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Metallurgical and Materials Transactions A

, Volume 44, Issue 7, pp 3136–3146 | Cite as

Constitutive Modeling of the Mechanical Properties of V-added Medium Manganese TRIP Steel

  • Seawoong Lee
  • Yuri Estrin
  • Bruno C. De CoomanEmail author
Article

Abstract

In this study, medium Mn transformation-induced plasticity steel with the composition Fe-0.08 pct C-6.15 pct Mn-1.5 pct Si-2.0 pct Al-0.08 pct V was investigated. After intercritical annealing at 1013 K (740 °C), the steel contained coarse-grained ferrite and two ultrafine-grained (UFG) phases: ferrite and retained austenite. The material did not deform by localized Lüders band propagation: it did not suffer from this major problem as most UFG steels do. Localization of plastic flow was shown to be suppressed because of a combination of factors, including a bimodal grain size distribution, a multiphase microstructure, the presence of nanosized vanadium carbide precipitates, and the occurrence of the deformation-induced martensitic transformation of retained austenite. A constitutive model incorporating these effects was developed. The model was used to identify the factors which can lead to a further improvement of the mechanical properties of the UFG medium Mn TRIP steels.

Keywords

Ferrite Austenite Martensite Intercritical Annealing Martensite Volume Fraction 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgments

This research was supported by the WCU (World Class University) program through the National Research Foundation of Korea funded by the Ministry of Education, Science and Technology (R32-10147 and R31-2008-000-10075-0).

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Copyright information

© The Minerals, Metals & Materials Society and ASM International 2013

Authors and Affiliations

  • Seawoong Lee
    • 1
  • Yuri Estrin
    • 2
  • Bruno C. De Cooman
    • 1
    Email author
  1. 1.Graduate Institute of Ferrous TechnologyPohang University of Science and TechnologyPohangSouth Korea
  2. 2.Center for Advanced Hybrid Materials, Department of Materials EngineeringMonash UniversityClaytonAustralia

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