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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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定向凝固发散双晶的竞争生长研究
DOI: 10.3724/SP.J.1037.2012.00569, PP. 58-62
Keywords: 定向凝固,双晶,竞争生长,发散
Abstract:
采用SCN--1.7%Eth(质量分数)透明模型合金,应用自制的晶粒择优取向角度可控的透明模型合金双籽晶试样盒,对定向凝固中双晶竞争生长的微观组织演化进行了实时观察,研究了二维条件下,抽拉速率和晶粒取向对发散晶粒竞争淘汰的影响.结果表明,对于发散双晶,随抽拉速率的提高,择优取向晶粒淘汰非择优取向晶粒的速度变慢,其主要原因在于,抽拉速率增大会减小一次枝晶间距并降低择优取向晶粒一次臂新增频率;当择优取向晶粒优先生长方向与热流方向不完全一致时,在特定抽拉速率下,择优取向晶粒由于受到型壁的制约,最终亦可能被淘汰.
| [1] | Zhou Y Z, Volek A, Green N.Acta Mater, 2008; 56: 2631
|
| [2] | Zhou Y Z, Jin T, Sun X F.Acta Metall Sin, 2010; 46: 1327(周亦胄, 金涛, 孙晓峰. 金属学报, 2010; 46: 1327)
|
| [3] | Li J J, Wang Z J, Wang Y Q, Wang J C.Acta Mater, 2012; 60: 1478
|
| [4] | Hunt J D, Jackson K A, Brown H.Rev Sci Instrum, 1966; 37: 805
|
| [5] | Lu S Z, Hunt J D.J Cryst Growth, 1992; 123: 17
|
| [6] | Ding G L, Huang W D, Huang X, Lin X, Zhou Y H.Acta Mater, 1996; 44: 3705
|
| [7] | Huang W D, Geng X G, Zhou Y H.J Cryst Growth, 1993; 134: 105
|
| [8] | Hunt J D, Lu S Z.Metall Mater Trans, 1996; 27A: 611
|
| [9] | Harris K, Erickson G L, Schwer R E.Metals Handbook. 10th Ed., Vol.1, Ohio: ASM International, 1990; 995
|
| [10] | Stanford N, Djakovic A, Shollock B A, McLean M, D'Souza N, Jennings P A.Scr Mater, 2004; 50: 159
|
| [11] | Walton D, Chalmers B.Trans Metall Soc AIME, 1959; 215: 447
|
| [12] | Gandin C A, Rappaz M.Acta Metall Mater, 1994; 42: 2233
|
| [13] | Rappaz M, Gandin C A, Desbiolles J L, Thevoz P.Metall Mater Trans, 1996; 27A: 695
|
| [14] | Esaka H.PhD Thesis, Switzerland: Ecole Polytechnique, Federale de Lausanne, 1986
|
| [15] | D'Souza N, Ardakani M G, Wagner A, Shollock B A, Mclean M J.Mater Sci, 2002; 37: 481
|
| [16] | Zhu M F, Hong C P.ISIJ Int, 2001; 41: 436
|
| [17] | Dong H B, Lee P D.Acta Mater, 2005; 53: 659
|
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