This investigation reveals how different stress states affect transformation and ageing in medium-manganese steels, suggesting implications for material design.
Key Points
The research aims to understand the mechanical response and transformation behaviors of medium-manganese TRIP steels under varying stress states.
Analyzed two steels with globular and lamellar microstructures differing in retained austenite fractions.
Conducted continuous and interrupted tests under shear, uniaxial tension, and plane strain stress states.
Utilized digital image correlation for strain field analysis and X-ray diffraction for quantifying retained austenite.
Demonstrated pronounced stress-state dependence affecting yielding and transformation rates.
SA samples showed discontinuous yielding and Lüders band formation in uniaxial tests.
Dynamic and static strain ageing were observed, with PLC serrations being more prominent under uniaxial tension.
Cite This Study
Carreno-Saavedra et al. (2026) studied this question.