张冰,赵宇宏,王鸿,陈伟鹏,侯华.Al-Si合金枝晶形貌的三维相场模拟[J].稀有金属材料与工程,2019,48(9):2835~2840.[ZHANG Bing,ZHAO Yuhong,WANG Hong,CHEN Weipeng,HOU Hua.Three-dimensional phase field simulation of dendritic morphology of Al-Si alloy[J].Rare Metal Materials and Engineering,2019,48(9):2835~2840.]
Al-Si合金枝晶形貌的三维相场模拟
投稿时间:2018-03-07  修订日期:2018-05-20
中文关键词:  相场法  枝晶生长  三维自适应网格  界面宽度  热噪声
基金项目:国家自然科学基金(项目号51774254,51774253,51701187,U1610123,51674226,51574207,51574206), 山西省科技重大专项资助(项目号MC2016-06)资助
中文摘要:
      基于包含固相扩散系数的Karma薄界面相场模型,采用三维自适应网格划分法,研究了界面宽度、热噪声幅值对Al-Si合金过冷熔体中枝晶生长行为的影响。模拟结果表明:随着界面宽度的增加,枝晶形貌的复杂度下降,枝晶尖端速度下降,尖端液相处溶质的富集程度下降;随着热噪声幅值的增加,枝晶尖端变化较小,位于枝晶主干两侧的二次枝晶的数量和不对称度增加。
Three-dimensional phase field simulation of dendritic morphology of Al-Si alloy
英文关键词:Phase-field Method  Dendritic Growth  Three-dimensional Adaptive Grid  Interface Width  Thermal Noise
英文摘要:
      Based on the Karma thin interface phase-field model which include the solid diffusivity, the effects of interface width and thermal noise on the dendrite growth behavior in undercooled melt of Al-Si alloy were studied by using three-dimensional adaptive meshing method. The simulation results show that with the increase of interface width, the complexity of dendrite morphology decreases, the dendritic tip velocity decreases and the solute concentration at the tip liquid phase decreases. With the increase of thermal noise amplitude, the dendritic tip changes small, the number and asymmetry of secondary dendrites located on both sides of the dendrite increases.
作者单位E-mail
张冰 中北大学材料科学与工程学院 570084772@qq.com 
赵宇宏 中北大学材料科学与工程学院  
王鸿 中北大学材料科学与工程学院  
陈伟鹏 中北大学材料科学与工程学院  
侯华 中北大学材料科学与工程学院  
摘要点击次数: 31
全文下载次数: 402
查看全文  查看/发表评论  
关闭