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Forced velocity pearlite in high purity Fe-C alloys: Part II. Theoretical

  • Symposium on Establishment of Microstructural Spacing during Dendritic and Cooperative Growth
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Abstract

The forced velocity pearlite data of Part I is compared to the Zener-Hillert treatment and shown to fit the volume diffusion model but requires aD value higher than that of the Wells’et al.16 data by a factor of 3 to 4. It is postulated that the highD value is due to a strain in the austenite phase at the growth front. It is found that inclusion of a mobility term, μ, in the Zener-Hillert analysis requires a quadratic form,V = μΔ2, in order to fit the data. Additional experiments have shown that the degenerate pearlite found at high growth velocities results from coarsening of fine pearlite as it cools from the growth front temperatures. Finally, some speculations are offered to explain the various interesting growth features of pearlite presented in Part I.

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Authors and Affiliations

  1. Department of Materials Science and Engineering, Iowa State University, 50011, Ames, IA

    J. D. Verhoeven (Professor)

  2. United Technologies Research Center, Silver Lane, 06108, CT, East Hartford

    D. D. Pearson (Research Scientist)

Authors
  1. J. D. Verhoeven
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  2. D. D. Pearson
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Additional information

This paper is based on a presentati on made at the symposium “Establishment of Microstructural Spacing during Dendritic and Cooperative Growth” held at the annual meeting of the AIME in Atlanta, Georgia on March 7, 1983 under the joint sponsorship of the ASM-MSD Phase Transformations Committee and the TMS-AIME Solidification Committee.

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Verhoeven, J.D., Pearson, D.D. Forced velocity pearlite in high purity Fe-C alloys: Part II. Theoretical. Metall Trans A 15, 1047–1054 (1984). https://doi.org/10.1007/BF02644696

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