Effect of High-Temperature Tempering on the Deformation Behavior of 38G2F Steel

• Published in: Metal science and heat treatment Vol. 66; no. 5-6; pp. 323 - 329
• Main Authors: Khotinov, V. A., Ovsyannikov, A. B., Kuz’mina, A. V., Farber, V. M.
• Format: Journal Article
• Language: English
• Published: New York Springer US 01-09-2024; Springer Nature B.V
• Subjects: Characterization and Evaluation of Materials; Chemistry and Materials Science; Classical Mechanics; Deformation analysis; Deformation effects; Engineering Thermodynamics; Heat and Mass Transfer; Heat resistant steels; High temperature; Materials Science; Mechanical properties; Mechanisms of Plastic Deformation and Fracture; Metallic Materials; Strain analysis; Stress-strain curves; Stress-strain relationships; Structural steels; Tempering; stress-strain diagrams; density of dislocations; digital image correlation method; structural steels; lath martensite; subgrains; uniform stage of deformation; Lüders deformation
• ISSN: 0026-0673; 1573-8973
• DOI: 10.1007/s11041-024-01054-w

We study the structure and mechanical properties of 38G2F structural steel after quenching and high-temperature isothermal tempering of different durations. By analyzing the stress-strain diagrams in conventional and true coordinates, we reveal specific features of the deformation behavior of samples on the yield plateau and in the uniform stage of deformation. We also analyze the influence of the distribution of strain component ε
yy
along the working part of the sample on the variations of strength and plastic characteristics of steel in different stages/periods of tension.