The coupled solute drag effect during ferrite growth in Fe-C-Mn-Si alloys using controlled decarburization

被引：44
作者：
Qiu, C. [1 ]
Zurob, H. S. [2 ]
Hutchinson, C. R. [1 ]
机构：
[1] Monash Univ, Dept Mat Sci & Engn, Clayton, Vic 3800, Australia
[2] McMaster Univ, Dept Mat Sci & Engn, Hamilton, ON, Canada
来源：
ACTA MATERIALIA | 2015年 / 100卷
基金：
加拿大自然科学与工程研究理事会; 澳大利亚研究理事会;
关键词：
Ferrite growth; Coupled solute drag effect (CSDE); Free energy dissipation; Steels; LOW-CARBON STEELS; PROEUTECTOID FERRITE; X ALLOYS; GRAIN-BOUNDARIES; DIFFUSIONAL FORMATION; MIGRATING INTERFACES; AUSTENITE; TRANSFORMATION; SEGREGATION; KINETICS;
D O I：
10.1016/j.actamat.2015.08.065
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The kinetics of ferrite growth in three Fe-C-Mn-Si quaternary alloys has been measured using controlled decarburization tests at four temperatures between 755 degrees C and 825 degrees C, and a critical, quantitative test of the existence of a coupled solute drag effect (CSDE) is performed. The Mn and Si binding energies and trans-interface diffusivities (critical inputs in solute drag modelling) are taken directly from analogous experiments recently reported for ternary Fe-C-Mn and Fe-C-Si systems. The net solute drag effect experimentally observed in the quaternary system is found to be significantly less than that predicted by modelling using binding energies and trans-interface diffusivities calibrated on the respective ternary systems, i.e. an anti-CSDE is observed. This surprising observation is discussed in the context of solute interactions within the migrating interface and a number of future directions requiring investigation are highlighted. (C) 2015 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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收藏
页码：333 / 343
页数：11
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