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Meeting 2021 TMS Annual Meeting & Exhibition
Symposium 2021 Technical Division Student Poster Contest
Presentation Title Utilizing CALPHAD Methods to Determine Phases in a Compositionally Complex Fe-Cr-based Alloy
Author(s) Kaitlyn Paulsen, Alexandra Loumidis, Patrick Conway, Karen Privat, Kevin Laws, Lori Bassman
On-Site Speaker (Planned) Kaitlyn Paulsen
Abstract Scope Fe-Cr-based ferritic steels exhibit excellent corrosion resistance. However, their use and application are limited by the formation of a brittle sigma phase at intermediate temperatures. Prior experiments demonstrated that the addition of Mn and small amounts of Al eliminates the sigma phase for a specific range of compositions. In this work, extrapolating from binary and ternary systems, CALPHAD methods were used to explore the boundaries of the quaternary Fe-Cr-Mn-Al composition space for which sigma is eliminated. Results from ThermoCalc’s TCFE7 (Iron) and TCHEA4 (High Entropy Alloy) databases were cross-compared with one another and with experimental results. This work helps determine the applicability of ThermoCalc predictions for this compositionally complex system and is being utilized to refine further experiments.
Proceedings Inclusion? Undecided

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Utilizing Advanced Manufacturing for the Development of Advanced In-pile Sensors and Instrumentation
Utilizing CALPHAD Methods to Determine Phases in a Compositionally Complex Fe-Cr-based Alloy

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