Twinning-induced plasticity (TWIP) steel is a second-generation advanced high strength grade developed for automotive applications. TWIP steels exhibit an excellent combination of and ductility, mainly originating from the activation deformation twinning. However, generally relatively low yield (YS), which limits their practical Thus, developing YS without ductility loss essential to increase i...

In the present work, hydrogen/material interaction with two austenitic steel types, created via a completely different alloying strategy, is investigated. The steels include 304L stainless (ASS) and 18Mn-0.6C twinning-induced plasticity (TWIP) steel. Constant extension rate tensile tests are performed to evaluate influence of hydrogen on deformation fracture mechanisms. A reference condition wi...

The problem: A new type of steel is known as Twining Induced Plasticity Steel, more commonly known as TWIP Steel. There is a general interest in using this type of steel in the automotive industry due to its unique material properties such as super toughness and super ductility, although its chemical properties also play a vital role. It has a high content of Mn (more than 25%) and about 3% Si ...

The elementary mechanisms controlling the interactions between lattice gliding dislocations and twin boundaries were carefully analyzed using conventional and advanced transmission electron microscopy techniques in both bulk coarsegrained Fe-Mn-C TWIP steels with deformation twins and nanocrystalline Palladium thin films with nanoscale growth twins. The results reveal that the individual disloc...

In this work, dynamic mechanical properties of three high-manganese steels with TRIP/TWIP or fully TWIP characteristics are studied. High strain rate experiments in the range of true strain rates between ~500 and 1800 /s are conducted using a dynamic torsional testing setup. All the three steels show a positive strain rate sensitivity in the intermediate range of strain rates (up to 500 /s). Bu...

The hot ductility of V containing high Al, TWIP steels was determined at a 1000°C, when no dynamic recrystallisation occurred, and precipitation too coarse to influence ductility. A change in g...

A medium Mn steel of composition Fe-4.8Mn-2.8Al-1.5Si-0.51C (wt.%) was processed to obtain two different microstructures representing approaches in the hot rolling mill, resulting equiaxed vs. mixed and lamellar microstructures. Both were found exhibit a simultaneous Twinning Induced Plasticity Transformation (TWIP ? TRIP) mechanism where deformation twins ??-martensite formed independently twi...