A Non-steady State Model for the Austenite-to-ferrite Transformation Kinetics under the Non-partition Condition in Fe-C-Mn Alloys

被引：1

作者：

Seki, Akira ^{[1
]}

Hayashi, Kotarou ^{[2
]}

Amino, Takafumi ^{[2
]}

Shigesato, Genichi ^{[3
]}

Nozaki, Takayuki ^{[4
]}

Azuma, Masafumi ^{[4
]}

Suehiro, Masayoshi ^{[5
]}

机构：

[1] Nippon Steel Technol Co Ltd, 1-8 Fuso Cho, Amagasaki, Hyogo 6600891, Japan

[2] Nippon Steel Corp Ltd, 1-8 Fuso Cho, Amagasaki, Hyogo 6600891, Japan

[3] Nippon Steel Corp Ltd, 20-1 Shintomi, Futtsu, Ciba 2938511, Japan

[4] Nippon Steel Corp Ltd, 5-3 Tokaimachi, Tokai, Aichi 4768686, Japan

[5] Nippon Steel Technol Co Ltd, Chiyoda Ku, 1-7-1 Yurakucho, Tokyo 1000006, Japan

来源：

ISIJ INTERNATIONAL | 2019年 / 59卷 / 12期

关键词：

austenite to ferrite transformation; interface migration; non-steady state model; kinetics model; para-equilibrium; local equilibrium; non-partition; negligible partition; SOLUTE DRAG; GRAIN-BOUNDARY; PROEUTECTOID FERRITE; GIBBS ENERGY; GROWTH; ELEMENTS; STEEL;

D O I：

10.2355/isijinternational.ISIJINT-2019-216

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

A non-steady state model describing the transition from the para-equilibrium to the local equilibrium under the non- or negligible-partition condition is proposed to investigate the austenite to ferrite transformation kinetics in Fe-C-Mn steels. The present model has been developed based on the quasi-steady state model used for calculating the solute drag force by the segregated solute within the ferrite/austenite interface, although the solute-drag force is not calculated in the present model. The calculated Mn profiles are compared with the STEM-EELS observation reported previously by some of the present authors. The temporal evolution of the Mn profiles during PE to NPLE is shown. Combining a simple C diffusion model, the transition path from PE to NPLE on the C-Mn isothermal section of an Fe-C-Mn alloy is also presented.

引用

页码：2311 / 2318

页数：8

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