Open Access System for Information Sharing

Login Library

 

Article
Cited 41 time in webofscience Cited 47 time in scopus
Metadata Downloads

Thermodynamic Analysis of Mn-depleted Zone Near Ti Oxide Inclusions for Intragranular Nucleation of Ferrite in Steel

Title
Thermodynamic Analysis of Mn-depleted Zone Near Ti Oxide Inclusions for Intragranular Nucleation of Ferrite in Steel
Authors
Kang, YBLee, HG
POSTECH Authors
Kang, YB
Date Issued
2010-04
Publisher
ISIJ Int.
Abstract
A series of thermodynamic analyses have been performed to elucidate possible mechanism of Mn-depleted zone (MDZ) development near Ti oxide inclusions as nucleation sites of Intragranular Acicular Ferrite (IGF) transformation in steels, using a computational thermodynamic approach (CALPHAD). It is demonstrated that thermodynamic calculations are able to reproduce experimentally known inclusions evolution in the steels. The MDZ development near the Ti(2)O(3) inclusions is shown to be a result of Mn absorption into the Ti(2)O(3). Moreover, from thermodynamic analysis of phase equilibria in the Mn Ti complex oxide system, it is proposed that a phase change of inclusion from (Ti(3)O(5)) s.s. (pseudobrookite structure solid solution dissolving Mn) to (Ti(2)O(3)) s.s. (ilmenite structure solid solution dissolving Mn) accelerate the Mn absorption into the Ti(2)O(3) inclusion in steel. From a series of thermodynamic calculations, optimum thermal heating condition to enhance Mn absorption into Ti(2)O(3) inclusions as well as IGF formation is discussed.
Keywords
Mn-depleted zone (MDZ); intragranular ferrite (IGF); inclusion; computational thermodynamics (Calphad); Ti(2)O(3); Ti(3)O(5); SI/MN DEOXIDIZED STEEL; HEAT-AFFECTED ZONE; LOW-CARBON STEELS; PHASE-EQUILIBRIA; ACICULAR FERRITE; PRECIPITATION; SYSTEM; OPTIMIZATION; TRANSFORMATION; DIAGRAMS
URI
https://oasis.postech.ac.kr/handle/2014.oak/17624
DOI
10.2355/ISIJINTERNATIONAL.50.501
ISSN
0915-1559
Article Type
Article
Citation
ISIJ INTERNATIONAL, vol. 50, no. 4, page. 501 - 508, 2010-04
Files in This Item:
There are no files associated with this item.

qr_code

  • mendeley

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

Related Researcher

Researcher

강윤배KANG, YOUN-BAE
Ferrous & Energy materials Technology
Read more

Views & Downloads

Browse