|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Phase Transformations and Microstructural Evolution
||Atomistic Modeling of η-Fe2C Carbide Precipitation Kinetics in Fe-C System
||Helena Zapolsky, Felix Schwab, Renaud Patte, Gilles Demange, Armen Khachaturyan
|On-Site Speaker (Planned)
Carbon steels are in widespread use in industry due to their beneficial combination of properties such as strength and hardness.These steels are Fe-C interstitial solid solution based on the low temperature bcc and high temperature fcc phase. Among its various forms, martensite obtained by quenching the fcc austenite is the one with the highest strength. However, iron-carbon martensite is not stable at room temperature but undergoes aging resulting in a re-distribution of carbon atoms, which form carbon-rich zones. 𝜂-Fe2C carbide is transition compound which observed in martensite during the initial stages of tempering. It crystal structure is well documented , however, precipitation kinetics pathway continues to be an open question.
In this study, the Atomic Density Function theory has been employed to model the low temperature kinetics of carbon redistribution in martensite. Based on the simulation results, the transformation path between freshly formed martensite and 𝜂-Fe2C carbide is discussed.
||Phase Transformations, Computational Materials Science & Engineering, Iron and Steel