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Structure and Mechanical Properties of High-Strength Austenitic-Martensitic Trip-Steel VNS9-Sh

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The structure and mechanical properties of cold-rolled thin-sheet austenitic-martensitic trip-steel VNS9-Sh are studied. The method of electron back-scatter diffraction (EBSD) is used to determine the substructural state of the steel represented by mechanically hardened metastable austenite with a great number of strain twins and strain α′-martensite. The preferred places of nucleation of strain martensite in the range of intersection of strain twins and shear bands are detected. The mechanical properties of steel VNS9-Sh and the main deformation stages, i.e., microscopic yield, yield (Luders–Chernov strain) and strain hardening are determined.

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The work has been performed with financial support of the Russian Foundation for Basic Research (Grants No. 15-08-02518 and 16-58-48001).

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Authors and Affiliations

  1. Belgogrod State University, Belgorod, Russia

    P. S. Kusakin

  2. A. A. Baikov Institute of Metallurgy and Materials Science of the Russian Academy of Sciences, Moscow, Russia

    V. F. Terent’ev

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  1. P. S. Kusakin
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  2. V. F. Terent’ev
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Correspondence to V. F. Terent’ev.

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Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 1, pp. 9 – 13, January, 2019.

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Kusakin, P.S., Terent’ev, V.F. Structure and Mechanical Properties of High-Strength Austenitic-Martensitic Trip-Steel VNS9-Sh. Met Sci Heat Treat 61, 10–14 (2019). https://doi.org/10.1007/s11041-019-00369-3

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