金属学报  2005, Vol. 41 Issue (7): 695-702

论文 本期目录 | 过刊浏览 |

相场法预测低铝合金Ni75AlxV25-x的早期沉淀过程

侯 华 赵宇宏 陈 铮 徐 宏

中北大学材料科学与工程学院; 太原 030051

Prediction for the Early Precipitation Process of Ni75AlxV25-X System with Lower Al Concentration by the Phase-Field Model

HOU Hua; ZHAO Yuhong; CHEN Zheng; XU Hong

Department of Materials Science & Engineering; North China Institute of Technology; Taiyuan 030051

侯华; 赵宇宏; 陈铮; 徐宏 . 相场法预测低铝合金Ni75AlxV25-x的早期沉淀过程[J]. 金属学报, 2005, 41(7): 695-702 .
, , , . Prediction for the Early Precipitation Process of Ni75AlxV25-X System with Lower Al Concentration by the Phase-Field Model[J]. Acta Metall Sin, 2005, 41(7): 695-702 .

摘要 参考文献 相关文章 Metrics 全文: PDF(534 KB)   摘要: 采用微观相场模型, 通过分析原子图像、有序相内序参数分布及有序相体积分数随时间的变化，在原子尺度对低Al浓度Ni75AlxV25-x合金的早期沉淀动力学进行了计算机预测。研究发现该合金沉淀过程中, 析出D022结构的(Ni3V)相和L12结构的Ni3Al相, 二者构成伪二元系；相先于相析出, 相的沉淀机制为等成分有序化+失稳分解, 相在相的相界处非经典形核，二者均先形成非化学计量比有序相,之后向化学计量比有序相转变；随Al浓度增加，相析出变慢, 所占比例减少, 而相反之, 析出越来越早且所占比例增加。 关键词 ： 微观相场法,  计算机模拟,  Ni75AlxV25-x合金     Abstract：The microscopic phase--field approach was used in modeling the early precipitation process of Ni75AlxV25-x alloy with lower Al concentration on an atomic scale through the simulation of atomic pictures, calculation of order parameter profiles and change of volume fraction of the ordered phases. The results show that ordered phases precipitated and formed a pseudobinary system; precipitated earlier than g phase by a congruent ordering + spinodal decomposition (CO+SD) mechanism and thus produced a nonstoicheometric ordered phase, then the nonstoicheometric g phase precipitated by a non--classical nucleation and growth (NCNG) mechanism at the boundaries of phases, meanwhile, both of them transformed to stoicheometric ordered phases. With the increase of Al composition, the congruent ordering process of phase becomes more slow, and g phase precipitation becomes earlier, the occupation percentage of gincreased and that of phase decreased. Key words： microscopic phase--field approach    computer simulation 收稿日期: 2004-08-30      ZTFLH:  TG146.2   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 侯华 赵宇宏 陈铮 徐宏 44.8K 链接本文: https://www.ams.org.cn/CN/      或      https://www.ams.org.cn/CN/Y2005/V41/I7/695 [1] Chen L Q, Vaith Y V, Liu Z K. www.mrs.org/publications/ bulletin. 2001; March: 197 [2] Chen L Q, Khachaturyan A G. Acta Metall Mater, 1991; 39: 2533 [3] Chen L Q, Khachaturyan A G. Scr Met Mater, 1991; 25: 61 [4] Koyama T, Miyazaki T, Mebed M. Metall Mater Trans, 1995; 26A: 2617 [5] Miyazaki T, CALPHAD, 2001; 25: 231 [6] Rubin G, Khachaturyan A G. Acta Mater, 1999; 47: 1995 [7] Pareige C, Blavette D. Scr Mater, 2001; 44: 243 [8] Poduri R. Acta Mater, 1998; 46:1719 [9] Chen L Q. Acta Metall Mater, 1994; 42: 3503 [10] Zhao Y H. PhD Thesis, Northwestern Polytechnical University, Xi'an, 2003 (赵宇宏．西北工业大学博士学位论文,西安, 2003) [11] Chen L Q, Simmons J A. Acta Metal Mater, 1994; 42: 2943 [12] Dai J Y, Zhang J H, Jin Z X, Li D X, Ye H Q. Acta Metall Sin, 1994; 30: Al (戴吉岩,张静华,金志雄,李斗星,叶恒强．金属学报,1994; 30:A1) [13] Cahn R W, Haasen P, Kramer E J. Plastic Deforrmation and Fracture of Materials . Beijing: Science Press, 1998: 227 (Cahn R W,Haasen P,Kramer E J．材料的塑性变形与断 裂．北京:科学出版社, 1998:227) [14] Zapolsky H, Pareige C, Marteau L, Blavette D. CALPHAD, 2001; 25: 125 [15] Bendersky L A, Biancaniello F S, Williams M E. SolidSolid Phase Transformations. Warrendale, PA: TMS, 1994: 899 [16] Chen L Q. Annu Rev Mater Res, 2002, 32: 113 [17] Vaithyanathan V, Wolverton C, Chen L Q. Phys Rev Lett, 2002; 88: 125503-1-4 [18] Poduri R, Chen L Q. Acta Mater, 1996; 44: 4253. [19] Feng D . Physics of Metal. Beijing: Science Press, 1998: 128 (冯端．金属物理学．北京:科学出版社, 1998:128)M [1] 苗树芳 陈铮 王永欣 徐聪 马锐 张明义. L10相和L12相结构原位转变的微观相场法模拟[J]. 金属学报, 2009, 45(5): 630-634. [2] 张林; 徐送宁; 张彩碚; 祁阳 . 熔融Cu55团簇在冷却过程中结构变化的分子动力学模拟[J]. 金属学报, 2008, 44(10): 1161-1166 . [3] 郑洲顺; 曲选辉; 雷长明 . PIM充模流动过程中粘度的变化与缺陷形成[J]. 金属学报, 2007, 43(2): 183-193 . [4] 张林; 张彩碚; 王元明 . 连续冷却过程中低碳钢奥氏体→铁素体相变的元胞自动机模拟[J]. 金属学报, 2004, 40(1): 8-13 . [5] 李晨曦; 隋智通; 李玉海 . 高Ti炉渣中Ca-Ti矿相析出过程的计算机模拟[J]. 金属学报, 2001, 37(7): 763-766 . [6] 李殿中; 张玉妥; 刘实; 李依依 . 材料制备工艺的计算机模拟[J]. 金属学报, 2001, 37(5): 449-452 . [7] 鲁世强; 罗子健; 王仁卉; 曾凡昌 . 合成电子衍射花样的计算机模拟及应用[J]. 金属学报, 1999, 35(5): 554-560 . [8] 王明章; 李小燕; 林实; 王中光; 肖纪美 . 计算机模拟晶界位向对双晶体循环形变行为的影响[J]. 金属学报, 1999, 35(1): 27-31 . [9] 初业隆;熊良钺;孙校开. 纳米复合磁体磁化过程的计算机研究[J]. 金属学报, 1998, 34(4): 423-430. [10] 隋智通;张培新. 硼渣中硼组分选择性析出行为[J]. 金属学报, 1997, 33(9): 943-951. [11] 戎咏华;王永瑞;王纪文;陈行康;胡赓祥. 20钢奥氏体氮碳共渗后淬火态与时效态的化合物层[J]. 金属学报, 1996, 32(5): 462-468. [12] 尹爱君;李晶;李新海;黄克雄;蒋汉瀛. 铜闪速熔炼中微量元素行为的计算机模拟[J]. 金属学报, 1996, 32(4): 387-392. [13] 陈达. 纳米微晶材料的扩散机制[J]. 金属学报, 1995, 31(8): 340-345. [14] 徐驰;苏航;陈念贻;李洁;唐定骧. DyF_3-BaF_2-LiF三元系熔体结构的计算机模拟研究[J]. 金属学报, 1995, 31(15): 97-102. [15] 蔡珣;周平南. 显微硬度实验的计算机模拟[J]. 金属学报, 1995, 31(13): 44-5. Viewed Full text Abstract Cited   Shared      Discussed