Effect of Substitutional Alloying Elements on the Stacking Fault Energy in Austenitic Steels

• Published in: Russian metallurgy Metally Vol. 2021; no. 10; pp. 1325 - 1332
• Main Authors: Blinov, V. M., Bannykh, I. O., Lukin, E. I., Bannykh, O. A., Blinov, E. V., Chernogorova, O. P., Samoilova, M. A.
• Format: Journal Article
• Language: English
• Published: Moscow Pleiades Publishing 01.10.2021; Springer Nature B.V
• Subjects: Alloying elements; Applied Problems of Strength and Plasticity; Austenitic stainless steels; Chemistry and Materials Science; Chromium; Ferromanganese; Ferrous alloys; Low carbon steels; Manganese; Materials Science; Metallic Materials; Nickel; Stacking fault energy; Temperature dependence; stacking fault probability; phase composition; austenitic steel; stacking fault energy
• ISSN: 0036-0295; 1555-6255; 1531-8648
• DOI: 10.1134/S0036029521100086

The results of the structure and stacking fault energy (SFE) investigations of low-carbon austenitic steels alloyed with substitutional elements are summarized. An increase in the manganese content in the range 7–20 wt % in Fe–Mn alloys is shown to make austenite stable to the γ–α transformation and unstable to the γ–ε transformation. Ferromanganese steel containing 20 wt % Mn has the maximum number (50–55%) of stacking faults after deformation. The SFE of Fe–Mn alloys is inversely proportional to the manganese content at Mn < 14 wt % and directly proportional at higher manganese concentrations. A temperature dependence of the SFE on the manganese content is found for Fe–Mn alloys. The effect of chromium on the SFE depends on the manganese content. A linear dependence of the SFE on the nickel content in Cr–Ni steels with 10–25 wt % Cr is found in the concentration range 10–25 wt %.