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Effect of continuous cooling on the morphology and kinetics of pearlite

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Abstract

The effect of variations in cooling rate on the morphology and kinetics of pearlite was studied and was contrasted with the isothermal and isovelocity modes of transformation. It was found that continuous cooling suppresses the pearlite transformation to a lower reaction temperature where finer nodule diameters and interlamellar spacings are produced. Growth rates in continuous cooling were in agreement with those for the isovelocity and isothermal transformations, the rate-controlling process for growth in the temperature range studied being volume diffusion in all three cases. The relationship between interlamellar spacing and undercooling was found to be SΔT = 8.02 × 104Å K, regardless of the mode of transformation.

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Authors and Affiliations

  1. Research Department, Bethlehem Steel Corporation, 18016, Bethlehem, PA

    A. R. Marder & B. L. Bramfitt

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  1. A. R. Marder
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  2. B. L. Bramfitt
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Marder, A.R., Bramfitt, B.L. Effect of continuous cooling on the morphology and kinetics of pearlite. Metall Trans A 6, 2009–2014 (1975). https://doi.org/10.1007/BF03161825

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