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Enhancement of plastic flow during massive transformations

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Abstract

An enhancement of plastic flow under an applied tensile stress has been observed during a relatively slow γ(fcc)→ αm (bcc) massive transformation in a Fe 2.0 at. pct Cr alloy. As the rate of transformation increases with undercooling the flow rate also increases; but the time during which the enhanced flow can take place becomes progressively shortened. Enhanced plastic flow was not observed during a β(bcc) → ξm (hep) massive transformation in Ag-Al and Cu-Ga alloys, apparently because the duration of the trans-formation was too short to yield a measurable effect. The elongation behavior observed during the γ → αm reaction indicates that an enhanced flow is associated with the move-ment of the incoherent γ/αm interfaces that are active during a massive transformation and that the rate of enhanced flow increases with increased interface velocity.

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Authors and Affiliations

  1. Carnegie-Mellon University, 15212, Pittsburgh, PA

    T. B. Massalski (Professor of Metallurgy and Materials Science)

  2. R and C Laboratory, Alloy Steels Plant, Durgapur, W.B., India

    S. K. Bhattacharyya

  3. University of Wisconsin, 53706, Madison, WI

    J. H. Perepezko (Assistant Professor of Metallurgical Engineering)

Authors
  1. T. B. Massalski
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  2. S. K. Bhattacharyya
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  3. J. H. Perepezko
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Massalski, T.B., Bhattacharyya, S.K. & Perepezko, J.H. Enhancement of plastic flow during massive transformations. Metall Trans A 9, 53–56 (1978). https://doi.org/10.1007/BF02647170

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  • DOI: https://doi.org/10.1007/BF02647170

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