Diffusivities of an Al-Fe-Ni melt and their effects on the microstructure during solidification

被引：85

作者：

Zhang, Lijun ^{[1
,2
]}

Du, Yong ^{[1
]}

Steinbach, Ingo ^{[2
]}

Chen, Qing ^{[3
]}

Huang, Baiyun ^{[1
]}

机构：

[1] Cent S Univ, State Key Lab Powder Met, Changsha 410083, Hunan, Peoples R China

[2] Ruhr Univ Bochum, Interdisciplinary Ctr Adv Mat Simulat, D-44801 Bochum, Germany

[3] Thermocalc Software AB, S-11347 Stockholm, Sweden

来源：

ACTA MATERIALIA | 2010年 / 58卷 / 10期

基金：

中国国家自然科学基金;

关键词：

Al-Fe-Ni melt; Diffusion; Atomic mobility; Microstructure; Solidification; SELF-DIFFUSION COEFFICIENT; LIQUID-METALS; TRANSPORT-PROPERTIES; ATOMIC DIFFUSION; SIMULATION; ALUMINUM; SYSTEM; PHASE; CR; EQUILIBRIUM;

D O I：

10.1016/j.actamat.2010.03.002

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A systematical investigation of the diffusivities in an Al-Fe-Ni melt was presented. Based on the experimental and theoretical data about diffusivities, the temperature- and composition-dependent atomic mobilities were evaluated for the elements in Al-Ni, Al-Fe, Fe-Ni and Al-Fe-Ni melts via an effective approach. Most of the reported diffusivities can be reproduced well by the obtained atomic mobilities. In particular, for the first time the ternary diffusivity of the liquid in a ternary system is described in conjunction with the established atomic mobilities. The effect of the atomic mobilities in a liquid on microstructure and microsegregation during solidification was demonstrated with one Al-Ni binary alloy. The simulation results indicate that accurate databases of mobilities in the liquid phase are much needed for the quantitative simulation of microstructural evolution during solidification by using various approaches, including DIC-TRA and the phase-field method. (C) 2010 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：3664 / 3675

页数：12

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