In this investigation a new low carbon and low alloy (LCLA) (Third generation AHSS) steel with exceptional combination of yield strength and fracture toughness has been developed. The steel has been processed using a novel two step austempering process. The investigation also examined the influence of a two-step austempering process on the microstructure and mechanical properties of this steel. Test results show that by two-step austempering process significant improvement in yield strength and fracture toughness can be obtained in this steel.
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