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A Study of Austempered Ductile Cast Iron

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Abstract

Experiments were carried out on unalloyed ductile cast iron to evaluate the % retained austenite (%RY) and its lattice parameter as a function of austenitizing time and temperature for austempering temperatures ranging from 270 to 420°C. Results are related to expected carbon levels in the gamma iron matrix at the austenitizing temperature. It is shown that the rate of austenitization can be described as a two step process and experiments demonstrate that 900°C austenitizatlon is complete after 8m. An 1100°C homogenization has been shown to have a small effect upon %RY and rate of austenitization.

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Authors and Affiliations

  1. Dept. MSE and Ames Laboratory, Iowa State University, Ames, Iowa, 50011, USA

    J. D. Verhoeven, D. P. Cornwell & F. Laabs

  2. Dept. Met., Military Techn. College, Cairo, Egypt

    A. El Nagar & B. El Sarnagawa

Authors
  1. J. D. Verhoeven
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  2. A. El Nagar
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  3. B. El Sarnagawa
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  4. D. P. Cornwell
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  5. F. Laabs
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Verhoeven, J.D., El Nagar, A., El Sarnagawa, B. et al. A Study of Austempered Ductile Cast Iron. MRS Online Proceedings Library 34, 387–398 (1984). https://doi.org/10.1557/PROC-34-387

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  • DOI: https://doi.org/10.1557/PROC-34-387

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