Abstract
Advanced high-strength steels go through complex heat treatment processes with the goal of retaining austenite to enhance the mechanical properties. Martensite start temperature predictions are generally based on bulk composition when designing heat treatments, so compositional heterogeneities are not considered. Here, the effects of compositional heterogeneities on retained austenite fractions in a quenching and partitioning steel are investigated. The results show that Mn banding from solidification can be used to change retained austenite fractions.
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Acknowledgements
The authors would like to acknowledge NSF Award 1752530, Career: Controlling Austenite Stability and Response During Deformation of Advanced High-Strength Steels, through the Division of Civil, Mechanical and Manufacturing Innovation for their support. Additionally, the authors would like to thank Dr. Doug Smith, Dr. Christopher Finfrock, and Dr. Diptak Bhattacharya for their useful conversations and insights into this work.
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MT contributed to conceptualization, formal analysis, investigation, writing—initial draft, and visualization; AC contributed to conceptualization, funding acquisition, and supervision; and KC contributed to conceptualization, funding acquisition, and supervision.
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Thrun, M., Clarke, A. & Clarke, K. Manipulating Retained Austenite Fraction and Stability With Controlled Chemical Heterogeneities in Q&P Steels. Metall Mater Trans A 55, 26–30 (2024). https://doi.org/10.1007/s11661-023-07233-3
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DOI: https://doi.org/10.1007/s11661-023-07233-3