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Graded Microstructure Preparation in Austenitic Stainless Steel during Radial-Shear Rolling

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Metallurgist Aims and scope

This work is devoted to studying the possibility of forming a graded structure in 08Kh18N10T stainless austenitic steel using radial-shear rolling. Experimental studies show that an ultrafine-grained structure extends into the bar from its surface to a depth of at least a quarter of the bar radius. A transition zone is located in the area between 0.5R and 0.25R of the bar cross section. Due to structural heterogeneity in the bar cross section there is an increase in microhardness by more than a factor of two from the initial value of 152 to 320HV in surface layers and a smooth drop by 10.2% in microhardness within the central area of a bar. This points to a graded nature of the structure formed in the bars of 08X18N10T steel after radial-shear rolling. A study of mechanical properties shows an increase in the tensile strength by about a factor of two to 938 MPa and a reduction in elongation to 24% in the peripheral zone and to 19% in the axial zone.

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Authors and Affiliations

  1. Rudnyi Industrial Institute, Rudnyi, Kazakhstan

    S. N. Lezhnev, A. B. Naizabekov, E. A. Panin & I. E. Volokitina

  2. Nazarbaev University, Nur-Sultan, Kazakhstan

    A. S. Arbuz

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  1. S. N. Lezhnev
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  2. A. B. Naizabekov
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  3. E. A. Panin
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  4. I. E. Volokitina
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  5. A. S. Arbuz
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Correspondence to S. N. Lezhnev.

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Translated from Metallurg, Vol. 64, No. 11, pp. 46–54, November, 2020.

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Lezhnev, S.N., Naizabekov, A.B., Panin, E.A. et al. Graded Microstructure Preparation in Austenitic Stainless Steel during Radial-Shear Rolling. Metallurgist 64, 1150–1159 (2021). https://doi.org/10.1007/s11015-021-01100-5

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  • DOI: https://doi.org/10.1007/s11015-021-01100-5

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