The TRIP effect and deformation behavior of metastable austenitic steel were studied under tension in the temperatures range from –120 to +200°C. The original steel microstructure consists of austenite and martensite (50 : 50). The optimal combination of the ultimate strength (about 2395 MPa) and percent elongation (28%) was observed at –100°C due to the TRIP effect, which did not exist above 100°C and below –120°C. The DSC and DMA methods were used to study the transformation temperatures. Based on the analysis of the deformation curves, phase transformation temperatures, and fracture surfaces, changes in the deformation mechanisms at different temperatures can be expected.
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This study was supported by the Russian Foundation for Basic Research (Grant No. 16-58-48001) and Department of Science and Technology (India) (Grant No. DST/INT/RFBR/IDIR/P-04/2016).
The authors would like to thank Prof. K. A. Padmanabhan for study discussions, Prof. V. F. Terentyev for providing the samples and XRD analysis, and S. I. Sinev for assistance in conducting the DSC analysis.
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Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 6, pp. 45 – 51, June, 2021.
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Stolyarov, V.V., Frolova, A.V., Tilak Kumar, J.V. et al. Deformation Behavior of Metastable Austenitic Steel at Low and Moderate Temperatures. Met Sci Heat Treat 63, 334–340 (2021). https://doi.org/10.1007/s11041-021-00691-9
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DOI: https://doi.org/10.1007/s11041-021-00691-9