High Mn steels is a new type of structural steels, characterised by both high strength and superior formability. The one of this is TWIP steel offers an remarkable opportunity to adjust the mechanical properties modifying the strain hardening. These steel features can therefore lead to a lightweighting of steel components and a reduction of material consumption. These advantages are the key to changing the approach in the design of steel components which emphasise a reduction of fuel consumption as well as the gas emissions. The present paper deals selected aspects of the microstructural effects observed in the high strength TWIP steels which accompany deformation processes with a special emphasis its comparing for two grades steel with different carbon and silicone content.Keywords: AHSS steels, compression, deformation, microstructure
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