About this Abstract |
Meeting |
2025 TMS Annual Meeting & Exhibition
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Symposium
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Phase Transformations and Microstructural Evolution
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Presentation Title |
Investigation of microstructural evolution and mechanical behaviour of low carbon ‘Nb’-added micro alloyed steel developed through quenching and partitioning method |
Author(s) |
SK MD Arif, Durbadal Mandal, Himadri Nandan Bar |
On-Site Speaker (Planned) |
SK MD Arif |
Abstract Scope |
This study underscores the substantial impact of Quenching and Partitioning (Q&P) heat treatment on steel's microstructure and mechanical properties. Optical microscopy revealed a martensitic structure with retained austenite in Q&P treated samples, confirmed by XRD analysis. The highest hardness occurred at 250°C, showcasing this temperature's effectiveness in optimizing mechanical properties. As temperatures rose to 350°C and above, hardness decreased, indicating a temperature-sensitive response. Tensile testing demonstrated higher ultimate tensile strength (UTS) and yield strength (YS) in Q&P treated steels compared to the as-received sample. The 250°C Q&P treated sample exhibited a favourable combination of strength and ductility, with a UTS of 800 MPa, YS of 687 MPa, and 20% elongation. This balance is vital for applications needing high strength and adequate ductility. Overall, the Q&P process significantly enhances steel hardness and strength while maintaining acceptable ductility, particularly at 250°C. Precise temperature control during Q&P is essential for optimizing mechanical performance. |
Proceedings Inclusion? |
Planned: |
Keywords |
Characterization, Mechanical Properties, Phase Transformations |