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Effect of deformation on ferrite nucleation and growth in a plain carbon and two microalloyed steels

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Abstract

Isothermal compression tests were carried out on plain C, Mo, and Mo−Nb−V microalloyed steels in order to study the effect of austenite deformation on the ferrite nucleation and growth rates. The nucleation rate increases with deformation and the degree of supersaturation, Ae3−T; it appears to be reduced by the substitutional elements Mo, Nb, and V through reduction of the austenite grain boundary energy. The growth rate increases with the degree of supersaturation and is also reduced by these elements, apparently through the solute drag-like effect. Under static conditions, increasing the prestraining strain rate increases the nucleation rate, but this increase is small compared to the effect of concurrent deformation. The growth rate under static conditions decreases as the deformation or the strain rate is increased.

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Authors and Affiliations

  1. Industrial Materials Research Institute, 75 boul. de Mortagne, PQ J4B 6Y4, Boucherville

    E. Essadiqi

  2. Department of Metallurgical Engineering, McGill University, 3450 University Street, H3A 2A7, Montreal, PQ, Canada

    J. J. Jonas (CSIRA/NSERC Professor of Steel Processing)

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  1. E. Essadiqi
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  2. J. J. Jonas
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E. E, formerly with the Department of Metallurgical Engineering, McGill University

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Essadiqi, E., Jonas, J.J. Effect of deformation on ferrite nucleation and growth in a plain carbon and two microalloyed steels. Metall Trans A 20, 987–998 (1989). https://doi.org/10.1007/BF02650136

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