The Formation Energy of Martensite Nuclei and the Phase Transition Kinetics under the Action of an External Magnetic Field

Abstract:

The formation energy of martensite nuclei in the austenite matrix is calculated. Nanoclusters with ferromagnetic order, which exist in austenite above the Curie temperature, reduce the formation energy of a critical martensite nucleation center when exposed to an external magnetic field. The data obtained are explained by the magnetic separation of the initial phase under the action of a magnetic field. A fluctuation increase in nanovolumes with a ferromagnetic order in austenite increases the energy in a atoms group of the matrix phase with a parallel spins arrangement. As a result, the nucleation rate of the martensite phase increases and the martensitic transformation proceeds more completely.

• Periodical: Defect and Diffusion Forum (Volume 410)
• Pages: 3-8
• DOI: https://doi.org/10.4028/www.scientific.net/DDF.410.3
• Online since: August 2021
• Authors: Viktor N. Pustovoit, Yuri V. Dolgachev*
• Keywords: Ferromagnetic Nanoclusters, Magnetic Field, Martensitic Transformation, Nuclei, Quenching, Steel

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