Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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中国有色金属学报(英文版)

Transactions of Nonferrous Metals Society of China

Vol. 22    No. 1    January 2012

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Thermo-Calc and T−fS−CL coupling based method to determine solidification paths of alloys solidified under condition of Biot£0.1
Zhao Guang-wei1, LI Xin-zhong1, XU Da-ming1, GUO Jing-jie1, FU Heng-zhi1, DU Yong2, HE Yue-hui2

1. School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China
2. State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China

Abstract:A binary continuum model for dendritic solidification transport phenomena and corresponding numerical algorithm for the strong nonlinear coupling of T−fS−CL were extended to multicomponent alloys solidified under condition of Biot£0.1. Based on the extended model/algorithm, a method considering heat transfer was proposed to predict the solidification paths and microsegregation of alloys solidified under the same condition. The new algorithm and method were closely coupled with the commercial Thermo-Calc package via its TQ6-interface codes for instantaneous determination of the related thermodynamic data at each calculation time step. The sample simulation performed on an Al−2Si−3Mg alloy system indicates the availability and reliability of the model/algorithm and the proposed method for predicting solidification paths and microsegregation. Computional and experimental investigations on an Al−5.17Cu−2.63Si ternary alloy were conducted, and a reasonable agreement between the computation and experiment was obtained.

 

Key words: thermo-calc; solidification transport; solidification paths; microsegregation

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW

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