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

Lezhnev S.N. Naizabekov A.B. Panin E.A. Volokitina I.E. Arbuz A.S.
March 2021 Springer

Metallurgist
2021 #64 Issue 11-12 1150 - 1159 pp.

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.

austenitic stainless steel , graded microstructure , mechanical properties , radial-shear rolling

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Rudnyi Industrial Institute, Rudnyi, Kazakhstan
Nazarbaev University, Nur-Sultan, Kazakhstan

Rudnyi Industrial Institute
Nazarbaev University

10 лет помогаем публиковать статьи Международный издатель

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