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Improved Fatigue and Fracture Resistance of 22MnB5 Steels With Added Nb and Mo

The addition of Nb and Mo in 22MnB5 steels has proved to improve mechanical properties and hardenability. It is a good strategy to increase the applicability of hot-stamped products in parts with high mechanical requirements, such as those subjected to cyclic loading, i.e. the vehicle chassis parts. This paper shows the improved fatigue and fracture resistance of thick 22MnB5 plates (4.5 to 8mm thick) with added Nb and Mo. The fatigue resistance has been analyzed in the high cycle fatigue regime and is related to the fracture toughness in the frame of elastic-plastic fracture mechanics. Such an approach is presented as a tool to evaluate the effect of manufacturing processes like welding on the fatigue behaviour of high-strength steels.

DOI Number: 10.33313/512/B1002
Product:
2024 CHS2 Conference Proceedings
PR-512-B1002
Sergi Parareda, Daniel Casellas, Ed Juarez Mendes Taiss, Diego Tolotti de Almeida, David Frometa
May 27, 2024
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