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Simulation of Solidification, Microsegregation, and Heat Treatment of Cr-Based Fe–xMn–7.5Al–1.0C Lightweight Steels

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Abstract

In this study, we simulated the solidification behavior, microsegregation, and heat treatment in Fe–xMn–7.5Al–5Cr–1.0C lightweight steels using the CALculation of PHAse Diagrams method. The solidification paths and microsegregation of these steels were calculated with the Scheil-Gulliver model and equilibrium calculator in the Thermo-Calc® software. At the same time, thermodynamic calculations predicted heat-treatment temperatures for different steels. The transformation path of the Fe–xMn–7.5Al–5Cr–1.0C (x = 18 and 20 wt.%) lightweight steels is as following: liquid → liquid + δ-ferrite → δ-ferrite + γ-austenite → γ-austenite → γ-austenite + M7C3, according to equilibrium and Scheil’s calculations. In case of 25 wt.% Mn steel, the two-phase region of δ-ferrite and γ-austenite is absent in the transition path. The segregation behaviour of solute elements in the liquid, ferrite, and austenite phases were predicted using the Scheil model. The heat treatment temperature for single-phase formation is expected to be between 900 °C and 1030 °C.

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Acknowledgements

The authors express their gratitude to the Ministry of Education, Government of India, and Indian Institute of Technology Jodhpur for the software facility and financial support.

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  1. Department of Metallurgical and Materials Engineering, Indian Institute of Technology Jodhpur, Karwar, Jodhpur, Rajasthan, 342030, India

    Swamy Shetti, Appala Naidu Gandi & Sk Md Hasan

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  1. Swamy Shetti
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Correspondence to Swamy Shetti.

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Shetti, S., Gandi, A.N. & Hasan, S.M. Simulation of Solidification, Microsegregation, and Heat Treatment of Cr-Based Fe–xMn–7.5Al–1.0C Lightweight Steels. Trans Indian Inst Met (2024). https://doi.org/10.1007/s12666-023-03231-6

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