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A highly wear resistant nanostructured bainitic steel with accelerated transformation kinetics

by Rangasayee Kannan, Yiyu Wang, Tomas Grejtak, Bryan Lim, Peeyush Nandwana
Publication Type
Journal
Journal Name
Journal of Materials Research and Technology
Publication Date
Page Numbers
6797 to 6803
Volume
35

A coupled Calculation of Phase Diagrams (CALPHAD), machine learning, and data mining approach was used to design a new, highly wear-resistant nanostructured bainitic steel. Arc melting of the designed compositions, dilatometry, and advanced microscopy indicate that the designed steel had a nanoscale dual-phase structure of ferrite and austenite (approximately 50 nm) with kinetics 7x faster for the onset of bainite and 2x faster for complete transformation. Under dry sliding conditions using the current state-of-the-art AISI 52100 bearing steel as the counter sample, the designed steel little to no wear, indicating its potential for applications in high-wear service conditions.