A Study of Plastic Deformation of 08G2B Steel Before and at the Yield Plateau by Digital Image Correlation Technique. Part 1. Formation of Plastic and Elastic Deformation Waves

• Published in: Metal science and heat treatment Vol. 61; no. 5-6; pp. 274 - 279
• Main Authors: Farber, V. M., Polukhina, O. N., Vichuzhanin, D. I., Khotinov, V. A., Smirnov, S. V.
• Format: Journal Article
• Language: English
• Published: New York Springer US 01-09-2019; Springer; Springer Nature B.V
• Subjects: Aging (metallurgy); Characterization and Evaluation of Materials; Chemistry and Materials Science; Classical Mechanics; Cooling; Digital imaging; Elastic deformation; Elastic waves; Engineering Thermodynamics; Heat and Mass Transfer; Heat treatment; Materials Science; Metallic Materials; Plastic deformation; Plastic flow; Tensile deformation; tensile curve; digital image correlation technique; plastic flow channels; displacement field
• ISSN: 0026-0673; 1573-8973
• DOI: 10.1007/s11041-019-00416-z

Specifics of plastic flow during tensile deformation of the samples of ultra-fine grained steel (08G2B) susceptible to deformation aging have been studied by using a digital image correlation technique. The heat treatment of steel was performed according to the following schemes: 1) heating to 250°C, soaking for 30 min, and cooling in air; and 2) heating to 680°C without soaking, and cooling in air. The standard flat samples were subjected to tensile testing at a constant deformation rate. It was shown that the Luders deformation in the tensile-loaded samples is concentrated in the flow channels formed at the stage of macro-elastic deformation and genetically connected with the maxima of the standing elastic wave.