Thermodynamic Prediction and Experimental Verification of Transformation‐Induced Plasticity/Twinning‐Induced Plasticity Effects in Advanced Low‐C High‐Mn Steel at Different Deformation Temperatures

Abstract

The effectiveness of TRIP/TWIP effects in Fe‐0.06C‐26Mn‐3Si‐3Al advanced ferrous alloy was analysed over a wide temperature range of ‐40°C‐200°C. The specific deformation mechanisms in the steel were experimentally investigated and predicted using thermodynamic calculations of stacking fault energy. These predictions were correlated with the microstructure of steel and its mechanical behaviour. The study found that applied thermodynamic models effectively predict the occurrence of TRIP/TWIP effects at different deformation temperatures, aligning well with experimental observations in terms of ε/α' martensite formation, indicative of the TRIP mechanism. Some discrepancies in SFE results were observed at Mn contents significantly higher or lower than the nominal composition of steel.This article is protected by copyright. All rights reserved.