Push-pull tests at fixed plastic strain amplitude or stress were run on a TWIP steel, and followed by TEM observations, to analyze its cyclic behavior in relation with the deformation mechanisms. The kinematic isotropic components of flow measured throughout whole hardening/softening stages, their evolution cumulated was compared those tension. rise internal found responsible for initial harden...

In situ tensile and reversed cyclic tests were run on a TWIP steel in SEM, with High-Resolution Digital Image Correlation (HR-DIC) measurements of the plastic strain field few selected grains prone to twinning, spatial resolution between 150 250 nm, or under an AFM, surface steps height at emerging deformation twins. Evidences detwinning upon load reversal, as well quantitative data twinning/de...

Advanced high strength steels (AHSS) have recently attracted great attention because of their superior mechanical properties. A modern group of these steels, known as twinning induced plasticity (TWIP) steels, shows a unique combination of strength and ductility even at high rates of strain. In order to examine the functionality of such steels in dynamic loading conditions, their mechanical beh...

In this study, the effect of tensile test temperature (148 to 673 K) on the microstructural evolutions and the mechanical properties of high manganese twinning induced plasticity (TWIP) steel with the chemical composition of Fe- 31Mn-3Al-3Si (wt. %) was investigated. XRD, SEM and TEM were used to study the microstructural evolutions. Stacking fault energy (SFE) of the alloy was also calculated ...

High-manganese twinning-induced plasticity (TWIP) steels exhibit high strain hardening, tensile strength, and ductility, which make them attractive for structural applications. At low rates, TWIP are prone to hydrogen embrittlement (HE). Here though, we study the hardening strengthening resulting from electrochemical hydrogen-charging of a surface layer Fe-26.9Mn-0.28C (wt.%) steel. We observed...