Acta Metall Sin  2011, Vol. 47 Issue (3): 284-290    DOI: 10.3724/SP.J.1037.2010.00486

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CONVECTION EFFECTS AND BANDING STRUCTURE FORMATION MECHANISM DURING DIRECTIONAL SOLIDIFICATION OF PERITECTIC ALLOYS II. Theoretical Analysis

LUO Liangshun1,2, FU Hengzhi1, ZHANG Yumin2, LI Xinzhong 1, SU Yanqing 1, GUO Jingjie 1

1. School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001 2. National Key Laboratory of Science and Technology on Advanced Composites in Special Environment, Harbin Institute of Technology, Harbin 150001

LUO Liangshun FU Hengzhi ZHANG Yumin LI Xinzhong SU Yanqing GUO Jingjie. CONVECTION EFFECTS AND BANDING STRUCTURE FORMATION MECHANISM DURING DIRECTIONAL SOLIDIFICATION OF PERITECTIC ALLOYS
II. Theoretical Analysis. Acta Metall Sin, 2011, 47(3): 284-290.

Abstract References Related Articles Recommended Metrics Download:  PDF(2193KB)  Export:  BibTeX | EndNote (RIS)       Abstract  The axial macrosegregation and relevant microstructure evolution of Fe–Ni peritectic alloys directionally solidified under different convection strength were discussed using pure diffusion model, boundary layer convection model and the Scheil equation. Comparing with the experiments of Fe–Ni alloys conducted in resistance heating and induction heatinBridgman system, it was found that the predictions of boundary layer convection model areed well with the experimental results of induction heating drectional solidification when the convection strength parameters lies in the region 1.7<λ≤2, indicating that the model can be used to predict the axial macrosegregation and microstructures evolution of peritectic alloys. Key words:  peritectic alloys      directional solidification      convection      egregation      boundary layer convection model      Received:  19 September 2010      ZTFLH:  TG111.4   Fund:  Supported by National Natural Science Foundation of China (Nos.50901025 and 50771041) and National Science Foundation for Post–doctoral Scientists of China (No.20090450840) Service E-mail this article Add to citation manager E-mail Alert RSS （） Articles by authors LUO Liang-Shun FU Heng-Zhi ZHANG Yu-Min LI Xin-Zhong SU Pan-Qiang GUO Jing-Jie URL:  https://www.ams.org.cn/EN/10.3724/SP.J.1037.2010.00486     OR     https://www.ams.org.cn/EN/Y2011/V47/I3/284 [1] Kerr H W, Kurz W. Int Mater Rev, 1996; 41: 129 [2] Boettinger W J, Coriell S R, Greer A L, Karma A, Kurz W, Rappaz M, Trivedi R. Acta Mater, 2000; 48: 43 [3] Asta M, Beckermann C, Karma A, Kurz W, Napolitano R, Plapp M, Purdy G, Rappaz M, Trivedi R. Acta Mater, 2009; 57: 941 [4] Trivedi R, Shin J H. 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