Twinning-induced plasticity (TWIP) steel offers high strength and ductility. However, in this study, deformation-induced detwinning was studied to prove that not all twins significantly benefit the mechanical properties. The quasi situ observation results indicated submicron-sized were unstable during Charpy impact loading. In contrast TWIP concept, analysis of geometrically necessary dislocati...

microstructural evolutions of twinning induced plasticity (twip) steel during tensile straining wereinvestigated by in situ sem observations. the results indicated that slip lines and mechanical twins aswell as surface relief were increased with increasing strain, resulting in a stepped surface. additionally,these deformation mechanisms could change the shape of each grain via shear and rotatio...

Aiming at overcoming the strength-ductility trade-off in structural Ti-alloys, a new family of TRIP/TWIP Ti-alloys was developed past decade (TWIP: twinning-induced plasticity; TRIP: transformation-induced plasticity). Herein, we study tunable nature deformation mechanisms with various TWIP and TRIP contributions by fine adjustment Zr content on ternary Ti-12Mo-xZr (x = 3, 6, 10) alloys. The mi...

High strength twinning induced plasticity (TWIP) steels have potential for applications in the automotive industry. However, they are prone to hydrogen embrittlement (HE) and galvanic corrosion. Here, we report on susceptibility towards HE oxidation of a model Fe 27Mn 0.3C (wt%) TWIP steel by atom probe tomography. We measured segregation oxygen at grain boundaries, which appears correlated wit...

Low stacking fault energy face centered cubic (FCC) materials contain characteristic defect structures. Stacking fault tetrahedral are one of those rare structures that occur under special experimental conditions. For the first time, stacking fault tetrahedral were observed in Fe-30Mn-3Al-3Si twinning induced plasticity (TWIP) steel. Their presence resulted from a quenching heat treatment.

Metal additive manufacturing has strongly gained scientific and industrial importance during the last decades due to the geometrical flexibility and increased reliability of parts, as well as reduced equipment costs. Within the field of metal additive manufacturing methods, selective laser melting (SLM) is an eligible technique for the production of fully dense bulk material with complex geomet...

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...

To meet the demand of 10% weight reduction goal for automotive steel, microstructure and mechanical properties Fe-18Mn-Al-C steel with different carbon aluminum contents were investigated under solid solution treatments, deformation mechanisms experimental steels elucidated. Aided by thermodynamic calculation, transmission electron microscopy (TEM) in situ scanning microscope (SEM) analysis, it...

Metallic materials, especially steel, underpin transportation technologies. High-manganese twinning induced plasticity (TWIP) austenitic steels exhibit exceptional strength and ductility from twins, low-energy microstructural defects that form during plastic loading. Their high-strength could help light-weighting vehicles, hence cut carbon emissions. TWIP are however very sensitive to hydrogen ...