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X-ray diffraction and magnetic characterization of the retained austenite in a chromium alloyed high carbon steel

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Abstract

In the present work the amount of retained austenite present in quenched and tempered high carbon–chromium alloyed steel was quantified by X-ray diffraction and magnetization saturation measurements. The steel was forged and directly quenched. The retained austenite partially transformed into martensite on cooling down to −196 °C. The Mf temperature of about −150 °C was found by thermomagnetic analysis. Tempering at low temperatures (220 °C and 270 °C) promoted the stabilization effect of austenite. The intrinsic magnetization of the ferromagnetic martensite used in the phase quantification was 206.4 A2 m/kg. The increase of the tempering temperature above 320 °C slightly decreases the m s value of the martensite due to tempering reactions.

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Acknowledgements

The authors acknowledge of the Brazilian research agencies (CAPES, FAPERJ and CNPq) for financial support.

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Authors and Affiliations

  1. Departamento de Engenharia Mecânica-PGMEC, Universidade Federal Fluminense, Rua Passo da Pátria, 156, CEP 24210-240, Niterói, Rio de Janeiro, Brazil

    S. S. M. Tavares, S. R. Mello & J. M. Pardal

  2. Instituto de Física, Universidade Federal do Rio de Janeiro, , Rio de Janeiro, Brazil

    A. M. Gomes & J. M. Neto

  3. UNIFEI, Itajubá, Brazil

    M. R. da Silva

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  1. S. S. M. Tavares
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  2. S. R. Mello
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  3. A. M. Gomes
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  4. J. M. Neto
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  5. M. R. da Silva
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  6. J. M. Pardal
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Correspondence to S. S. M. Tavares.

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Tavares, S.S.M., Mello, S.R., Gomes, A.M. et al. X-ray diffraction and magnetic characterization of the retained austenite in a chromium alloyed high carbon steel. J Mater Sci 41, 4732–4736 (2006). https://doi.org/10.1007/s10853-006-0025-8

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  • DOI: https://doi.org/10.1007/s10853-006-0025-8

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