General Method of Phase Transformation Modeling in Advanced High Strength Steels

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概要

• 論文の詳細を見る

• In the present paper, a new modeling approach is proposed for the austenite to ferrite and bainite transformation kinetics in transformation induced plasticity (TRIP) and complex phase (CP) steels. Based on experimental data obtained by dilatometry during continuous cooling, Rios method has been successfully applied assuming additivity to calculate the parameters for the Johnson–Mehl–Avrami–Kolmogorov (JMAK) model, i.e. exponent n and the rate parameter k. Limitations of the Rios method have been identified when k is a function of both temperature T and fraction transformed X. For these cases that are in particular relevant for the bainite transformation, a new modeling method has been developed to investigate the exact relationship of k with T and X. The new method has been used to describe the transformation kinetics in a TRIP and a CP steel. Good agreement has been obtained between the calculated and measured transformation data. The proposed new modeling method provides a general modeling approach that promises to be useful in predicting the complex phase transformation kinetics during industrial processing of advanced high strength steels (AHSS).

• 社団法人 日本鉄鋼協会の論文
• 2010-04-15

著者

• LIU Z.

  The State Key Laboratory of Rolling and Automation, Northeastern University

• Militzer M.

  The Centre For Metallurgical Process Engineering The University Of British Columbia

• JIA T.

  The State Key Laboratory of Rolling and Automation

関連論文

• The Onset Temperatures of γ to α-Phase Transformation in Hot Deformed and Non-deformed Nb Micro-alloyed Steels
• Microstructure and Mechanical Property of Strip in Fe-23Mn-3Si-3Al TWIP Steel by Twin Roll Casting
• Comparison of Precipitation Kinetics and Strengthening in an Fe-0.8%Cu Alloy and a 0.8%Cu-containing Low-carbon Steel
• Precipitation Kinetics and Strengthening of a Fe-0.8wt%Cu Alloy
• General Method of Phase Transformation Modeling in Advanced High Strength Steels
• Analysis of the Austenite Grain Size Distribution in Plain Carbon Steels

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