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Strain Hardening Behavior of Dual-Phase Steels

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Abstract

A detailed qualitative and quantitative examination of the microstructure and mechanical properties of three different classes of DP600 and DP450 dual-phase (DP) steels was carried out. The tested DP steels are characterized by different alloying elements: aluminum, boron, and phosphorus. Among them, aluminum DP steels showed the lowest percentages of hard phases, while phosphorus DP steels exhibited the highest resistance values. The Hollomon, Pickering, Crussard–Jaoul (CJ), and Bergstrom models were used to reproduce the strain hardening behavior of DP steels. Relationships that correlate the fitting parameters with the chemical composition and the thermal cycle parameters were found, and the predictive abilities of different models were evaluated. The Pickering equation, among the tested models, is the best one in the reproduction of the experimental stress-strain data.

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Authors and Affiliations

  1. Scuola Superiore di Studi Universitari e di Perfezionamento Sant’Anna – Pisa, Pisa, Italy

    V. Colla (Technical Research Manager) & A. Dimatteo (Young Researcher)

  2. Dipartimento di Ingegneria Chimica, Chimica Industriale e Scienza dei materiali, Università di Pisa – Pisa, Pisa, Italy

    M. De Sanctis (Associate Professor), G. Lovicu (Research Assistant), A. Solina (Associate Professor) & R. Valentini (Assistant Professor)

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  1. V. Colla
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  2. M. De Sanctis
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  3. A. Dimatteo
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  4. G. Lovicu
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  5. A. Solina
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Correspondence to A. Dimatteo.

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Manuscript submitted March 18, 2008.

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Colla, V., De Sanctis, M., Dimatteo, A. et al. Strain Hardening Behavior of Dual-Phase Steels. Metall Mater Trans A 40, 2557–2567 (2009). https://doi.org/10.1007/s11661-009-9975-1

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