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The Role of Hot Deformation Texture on Dynamic Transformation of Austenite to Ferrite in a 9%Cr Alloy Steel

  • New Frontiers in Physical Metallurgy of Steels
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Abstract

The dynamic transformation of austenite to ferrite occurs in various steels and has technological implications for grain refinement. Despite significant research, ambiguities persist about the nature of this transformation, its driving force, and the influencing parameters. In the current work, these outstanding issues are addressed through a study of hot deformation textures associated with the dynamic transformation in a 9%Cr alloy steel. It is found that hot deformation textures of the parent and daughter phases contain crucial information about the nature of the transformation, and it is shown that the dynamic transformation is driven by stress rather than strain. Further, it bears signs of displacive rather than diffusional transformation and can be controlled through strain rate.

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Acknowledgements

The authors gratefully acknowledge support from Indira Gandhi Centre for Atomic Research, Kalpakkam, Department of Atomic Energy, Government of India.

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Authors and Affiliations

  1. Metallurgy and Materials Group, Indira Gandhi Centre for Atomic Research, Kalpakkam, India

    B. Aashranth & Dipti Samantaray

  2. Indian Institute of Science, Bangalore, India

    B. Aashranth, Gyan Shankar & Satyam Suwas

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  1. B. Aashranth
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Correspondence to Satyam Suwas.

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Aashranth, B., Shankar, G., Samantaray, D. et al. The Role of Hot Deformation Texture on Dynamic Transformation of Austenite to Ferrite in a 9%Cr Alloy Steel. JOM 74, 2377–2385 (2022). https://doi.org/10.1007/s11837-022-05279-z

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