Reversible Martensitic Transformation Produced by Severe Plastic Deformation of Metastable Austenitic Steel

Abstract:

The peculiarities of martensitic transformations and formation of nanostructured states in metastable austenitic steel (Fe-18Cr-8Ni-Ti) after severe plastic deformation by high pressure torsion are investigated. It is shown that during severe plastic deformation with increased strain rate not only direct (γ→α΄) but also reverse (α΄→γ) martensitic transformations occur, which is revealed by the changes in the volume content of α΄ - martensite during deformation. The fragments thought to be formed by direct and reverse martensitic transformations and those of dynamic recrystallization of austenite are observed.

• Periodical: Materials Science Forum (Volumes 738-739)
• Pages: 491-495
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.738-739.491
• Online since: January 2013
• Authors: Igor Litovchenko, Alexander Tyumentsev, Alexander V. Korznikov
• Keywords: Austenitic Steel, Electron Microscopy, Martensitic Transformation (MT), Nanostructured State, Severe Plastic Deformation (SPD)

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