Direct measurement of carbon enrichment during austenite to ferrite transformation in hypoeutectoid Fe-2Mn-C alloys

被引：83

作者：

Liu, Z. -Q. ^{[1
,2
]}

Miyamoto, G. ^{[2
]}

Yang, Z. -G. ^{[1
]}

Furuhara, T. ^{[2
]}

机构：

[1] Tsinghua Univ, Dept Mat Sci & Engn, Beijing 100084, Peoples R China

[2] Tohoku Univ, Inst Mat Res, Aoba Ku, Sendai, Miyagi 9808577, Japan

来源：

ACTA MATERIALIA | 2013年 / 61卷 / 08期

关键词：

Proeutectoid ferrite; PLE/NPLE; Paraequilibrium; EPMA; Carbon enrichment; CONTROLLED PRECIPITATE GROWTH; FE-C ALLOYS; PROEUTECTOID FERRITE; SOLUTE DRAG; PHASE-TRANSFORMATIONS; TERNARY-SYSTEMS; X ALLOYS; KINETICS; DIFFUSION; STEELS;

D O I：

10.1016/j.actamat.2013.02.003

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Carbon enrichment in untransformed austenite at the end of Mn partitionless growth of ferrite for Fe-2Mn-(0.05, 0.14)C (mass%) alloys isothermally transformed in the temperature range 873-998 K was measured using field-emission electron probe microanalysis to reveal its dependence on the transformation temperature, nominal carbon content and prior austenite grain size. The PLE/NPLE model gives much better predictions than the PE model for carbon enrichment in untransformed austenite at the end of partitionless growth. Carbon enrichment could be increased by reducing the prior austenite grain size. Furthermore, carbon enrichment shifted from the PLE/NPLE transition line to the T-0 line on lowering the transformation temperature. This shift is probably attributed to the solute drag effect and/or to the finite interface mobility, both of which vary with the transformation temperature. (c) 2013 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：3120 / 3129

页数：10

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