The Features of Microstructure and Mechanical Properties of Metastable Austenitic Steel Subjected to Low-Temperature and Subsequent Warm Deformation


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Abstract

The features of microstructure and phase composition of metastable austenitic steel subjected to thermomechanical treatment, including low-temperature processing accompanied by warm rolling deformation, are investigated. Direct (γ → α΄) and reverse strain-induced martensitic transformations are shown to take place, followed by the formation of submicrocrystalline states and 3–4-fold increase in the yield point values. The mechanisms of formation of submicrocrystalline states and the reasons for increased strength are discussed.

About the authors

I. Yu. Litovchenko

Institute of Strength Physics and Materials Science of the Siberian Branch of the Russian Academy of Sciences; National Research Tomsk State University

Author for correspondence.
Email: litovchenko@spti.tsu.ru
Russian Federation, Tomsk; Tomsk

S. A. Akkuzin

National Research Tomsk State University

Email: litovchenko@spti.tsu.ru
Russian Federation, Tomsk

N. A. Polekhina

Institute of Strength Physics and Materials Science of the Siberian Branch of the Russian Academy of Sciences; National Research Tomsk State University

Email: litovchenko@spti.tsu.ru
Russian Federation, Tomsk; Tomsk

A. N. Tyumentsev

Institute of Strength Physics and Materials Science of the Siberian Branch of the Russian Academy of Sciences; National Research Tomsk State University

Email: litovchenko@spti.tsu.ru
Russian Federation, Tomsk; Tomsk

E. P. Naiden

Institute of Strength Physics and Materials Science of the Siberian Branch of the Russian Academy of Sciences

Email: litovchenko@spti.tsu.ru
Russian Federation, Tomsk

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