Abstract
The influence of Cr and N additions on the mechanical properties of a Fe-Mn-C steel was investigated. The chemical composition was found to have a pronounced effect on the strain-hardening behavior, due to the strain-induced sequence of the γ → ▓ → α′ martensitic transformations. It was found that Cr and N suppress this transformation sequence. At Cr levels higher than 7.5 mass pct, no α′ martensite was formed, which led to a pronounced improvement of the ductility. The differences in transformation behavior can be attributed to the change in the intrinsic stacking-facult energy (ISFE): in the compositional range studied, Cr and N additions cause an increase of the ISFE.
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Bracke, L., Mertens, G., Penning, J. et al. Influence of phase transformations on the mechanical properties of high-strength austenitic Fe-Mn-Cr steel. Metall Mater Trans A 37, 307–317 (2006). https://doi.org/10.1007/s11661-006-0002-5
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DOI: https://doi.org/10.1007/s11661-006-0002-5