5th International High Manganese Steel Conference - HMNS 2022

Multiphase medium Manganese TRIP steels offer good combinations of high strength and high ductility and can be designed to be used in automotive industry for light weighting purposes. However, the deformation-driven martensitic transformation associated with the TRIP effect strongly deteriorates the materials’ resistance against hydrogen embrittlement (HE). We studied the hydrogen related...

Hydrogen embrittlement of high strength steel is one of the critical issue when attempting to prolong the material life for a practical use. Because of this reason, macro/microstructural design for a prevention of hydrogen invasion is important to enhance hydrogen embrittlement resistance of materials. In is study, ultrasonic nanocrystalline surface modification (UNSM) treatment at elevated...

The global formability of sheet materials corresponds to the ability to undergo uniform plastic deformation without the formation of a localized neck, whereas the local formability addresses the ability to undergo plastic deformation in a local area without fracture. Both the local and the global formability are therefore important properties that can become limiting factors for the...

Driven by the increasing demand for passenger safety and weight reduction in the automotive industry, advanced Fe-Mn-Al-C alloys with low density and specific high strength have gained great attention in recent decades. Unfortunately, these materials are prone to hydrogen embrittlement (HE) which impedes their further application. Here we focus on a high-Mn and high-Al lightweight steel with...

Previously, some of the problems of cracking as well as edge cracking during two phase hot rolling (e.g. duplex stainless, high Mn steels) have been attributed to the effect of hot ductility, difference of flow behaviour between the different phases. There is limited work and knowledge regarding the exact cracking mechanism as a function of rolling pass number, temperature, mean flow stress or...

Austenitic high manganese lightweight steels emerge as a potential candidate for structural applications in the automotive industry. The precipitation of κ-carbides in these materials upon age hardening treatment offers a great combination of strength, ductility and toughness, while the high Al content (8-11 wt. %) reduces the specific weight. In general, the size of κ-carbides at grain...