The texture evolution of modified 12%Cr steel in high-temperature compression was investigated under a 10, 25, 35, and 50% reduction at 1150°C by using Gleeble-1500 D thermal simulation machine. Electron backscattering diffraction analysis showed that the texture of modified 12%Cr steel varied within α, γ, and ε and Goss fibers coexisting to γ and ε , then to α and ε , with the {hkl} <111> orientation always existing in compression. Recrystallization nuclei contribute to γ-fiber strengthening due to their high-energy mechanism. First activated. α-fibers can be consolidated owing to the interaction of deformation and recrystallization. In the compression procedure of an ultrasupercritical high-pressure rotor made of modified 12%Cr steel, the deformation should be controlled under the recrystallization activation energy of α-fibers to obtain the microstructure featured by the γ-fiber recrystallization texture, and vice versa.
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Acknowledgments
The paper was financially supported by the China Scholarship Council Fund (grant No. 201608140160). We also thank Professor Zhengyi Jiang of the University of Wollongong, Australia, for the supervising the manuscript preparation.
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Translated from Problemy Prochnosti, No. 4, pp. 60 – 69, July – August, 2020.
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Zhang, X.Z., Li, Y.J. Texture Evolution of Modified 12%Cr Steel in High-Temperature Compression. Strength Mater 52, 548–555 (2020). https://doi.org/10.1007/s11223-020-00206-6
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DOI: https://doi.org/10.1007/s11223-020-00206-6