Abstract
The concepts of phase transformation theory can be exploited to design nanostructured steels that transform to bainite at temperatures as low as 150°C. The microstructure obtained is so refined that it is possible to achieve strength in excess of 2.5 GPa in a material that has considerable toughness (40 MPam1/2). Such a combination of properties has never been achieved before with bainite. A description of the characteristics and significance of this remarkable microstructure in the context of the mechanism of transformation is provided.
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Acknowledgements
The authors gratefully acknowledge the support of the Spanish Ministry of Science and Innovation for funding this research under the contract MAT2010-15330, respectively. Atom-probe tomography research (M.K.M.) was supported through a user project supported by ORNL’s Center for Nanophase Materials Sciences (CNMS), which is sponsored by the Scientific User Facilities Division, Office of Basic Energy Sciences, U.S. Department of Energy.
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Caballero, F.G., Garcia-Mateo, C. & Miller, M.K. Design of Novel Bainitic Steels: Moving from UltraFine to Nanoscale Structures. JOM 66, 747–755 (2014). https://doi.org/10.1007/s11837-014-0908-0
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DOI: https://doi.org/10.1007/s11837-014-0908-0