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- W4306920210 abstract "Obtaining a desired quantity of retained austenite (RA) in press-hardened steels (PHSs) with a martensitic matrix is of great interest for the performance of safety critical components in vehicle bodies, as it improves the ductility/toughness without compromising strength. In this study, RA in a 1.7 GPa−PHS was stabilized via local chemical heterogeneity associated with Cr-enriched carbides. The Cr-rich carbide was introduced as a temporary reservoir of Cr and C into the pre-hot stamping microstructure by an annealing treatment. During the subsequent austenitization in hot stamping, the slow decomposition kinetics of Cr-rich carbide contributed to localized enrichment of Cr and C, which stabilized the austenite and resulted in a significant amount of RA with a core-shell structure after die quenching. Finally, sufficient RA ensured that the 1.7 GPa−PHS had a total elongation of ∼9.3%, which is about 43% higher than that of the 1.5 GPa−PHS grade 22MnB5 (∼6.5%)." @default.
- W4306920210 created "2022-10-21" @default.
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- W4306920210 date "2023-02-01" @default.
- W4306920210 modified "2023-10-16" @default.
- W4306920210 title "Cr-enriched carbide induced stabilization of austenite to improve the ductility of a 1.7 GPa−press-hardened steel" @default.
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- W4306920210 doi "https://doi.org/10.1016/j.scriptamat.2022.115108" @default.
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