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Work Hardening Behavior of Fe-0.1 C Dual Phase Steel

Kaltverfestigungsverhalten von Fe-0.1 C 2 Phasen-Stählen

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Zusammenfassung

Der Verfestigungsexponent (n) in der Spannungs- Dehnungsbeziehung von Metallen und Legierungen ist ein Indikator ihrer Streckbarkeit während der Verformung. Je größer der n-Faktor, desto mehr Material kann verformt werden bevor der Prozess instabil wird. Das Material kann weiter gestreckt werden, bevor eine Einschnürung beginnt. Dieser Beitrag untersucht das Kaltverfestigungsverhalten von 2 Phase-Stählen. In einer Versuchsserie von DP-Stählen wurden unterschiedliche Ferrit- und Martensitverhältnisse (Vm) durch spezifi- sche Wärmebehandlungen eingestellt. Das Verfestigungsverhalten wurde mit Hilfe der Holloman Analyse bestimmt. Die Ergebnisse zeigen, dass in DP-Stählen mit weniger als 50 % Vm die Verfestigung in einem einstufigen Prozess stattfindet. Mit steigenden Vm wurde ein mehrstufiger Verfestigungsprozess beobachtet.

Summary

The strain hardening exponent (n) in the stress strain relationship of metals and alloys is an indicator of their stretchability during press forming operations. The larger the n value, the more the material can deform before instability, and the material can be stretched further before necking starts. This paper aims to investigate work hardening behavior of dual phase steels. A series of dual-phase (DP) steels containing ferrite and martensite with different volume fractions of martensite (Vm) were produced by intercritical heat treatment. Work hardening behavior was analyzed in terms of Holloman analysis. Results showed that in DP steels with less than %50 Vm, the work hardening took place in one stage and the work hardening exponent increased with increasing Vm. By increasing the volume fraction of martensite (Vm>%50) more than one stage will be observed in the Holloman analysis.

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Authors and Affiliations

  1. Lecturer, Materials and Metallurgical Engineering Department, Dezful Branch, Islamic Azad University, Dezful, Iran

    Majid Pouranvari

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  1. Majid Pouranvari
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Correspondence to Majid Pouranvari.

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Pouranvari, M. Work Hardening Behavior of Fe-0.1 C Dual Phase Steel. Berg Huettenmaenn Monatsh 157, 44–47 (2012). https://doi.org/10.1007/s00501-011-0036-x

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  • DOI: https://doi.org/10.1007/s00501-011-0036-x

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