Numerical solution to T-φ_S-C_L coupling in binary dendrite solidification with any solid-back diffusion effects  

作　　者：徐达鸣 郭景杰 傅恒志 苏彦庆 李庆春 

机构地区：[1]School of Materials Science and Engineering Harbin Institute of Technology, Harbin 150001,China

出　　处：《中国有色金属学会会刊：英文版》2003年第5期1149-1154,共6页Transactions of Nonferrous Metals Society of China

基　　金：Project(G2 0 0 0 0 672 022)supportedbytheNationalKeyFundamentalResearchandDevelopmentProgramofChina

摘　　要：A previous numerical solution method to the strong nonlinear T φ S C L coupling for a Scheil type binary solidification process was extended and modified for single phase dendrite solidifications of any nominal alloy composition(in a composition range of single phase or eutectic solidification) and with any solid back diffusion extents. Numerical sample computations were performed on Al Cu system with different nominal compositions from almost pure Al to nearly eutectic and with different solid diffusion coefficients, which are factitiously enlarged or decreased in eight orders of magnitude. The calculation results exhibit the feasibility, capability and efficiency of the proposed numerical scheme in modeling an arbitrary binary dendrite solidification problem.A previous numerical solution method to the strong nonlinear T φ S C L coupling for a Scheil type binary solidification process was extended and modified for single phase dendrite solidifications of any nominal alloy composition(in a composition range of single phase or eutectic solidification) and with any solid back diffusion extents. Numerical sample computations were performed on Al Cu system with different nominal compositions from almost pure Al to nearly eutectic and with different solid diffusion coefficients, which are factitiously enlarged or decreased in eight orders of magnitude. The calculation results exhibit the feasibility, capability and efficiency of the proposed numerical scheme in modeling an arbitrary binary dendrite solidification problem.

关 键 词：铝凝固 联结传输 数字模型 固态扩散 

分 类 号：TG111[金属学及工艺—物理冶金]