84(2),245.