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Effects of Second Phase Particles on Migration of α/γ Interface during Isothermal α to γ Transformation

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Title: Effects of Second Phase Particles on Migration of α/γ Interface during Isothermal α to γ Transformation
Authors: Chen, Liang Browse this author
Matsuura, Kiyotaka Browse this author →KAKEN DB
Ohno, Munekazu Browse this author →KAKEN DB
Sato, Daisuke Browse this author
Keywords: phase transformation
α/γ interface
second phase particle
pinning effect
diffusion couple
multi-phase field simulation
Issue Date: Oct-2012
Publisher: Iron and Steel Institute of Japan
Journal Title: ISIJ International
Volume: 52
Issue: 10
Start Page: 1841
End Page: 1847
Publisher DOI: 10.2355/isijinternational.52.1841
Abstract: The effects of insoluble particles on migration of ferrite (α)/austenite (γ) interface during isothermal α to γ transformation at 1133 K have been studied by means of a model experiment using diffusion couple method and a multi-phase field simulation. It was found that the insoluble particles, ZrO2 or TiO2 particles, could retard the migration of α/γ interface. And the tendency that the retarding effect becomes stronger with higher volume fraction of TiO2 particle was observed. However, the retarding effect of ZrO2 on α/γ interface is not as strong as that on δ–ferrite (δ)/austenite (γ) interface during peritectic transformation. The phase field simulation indicates that this reduction of retarding effect originates from the appearance of carbon pile-up in γ phase, which is also caused by the existence of particles. In addition, it is shown that the difference between σα/p and σγ/p, the interfacial energy between matrix (α or γ) and particles, strongly affects the migration velocity of α/γ interface.
Rights: 著作権は日本鉄鋼協会にある
Type: article
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 大野 宗一

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