Effect of the Rate of Shock-Wave Loading on the Structural and Phase Transformations of a Cr–Mn Nitrogen-Containing Austenitic Steel


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Abstract

Optical metallography, transmission electron microscopy, and EBSD analysis have been used to study the structural and phase transformations at various rates of shock-wave loading in the 0.4N–20Сr–6Ni–11Mn–2Mo–V–Nb (Kh20N6G11М2AFB) austenitic stainless steel. The shock deformation of the investigated steel at a rate of 471 m/s resulted in an increase in the density of dislocations to 8 × 1010 cm–2 and in the formation of ε martensite with a hcp lattice. An increase in the loading rate from 471 to 904 m/s at the initial room temperature led to a heating of austenitic steel samples without the formation of recrystallized grains but caused a reverse ε → γ transformation with inheritance of dislocations.

About the authors

V. V. Sagaradze

Mikheev Institute of Metal Physics, Ural Branch, Russian Academy of Sciences

Author for correspondence.
Email: vsagaradze@imp.uran.ru
Russian Federation, Ekaterinburg, 620108

N. V. Kataeva

Mikheev Institute of Metal Physics, Ural Branch, Russian Academy of Sciences

Email: vsagaradze@imp.uran.ru
Russian Federation, Ekaterinburg, 620108

A. V. Pavlenko

Russian Federal Nuclear Center, Zababakhin All-Russia Research Institute of Technical Physics

Email: vsagaradze@imp.uran.ru
Russian Federation, Snezhinsk, Chelyabinsk oblast, 456770

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