Use of the Superplasticity Phenomenon of Steel for "Internal" Magnetic Correcting a Product

Abstract:

The results of the course of martensite transformation in steel under the action of the magnetic field are presented. These results indicate that the formation of stress-assisted martensite in the temperature interval M_d-M_s (where superplasticity was observed) is possible. It was found that during hardening of steel products in magnetic field, martensite can be formed not only below M_s, but higher than this point (in the temperature range). The significant structural transformations and steel properties improvement under thermal treatment in a magnetic field depend on the catalytic effect of a field on the transformation development. This effect occurs when the initial phase is paramagnetic, and the product of the transformation is ferromagnetic. Stress-assisted martensite and cooling-induced martensite are formed in the superplastic temperature range of the austenite. This makes it possible for the undeformation hardening of steel products in a magnetic field. The undeformation hardening is caused by a magnetic field holding the product and the formation of martensitic structure oriented predominantly towards the magnetic field vector.

• Periodical: Solid State Phenomena (Volume 265)
• Pages: 745-749
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.265.745
• Online since: September 2017
• Authors: Viktor N. Pustovoit, Yuri V. Dolgachev, Yu.M. Dombrovskii*
• Keywords: Alloy, Ferromagnetic Ordering Clusters, Magnetic Field, Martensite, Superplasticity, Tempering

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