采用Tong和Beckermann等提出的耦合流场相场模型对纯镍凝固中多晶粒枝晶的生长过程进行模拟,研究了多晶粒枝晶的生长形貌和温度分布.结果表明,熔体流动显著改变凝固前沿的传热,从而影响枝晶生长.受熔体流动和多晶粒之间相互影响的共同作用,枝晶在4个最优生长方向上的形貌呈现不对称;熔体流动还改变了枝晶的水平最优生长方向,使得水平主枝向上游倾斜;此外,二次枝晶出现径向熔化和轴向熔化等粗化方式.
参考文献
| [1] | 胡汉起.金属凝固原理[M].北京:机械工业出版社,1999:206. |
| [2] | 朱昌盛,王智平,荆涛,柳百成.对流影响枝晶生长的相场法模拟研究进展[J].材料导报,2004(12):26-28,33. |
| [3] | 梁晋洁,陈长乐,刘静.凝固过程中对流效应的相场模拟研究进展[J].材料导报,2006(01):23-25. |
| [4] | Kobayashi R .Modeling and numerical simulations of dendritic crystal growth[J].Physical Review D,1993,63(3-4):410. |
| [5] | J. A. WARREN;W. J. BOETTINGER .PREDICTION OF DENDRITIC GROWTH AND MICROSEGREGATION PATTERNS IN A BINARY ALLOY USING THE PHASE-FIELD METHOD[J].Acta Metallurgica et Materialia,1995(2):689-703. |
| [6] | Suzuki T.;Ode M.;Kim SG.;Kim WT. .Phase-field model of dendritic growth[J].Journal of Crystal Growth,2002(Pt.1):125-131. |
| [7] | H.-J. DIEPERS;C. BECKERMANN;I. STEINBACH .SIMULATION OF CONVECTION AND RIPENING IN A BINARY ALLOY MUSH USING THE PHASE-FIELD METHOD[J].Acta materialia,1999(13):3663-3678. |
| [8] | Tong X.;Karma A.;Beckermann C. .Velocity and shape selection of dendritic crystals in a forced flow[J].Physical review.E.Statistical physics, plasmas, fluids, and related interdisciplinary topics,2000(1):R49-R52. |
| [9] | Tonhardt R.;Amberg G. .Phase-field simulation of dendritic growth in a shear flow[J].Journal of Crystal Growth,1998(3/4):406-425. |
| [10] | Jeong JH.;Dantzig JA.;Goldenfeld N. .Phase field model for three-dimensional dendritic growth with fluid flow - art. no. 041602[J].Physical review.E.Statistical physics, plasmas, fluids, and related interdisciplinary topics,2001(4 Pt.1):1602-0. |
| [11] | 陈玉娟,陈长乐.相场法模拟对流速度对上游枝晶生长的影响[J].物理学报,2008(07):4585-4589. |
| [12] | 陈志,陈长乐,郝丽梅.相场参数对强制流动下枝晶生长影响的模拟研究[J].稀有金属材料与工程,2009(07):1209-1213. |
| [13] | Z. Chen,C.L. Chen,L.M. Hao.NUMERICAL SIMULATION OF SUCCINONITRITE DENDRITIC GROWTH IN A FORCED FLOW[J].金属学报（英文版）,2008(06):444-450. |
| [14] | 袁训锋,丁雨田,郭廷彪,胡勇,唐向前.对流作用下枝晶生长行为的相场法[J].中国有色金属学报,2010(04):681-687. |
| [15] | 龙文元,吕冬兰,夏春,潘美满,蔡启舟,陈立亮.强迫对流影响二元合金非等温凝固枝晶生长的相场法模拟[J].物理学报,2009(11):7802-7808. |
| [16] | Zhu Changsheng,Wang Zhiping,Gui Jin,Xiao Rongzhen.Convection effect on dendritic growth using phase-field method[J].中国铸造,2010(01):52-56. |
| [17] | Karma A;Rappel W J .Phase-field method for computionally efficient modeling of solidification with arbitrary interface kinetics[J].Physical Review E,1996,53(04):3017. |
| [18] | 陈云,康秀红,李殿中.自由枝晶生长相场模型的自适应有限元法模拟[J].物理学报,2009(01):390-398. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%