5th International High Manganese Steel Conference - HMNS 2022

The growing demands of weight saving, emission reduction and passenger safety in the automotive industry have promoted new concepts for medium-Mn steels design to achieve an excellent combination of high strength and superior ductility. Tailoring the microstructural evolution for mechanical enhancement requires deep understanding of austenite reversion mechanism. The previous research work on...

In the last decade, the academic community extensively researched medium-Mn steels. This steel class has proved their position as one of the possible successor to classic AHSS due to excellent mechanical properties paired with still reasonable alloying costs. Nevertheless, several technical issues have to be resolved in order to enable a successful application of medium-Mn steels in a vehicle,...

The effects of starting microstructure and intercritical annealing (IA) temperature on the phase transformation kinetics and microstructural evolution of a prototype Fe-0.15C-5.56Mn-1.1Si-1.89Al medium-Mn third-generation advanced high strength steel (3G AHSS) were determined. The starting microstructures comprised i) an as-received cold rolled (CR) microstructure containing a significant...

The development of new-generation AHSS steels requires a careful optimization of their processing parameters. In the case of intercritically annealed medium-Mn steels, parameters as the initial microstructure, annealing time and temperature and cooling and heating rates are paramount in controlling the final response of the microstructure.
The present research concerns with the effect that...

Medium-Mn steels belonging to the third generation of Advanced High Strength Steels (AHSS) are the most perspective lightweight materials for body-in-white automotive parts. These steels containing between 3 and 12 wt.% of Mn show a beneficial combination of high strength at sufficient ductility. Their excellent mechanical properties are attributed to the substantial fraction of metastable...

Application of the double soaking treatment to medium-Manganese (Mn) steels has been shown to result in impressive combinations of tensile strength and uniform elongation. The two-step double soaking heat treatment is intended to produce an austenite-martensite microstructure by intercritical annealing followed by secondary soaking. The intercritical annealing step serves to partition Mn from...

Segregation engineering by controlling the solute decoration state of certain interfaces has recently been proposed as a new method to tailor mechanical properties in metallic materials. Despite the advancements in thermodynamic understanding of grain boundary segregation, the segregation behaviour at phase boundary in multiphase steels has largely remained untouched. Such information is...