Abstract: The purpose of this work is to comparatively investigate the solidification structure of in situ Mg2Si/Mg-Al composites obtained under pulsed magnetic field (PMF). We designed three material compositions, i.e. Mg-9Al-3Si, Mg-9Al-6Si and Mg-9Al-9Si, and determined macroscopic and microscopic microstructure of the composites solidified under conventional circumstances and with a PMF applied via optical microscopic observation. The results showed that the introduction of PMF during solidification process leads to obvious reduction in porosity and shrin-kage cavity. Meanwhile, the primary Mg2Si phases transform from coarse dendrites into fine blocks or small dendrites and distribute uniformly, but α-Mg grains are not refined. In the pulse frequency range of 0—20 Hz, PMF with higher frequencies can achieve better grain refinement effect for primary Mg2Si phase in the Mg-9Al-6Si composite.
1 Diqing W, Jincheng W, Gaifang W, et al. Materials Letters,2009,63(3),391. 2 Çiçek B, Ahlatçi H, Sun Y. Materials & Design,2013,50,929. 3 Liu X B, Zhao Y G, Yang W, et al. Journal of Jilin University (Engineering and Technology Edition),2011,41(6),1618(in Chinese). 刘晓波,赵宇光,杨雯,等.吉林大学学报:工学版,2011,41(6),1618. 4 Hu Y, Yan H, Chen G X, et al. Rare Metal Materials and Engineering,2009,38(2),343(in Chinese). 胡勇,闫洪,陈国香,等.稀有金属材料与工程,2009,38(2),343. 5 Qin Q D, Zhao Y G. Journal of Alloys & Compounds,2008,462(1),L28. 6 Hong Y, Yong H, Wu X Q. Transactions of Nonferrous Metals Society of China,2010,20,s411. 7 Liping W, Erjun G, Baoxia M. Journal of Rare Earths,2008,26(1),105. 8 Moussa M E, Waly M A, El-Sheikh A M. Journal of Magnesium and Alloys,2014,2(3),230. 9 Guo X F, Yang W P, Song P W, et al. Journal of Materials Enginee-ring,2011(11),62(in Chinese). 郭学锋,杨文朋,宋佩维,等.材料工程,2011(11),62. 10 Song P W, Jing X T, Guo X F. The Chinese Journal of Nonferrous Me-tals,2007,17(1),111(in Chinese). 宋佩维,井晓天,郭学锋.中国有色金属学报,2007,17(1),111. 11 He R, Yan H. Special Casting & Nonferrous Alloys,2012,32(7),657(in Chinese). 贺儒,闫洪.特种铸造及有色合金,2012,32(7),657. 12 Yang Y S, Fu J W, Luo T J, et al. The Chinese Journal of Nonferrous Metals,2011,21(10),2639(in Chinese). 杨院生,付俊伟,罗天骄,等.中国有色金属学报,2011,21(10),2639. 13 Wang B, Yang Y S, Zhou J X, et al. Rare Metal Materials and Enginee-ring,2009,38(3),519(in Chinese). 汪彬,杨院生,周吉学,等.稀有金属材料与工程,2009,38(3),519. 14 Li Y J, Yang Y. Transactions of Nonferrous Metals Society of China,2011,21(6),1277. 15 Fan Jinhui,Zhai Qijie. Transactions of Nonferrous Metals Society of China,2002,12(S1),11(in Chinese). 范金辉,翟启杰.中国有色金属学报,2002,12(S1),11. 16 He Y L, Yang Y S, Hu Z Q. Materials Review,2000,14(7),3(in Chinese). 贺幼良,杨院生,胡壮麒.材料导报,2000,14(7),3. 17 Hua J S, Zhang Y J, Wang E G, et al. Journal of Northeastern University(Natural Science),2011,32(1),72(in Chinese). 华骏山,张永杰,王恩刚,等.东北大学学报(自然科学版),2011,32(1),72. 18 Xiong W, Qin X Y, Wang L. Materials Review,2005,19(6),4(in Chinese). 熊伟,秦晓英,王莉.材料导报,2005,19(6),4. 19 Guo L P, Yin J, Chen L P, et al. Special Casting & Nonferrous Alloys,2013,33(5),480(in Chinese). 郭连平,尹健,陈乐平,等.特种铸造及有色合金,2013,33(5),480.
渝公网安备50019002502923号 版权所有：《材料导报》编辑部
2019, Vol. 33 
