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Effect of Prior Austenite Grain Size on Pearlite Transformation in a Hypoeuctectoid Fe-C-Mn Steel

  • Symposium: International Workshop on Materials Design Process: Thermodynamics, Kinetics and Microstructure Control
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Abstract

The aim of this work is to evaluate the influence of the prior austenite grain size (AGS) on the austenite-to-pearlite isothermal decomposition in a Fe-C-Mn hypoeutectoid steel. Due to the strong influence, grain boundaries have on pearlite transformation kinetics, morphological aspects of pearlite from two conditions with very different AGS were studied and characterized. Results allow us to conclude that the formation of pearlite and ferrite are favored for small AGS values, whereas a larger AGS led to an increase in the total amount of pearlite volume fraction. Furthermore, the average size of pearlitic colonies increased with increasing AGS, and it appears that the interlamellar spacing of the pearlite does not depend on AGS, but instead, is controlled by the isothermal decomposition temperature. Finally, it was observed that the ratio between lamellar thickness of ferrite and cementite depended on AGS.

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Authors and Affiliations

  1. Materalia Group, Centro Nacional de Investigaciones Metalúrgicas (CENIM-CSIC), Avda. Gregorio del Amo, 8, 28040, Madrid, Spain

    M. M. Aranda (Ph.D. Student), R. Rementeria (Ph.D. Student), C. Capdevila (Research Scientist) & C. García de Andrés (Senior Scientist)

  2. Department of Materials Science and Metallurgy, University of Cambridge, Pembroke Street, Cambridge, CB2 3QZ, U.K.

    B. Kim (Ph.D. Student)

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  1. M. M. Aranda
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  2. B. Kim
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  3. R. Rementeria
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  4. C. Capdevila
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  5. C. García de Andrés
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Correspondence to M. M. Aranda.

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Manuscript submitted June 18, 2013.

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Aranda, M.M., Kim, B., Rementeria, R. et al. Effect of Prior Austenite Grain Size on Pearlite Transformation in a Hypoeuctectoid Fe-C-Mn Steel. Metall Mater Trans A 45, 1778–1786 (2014). https://doi.org/10.1007/s11661-013-1996-0

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  • DOI: https://doi.org/10.1007/s11661-013-1996-0

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