Self-Consistent Model for Planar Ferrite Growth in Fe-C-X Alloys

被引：75

作者：

Zurob, H. S. ^{[1
]}

Panahi, D. ^{[1
]}

Hutchinson, C. R. ^{[2
]}

Brechet, Y. ^{[3
]}

Purdy, G. R. ^{[1
]}

机构：

[1] McMaster Univ, Dept Mat Sci & Engn, Hamilton, ON, Canada

[2] Monash Univ, Dept Mat Engn, Clayton, Vic 3800, Australia

[3] Inst Natl Polytech Grenoble, SIMAP, F-38402 Grenoble, France

来源：

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE | 2013年 / 44A卷 / 08期

基金：

澳大利亚研究理事会;

关键词：

SOLUTE DRAG; PROEUTECTOID FERRITE; MN; TRANSFORMATION; DECARBURIZATION; DIFFUSION; ELEMENTS; NI; EQUILIBRIUM; BOUNDARIES;

D O I：

10.1007/s11661-012-1479-8

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A self-consistent model for non-partitioning planar ferrite growth from alloyed austenite is presented. The model captures the evolution with time of interfacial contact conditions for substitutional and interstitial solutes. Substitutional element solute drag is evaluated in terms of the dissipation of free energy within the interface, and an estimate is provided for the rate of buildup of the alloying element "spike" in austenite. The transport of the alloying elements within the interface region is modeled using a discrete-jump model, while the bulk diffusion of C is treated using a standard continuum treatment. The model is validated against ferrite precipitation and decarburization kinetics in the Fe-Ni-C, Fe-Mn-C, and Fe-Mo-C systems.

引用

页码：3456 / 3471

页数：16

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