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金属学报  2006 

搅拌条件下二元合金凝固组织的形态演化

, PP. 577-583

Keywords: 对流,晶体生长,半固态加工

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Abstract:

采用SCN-5%Water(原子分数)透明模型合金和Sn-15%Pb(质量分数)合金对机械搅拌条件下凝固组织形态演化过程分别进行了实时动态观察和淬火金相组织分析.实验结果表明,在强烈机械搅拌作用下,两类实验合金在凝固过程中最早观察到的初生组织均为球晶组织.从实验上证实了通过适当的搅拌可直接获得球状晶组织;同时,在实验条件范围内,搅拌的进行还可促进球晶组织在相对较高温度下产生.根据凝固界面形态稳定性理论对球晶组织形成机制的分析表明熔体中初生固相的旋转运动有利于提高液--固界面的稳定性,促进凝固组织保持球状稳定生长.

 References

[1]  Flemings M C. Metall Trans, 1991; 22B: 269
[2]  Doherty R D, Lee H-I, Feest E A. Mater Sci Eng, 1984; 65: 181
[3]  Hellawell A. In: Kirkwood D H, Kapranos P, eds., Proc 4th Int Conf on Semi-Solid Processing of Alloys and Composites, Sheffield, UK: The University of Sheffield, 1996: 60
[4]  Mullis A M. Ada. Mater, 1999; 47: 1783
[5]  Molenaar J M M, Katgerman L, Kool W H, Smeulders R J. J Mater Sci, 1986; 21; 389
[6]  Li T, Huang W D, Lin X. Chin J Nonferrous Met, 2000; 10: 635 (李涛,黄卫东,林鑫．中国有色金属学报,2000;10:635)
[7]  Ji S, Fan Z, Bevis M J. Mater Sci Eng, 2001; A299: 210
[8]  Fan Z. Int Mater Rev, 2002; 47: 49
[9]  Niroumand B, Xia K. Mater Sci Eng, 2000; A283: 70
[10]  Mullins W W, Sekerka R F. J Appl Phys, 1963; 34: 323
[11]  Mullins W W, Sekerka RF. J Appl Phys, 1964; 35: 444
[12]  Coeniell S R, Hurle D T J, Sekerka R F. J Cryst Growth, 1976; 31: 1
[13]  Kotlen G R, Tiller W A. In: Peiser H S, ed., Crystal Growth, Oxford: Pergamon, 1967
[14]  Langer J S, Muller H-K. Ada. Metall, 1978; 26: 1681
[15]  Langer J S, Muller H-K. Ada Metall, 1978; 26: 1689
[16]  Muller H-K, Langer J S. Ada Metall, 1978; 26: 1697
[17]  Trivedi R. J Cryst Growth, 1980; 48: 93
[18]  Cantor B, Vogel A. J Cryst Growth, 1977; 41: 109
[19]  Vogel A, Cantor B. J Cryst Growth, 1977; 37: 309
[20]  Schulze T P, Davis S H. J Cryst Growth, 1995; 149: 253
[21]  Delves R T. 7 Cryst Growth, 1971; 8: 13
[22]  Coriell S R, McFadden G B, Boisvert R F, Sekerka R F. J Cryst Growth, 1984; 69: 15
[23]  Forth S A, Wheeler A A. J Fluid Mech, 1989; 202: 339
[24]  Hobbs A K, Metzener P. J Cryst Growth, 1991; 112: 539
[25]  Schulze T P, Davis S H. J Cryst Growth, 1994; 143: 317
[26]  Das A, Ji S, Fan Z. Ada Mater, 2002; 50: 4571
[27]  Vand V. J Phys Colloid Chem, 1948; 52: 277

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