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An estimate of the nucleation time in the martensitic transformation

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Abstract

A method for the determination of nucleation times for martensitic transformation is described. The method utilizes a shock wave that, upon being reflected at a free surface, generates a tensile wave with a pulse duration that increases as it moves away from the surface. Once the duration of the reflected pulse is large enough for nucleation to occur, transformation can take place. The width of the martensite free layer adjoining the surface is measured and compared with wave predictions. A nucleation time can be obtained. The method requires that the temperature, pulse amplitude, and alloy composition be such that only the reflected tensile wave induce martensite transformation. For the experimental conditions used by Snell, Shyne, and Goldberg10 the nucleation time is found to be less than 55 nanoseconds.

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Author notes

  1. Marc A. Meyers (Associate Professor)

    Present address: Department of Metallurgical and Materials Engineering, New Mexico Institute of Mining and Technology, 87801, Socorro, NM

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    1. Marc A. Meyers
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    MARC A. MEYERS, formerly Assistant Professor, Department of Metallurgical Engineering, South Dakota School of Mines and Technology

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    Meyers, M.A. An estimate of the nucleation time in the martensitic transformation. Metall Trans A 10, 1723–1727 (1979). https://doi.org/10.1007/BF02811707

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    • DOI: https://doi.org/10.1007/BF02811707

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