金属学报  1998, Vol. 34 Issue (7): 678-688

论文 本期目录 | 过刊浏览 |

任意固相反扩散条件下枝晶凝固溶质传输微观/宏观模型化

徐达鸣;张成军;司广琚

哈尔滨工业大学材料科学与工程学院;哈尔滨;150001;佳木斯大学工学院;佳木斯;154007;哈尔滨工业大学材料科学与工程学院;哈尔滨;150001

MICRO-/MACRO-SCOPIC MODELING OF SOLUTAL MASS TRANSPORT IN DENDRITE SOLIDIFICAfION WITH PARTIAL SOLID BACK DIFFUSION

XU Daming ; ZHANG Chengjun ; SI Guangju (School of Materials Science and Engineering; Harbin Institute of Technology; Harbin 150001)(Engineering College; Jiamusi University; Jiamusi 154007)

徐达鸣;张成军;司广琚. 任意固相反扩散条件下枝晶凝固溶质传输微观/宏观模型化[J]. 金属学报, 1998, 34(7): 678-688.
, , . MICRO-/MACRO-SCOPIC MODELING OF SOLUTAL MASS TRANSPORT IN DENDRITE SOLIDIFICAfION WITH PARTIAL SOLID BACK DIFFUSION[J]. Acta Metall Sin, 1998, 34(7): 678-688.

摘要 参考文献 相关文章 Metrics 全文: PDF(1019 KB)   摘要: 通过对合金枝晶凝固中有任意固相反扩散条件下微观溶质再分布的模型化，扩展了作者提出的合金凝固传输及宏观偏析连续介质模型本文微观／宏观统一模型提出的归一化固相反扩散集合参数除了包括合金的团相扩散系数外，还包含了生长枝晶尺度及几何形态参数、凝固速率和溶质分配系数等影响因素模型的数值计算结果表明，在相同的凝固条件下不同的合金固相扩散能力可对其铸锭的宏观偏析行为产生明显的影响 关键词 ： 枝晶凝固,  固相反扩散,  宏观偏析,  数学模型，Al—Cu合金     Abstract：The continuum model proposed by the present authors for macroscopic solidification transport phenomena and macrosegregation formation was extended to account for the effect of any incomplete solid back diffusion through a microscopic dendrite solidification model. A generalized coefficient for the solid back diffusion was proposed by the present microscopic/macroscopic model, which includes the growing dendrite dimension, the parameters for the dendrite geometry, the solidification rate and partition coefficient etc besides the solid diffusivity.Numerical simulation of macrosegregations in a horizontal directionally soliditied A1-4.4Cu ingot with assumed different solid diffusivities of the copper solute was performed using the extended continuum model. The computation results show that the variation of the solid back diffusion can evidently influence the macrocomposition distribution in the soliditied ingot, and the greater the solid solute diffusivity, the lighter the macrosegregation seventy. Key words： dendrite solidification    solid back diffusion    macrosegregation    mathematical model    A1-Cu alloy 收稿日期: 1998-07-18      基金资助:哈尔滨工业大学金属精密热加工国家重点实验室基金!97JS61.1.1.ZS6101 服务 把本文推荐给朋友 加入引用管理器 E-mail Alert RSS 作者相关文章 徐达鸣 张成军 司广琚 44.8K 链接本文: https://www.ams.org.cn/CN/      或      https://www.ams.org.cn/CN/Y1998/V34/I7/678 1 Bennon W D, Incropera F P. Int J Heat Mass Transfer 1987; 30: 2161, 2171 2 Prescott P J, Incropera F P, Bennon W D. Int J Heat Maas Transfer, 1991; 34: 2351 3 Voller V R, Prakash C. Int J Heat Mass Transfer 1987; 30: 1709 4 Beckermann C. Viskanta R. Phys Chem Hydrodyn. 1988: 10: 195 5徐达鸣,李庆春,安阁英铸造,1997;(4):44 (Xu Damin., Li Qingchun, An Geying Foundry, 1997(4): 44) 6 Diao Q Z, Tsai H L. Metall Trans, 1993; 24A: 963 7顾江平清华大学博士学位论文,1995(Gu Jiangping.PhD Thesis,Tsinghua University,1995) 8 Rappaz M, Voller V. Metall Trans, 1990; 21A: 749 9 Schneider M C, Beckermann C. Int J Heat Mass Transfer, 1995; 38: 3455 10徐达鸣.哈尔滨工业大学博士学位论文,1989(Xu Daming、PhD Thesis,Harbin Institute of Technology,,1989) 11 Xu Daming, Li Qingchun. Numer Heat Transfer, 1991; 20A: 181; 203 12 Shahani H, Amberg G, Fredriksson H. Metall Trans, 1992; 23A: 2301 13陈卫德.大连理工大学博士学位论文,1994(Chen Weide.PhD Thesis,Dalian University of Science and Engineering,1994) 14徐达鸣,李庆春.金属学报,1990;26:B267(Xu Daming, Li Qingchun. Acta Metall Sin, 1990; 26: B267) 15 Gray W G. Chem Egg Sci, 1975; 30: 229 16 Ni J, Beckermann C. Metall Trans, 1991; 22B: 349 17 Flemings M C, Nereo G E. Trans Metall Soc AIME, 1967; 239: 1449 18 1980; (1): 6(Balangin G F. Cast Product, 1980; (1): 6) 19 Geiger G H, Poirier D R. Transport Phenomena in Metallurgy. Reading, Mass: Addison-Wesley, 1973:20司广琚.哈尔滨工业大学硕士学位论文,1996(Si Guangju.Master Thesis,Harbin Institute of Technology,1996) 21 Bower T F, Brody H D, Flemings M C. Trans Metall Soc AIME, 1966; 236: 624 22 Xu Daming, Si Guanaiu. In: Proc 3rd Pacific Rim Int Conf on Modeling of Casting and SolidificationPriestes 1996, Beijing: International Academic Publishers, 1996: 228 [1] 张利民, 李宁, 朱龙飞, 殷鹏飞, 王建元, 吴宏景. 交流电脉冲对过共晶Al-Si合金中初生Si相偏析的作用机制[J]. 金属学报, 2023, 59(12): 1624-1632. [2] 冯苗苗, 张红伟, 邵景霞, 李铁, 雷洪, 王强. 耦合热力学相变路径预测Fe-C包晶合金宏观偏析[J]. 金属学报, 2021, 57(8): 1057-1072. [3] 吴春雷,李德伟,朱晓伟,王强. 电磁旋流水口连铸技术对小方坯凝固组织形貌和宏观偏析的影响[J]. 金属学报, 2019, 55(7): 875-884. [4] 李军, 夏明许, 胡侨丹, 李建国. 大型铸锭均质化问题及其新解[J]. 金属学报, 2018, 54(5): 773-788. [5] 沈厚发, 陈康欣, 柳百成. 钢锭铸造过程宏观偏析数值模拟[J]. 金属学报, 2018, 54(2): 151-160. [6] 李军, 王军格, 任凤丽, 葛鸿浩, 胡侨丹, 夏明许, 李建国. 基于成分均匀化的层状铸造方法的实验与模拟研究[J]. 金属学报, 2018, 54(1): 118-128. [7] 李军,葛鸿浩,GE Honghao,WU Menghuai,李建国. 基于热溶质对流及晶粒运动的柱状晶-非球状等轴晶混合三相模型*[J]. 金属学报, 2016, 52(9): 1096-1104. [8] 赵海东; 吴朝忠; 李元元; 大中逸雄 . 垂直向上凝固Al-Cu铸件中微观孔洞形成的数值模拟[J]. 金属学报, 2008, 44(11): 1340-1347 . [9] 王同敏; 李廷举; 曹志强; 金俊泽; T.Grimmig; A.Buhrig-Polaczek; M.Wu; A.Ludwig . 等轴球晶凝固多相体系内热溶质对流、补缩流及晶粒运动的数值建模 II．模型的应用[J]. 金属学报, 2006, 42(6): 591-598 . [10] 李中原; 赵九洲 . 平行板型薄板坯连铸结晶器中钢液流动、凝固及溶质分布的三维耦合数值模拟[J]. 金属学报, 2006, 42(2): 211-217 . [11] 郭大勇; 杨院生; 童文辉; 胡壮麒 . 电磁离心凝固过程中宏观偏析的数值模拟[J]. 金属学报, 2004, 40(3): 275-280 . [12] 郭大勇; 杨院生; 童文辉; 胡壮麒 . 电磁离心凝固过程中宏观偏析的数值模拟[J]. 金属学报, 2004, 40(3): 275-280 . [13] 张勤; 崔建忠 . 7075铝合金CREM法半连铸坯中溶质元素的的宏观分布[J]. 金属学报, 2003, 39(12): 1264-1268 . [14] 沈厚发; C.Beckermann . 糊状区变形及浓度再分布的模拟实验[J]. 金属学报, 2002, 38(4): 352-358 . [15] 张红伟; 王恩刚 . 方坯连铸过程中钢液流动、凝固及溶质分布的耦合数值模拟[J]. 金属学报, 2002, 38(1): 99-104 . Viewed Full text Abstract Cited   Shared      Discussed