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Phase-field simulation of dendritic growth for binary alloys with complicate solution models LI Xin-zhong(李新中), GUO Jing-jie(郭景杰), SU Yan-qing(苏彦庆), WU Shi-ping(吴士平), FU Heng-zhi(傅恒志) (School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 15001, China) Abstract: A phase-field method for simulation of dendritic growth in binary alloys with complicate solution......
Numerical simulation for isothermal dendritic growth of succinonitrile-acetone alloy CHEN Zhi(陈 志)1, CHEN Chang-le(陈长乐)1, HAO Li-mei(郝丽梅)2 1. School of Science, Shaanxi Key Laboratory... and the side branches of crystals appear and grow gradually. Key words: phase field method; succinonitrile-acetone alloy; dendritic growth; tip velocity; anti-trapping current; anisotropy  ......
the self-assembly of nanoparticles under the entropy-driven force. 3D dendritic needle-like nanocrystals are prepared through an aqueous solution synthesis regulated by oleic acid molecules. Their growth...) of inorganic materials are particularly attractive since the first report on the dendritic growth by NITTMANN and STANLEY in 1986[16]. This is because fractals are not only theoretically interesting......
Trans. Nonferrous Met. Soc. China 22(2012) 2212-2219 Modeling of equiaxed and columnar dendritic growth of magnesium alloy WU Meng-wu1, 2, XIONG Shou-mei1, 2 1. Department of Mechanical Engineering... Abstract: Based on the cellular automaton (CA) method, a numerical model was developed to simulate the dendritic growth of magnesium alloy with HCP crystal structure. The growth kinetics was calculated......
Engineering, Tsinghua University, Beijing 100084, China) Abstract: The influence of undercooling and noise magnitude on dendritic sidebranching during crystal growth was investigated by simulation of a phase..., dendritic sidebranching during crystal growth is investigated by simulation of a phase-field model which incorporates thermal noise of microscopic origin. Some key problems in modeling and numerical......
=117μm1.27·s-0.27 and the primary dendritic arm spacing (λ) with the growth rate has a relation of λv0.208=153.8μm1.208·s-0.208 as the growth rate increases from 3 to 300μm/s. Key words: Cu-75%Sn alloy... will appear. Fig.2 Directionally solidified microstructures of Cu-75%Sn alloy in transverse section at various growth rates 3.3 Sizes of ε phase and η phase as well as primary dendritic arm......
Dendritic Growth Pattern and Dendritic Network Distortion in the Platform of a Ni-based SuperalloyXiaoli Zhang,Yizhou Zhou,Yanyun Han,Tao Jin,Xiaofeng SunInstitute of Metal Research, Chinese Academy of Sciences摘 要:The pattern of dendritic growth and distortion of dendritic network in the platform have been investigated by one mold casting with different......
agreement with the experimental data.Key words:modified cellular automaton; preferred growth direction; dendritic growth; numerical simulation...,从而能够模拟择优生长取向与坐标轴成不同夹角的枝晶生长形貌演变.为验证模型的可靠性,模拟NH4Cl-H2O系透明合金单个等轴枝晶以及不同择优生长取向角的多个等轴枝晶和柱状枝晶的形貌演化,模拟结果与实验结果吻合较好.关键词:改进的元胞自动机;择优生长取向;枝晶生长;数值模拟Numerical simulation of dendrite growth with different preferred......
的影响.当过冷度大于210 K后,熔体熔度指数型增大,原子扩散速度显著降低,从而引起实际枝晶生长速度的增长趋势减缓,而极限碰撞模型忽略了黏度的影响,因此二者偏离程度越来越大. 图4 深过冷液态Zr中的快速枝晶生长过程 Fig. 4 Rapid dendritic growth of substantially undercooled liquid Zr 表1 ...并致谢. REFERENCES [1] AKAMATSU S, BOTTIN-ROUSSEAU S, FAIVRE G, BRENER E A. Scaling theory of two-phase dendritic growth in undercooled ternary melts[J]. Physical Review Letters, 2014, 112(10): 105502......
Phase-field simulations of forced flow effect on dendritic growth perpendicular to flow WANG Zhi-ping1, 2, WANG Jun-wei1, ZHU Chang-sheng1, 3, FENG Li1, XIAO Rong-zhen1 1. State Key... melt forced laminar flow at low Reynolds Number on dendritic growth perpendicular to melt flow direction was investigated with the phase-field method by incorporating melt convection and thermal noise......