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Home  >  Journal list  >  MATERIALS TRANSACTIONS  >  Vol.53  No.9 (2012)  >  pp.1598-1603

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Prediction of the Maximum Dislocation Density in Lath Martensitic Steel by Elasto-Plastic Phase-Field Method

Zhenhua Cong1), Yoshinori Murata1), Yuhki Tsukada2), Toshiyuki Koyama2)
1) Department of Materials, Physics and Energy Engineering, Graduate School of Engineering, Nagoya University 2) Department of Materials Science and Engineering, Graduate School of Engineering, Nagoya Institute of Technology

On the basis of the two types of slip deformation (TTSD) model of lath martensite, the martensitic transformation was simulated in Fe–0.1 mass% C steel by an elasto-plastic phase-field method. The TTSD model allowed us to predict the total dislocations for the necessity of the formation of lath martensite, which is taken as the upper limit of dislocation density in lath martensite. The calculated dislocation density by the simulation was reasonable to be higher than the observed dislocations in value but to be the same in order. This consistence indicates that the calculation method based on the TTSD model is credible, together with the calculation of the habit plane predicted by the TTSD model.

dislocation density, slip deformation, phase-field method, lath martensite

Received: February 20, 2012
Accepted: June 25, 2012 , Published online: August 25, 2012
Copyright © 2012 The Japan Institute of Metals



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