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Behavior of steels near the incipient melting temperature

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Abstract

A new method of incipient melting temperature (IMT) detection has been developed in which a constant-strain-rate tensile deformation is applied to a specimen whose temperature is simultaneously increasing. The IMT is determined in a single test, and any phase transformations before the IMT will also be detected by the effects on the stress vs strain behavior in the same experiment. By means of such tests, the incipient melting behavior of a series of steels with carbon levels from 0.031 to 0.45 wt pct was examined. For the steels containing 0.08 to 0.097 pct C and about 1.5 pct Mn, it was found that incipient melting occurs in the two-phase (γ + δ) region in the temperature range from 1470 °C to 1480 °C and is significantly influenced by microalloying elements. In the ultralow-carbon steel (0.031 pct C), the IMT is in the single-phase δ region, and for the medium-carbon steel containing 0.42 pct C (hyperperitectic) it is in the γ single phase.

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Authors and Affiliations

  1. Department of Mechanical Engineering, McGill University, PQ H3A 2A7, Montreal, Canada

    F. Hassani (Graduate Student)

  2. Department of Mining and Metallurgical Engineering, McGill University, PQ H3A 2A7, Montreal, Canada

    T. M. Maccagno (Research Associate), J. J. Jonas (Professor) & S. Yue (Assistant Professor)

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  1. F. Hassani
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  2. T. M. Maccagno
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  3. J. J. Jonas
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  4. S. Yue
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Hassani, F., Maccagno, T.M., Jonas, J.J. et al. Behavior of steels near the incipient melting temperature. Metall Mater Trans A 25, 125–133 (1994). https://doi.org/10.1007/BF02646681

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  • DOI: https://doi.org/10.1007/BF02646681

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