Abstract A medium Mn steel (MMS) was cast by employing a vacuum induction furnace. After that, the hot rolled (HR) in order to achieve final thickness of 1.4 mm. The microstructure sheet found be composed martensite and little amount austenite, Ultimate Tensile Strength (UTS this processing condition close 1600 MPa negligible elongation found. An intercritical annealing (IA) heat treatment appl...

TRIP-assisted CMnSiAl steels with a fully martensitic initial microstructure have been studied in order to investigate the effect of partial substitution Si by Al. The steel was fabricated casting sand mold, hot forged, homogenizing, rolling, cold intercritical annealing, and finally, an isothermal bainitic treatment. During annealing at 1023 K (750 °C) for 420 s, matrix consisting 50% proeutec...

A new combination of factors enhancing the stabilization austenite, including pre-existed austenite among quenched martensite, prior deformation, and partitioning at high temperatures is employed to create a multi-component refined microstructure in medium Mn steel (Fe–4Mn–0.31C–2Ni–0.5Al–0.2Mo, wt.%). The evolution phase fraction during processing are systematically investigated using various ...

Thermal treatments and thermo-mechanical processing routes were applied on a conventional structural steel (st37 steel: 0.12C-1.11Mn-0.16Si) for improvement of tensile properties and enhancement of work-hardening behavior. Full annealing resulted in a sheet with coarse ferrite grains and pearlite colonies arranged alternatively in distinct bands, which showed high ductility, low strength, and t...

Abstract. Ultra-high-strength-steel parts produced by press hardening are widely used in the automotive sector for lightweight construction and passenger safety applications. Medium-manganese-steels (MMnS) currently investigated as an alternative to boron-manganese steels. Their favorable mechanical properties of high strength ductility after quenching often based on rather complex heat treatme...