Structural Aspects of Zones of Plastic Strain. Part III. Effect of Thermal Stability of Bands of Adiabatic Shear

The structure of initially high-tempered steel 09G2S (quenched and tempered at 650°C) is studied quantitatively inside the zone of plastic strain formed by the force impact of the hammer of the impact machine under dynamic three-point bending. After the impact tests, the specimen exhibits features of plastic flow of the material and bands of adiabatic shear. Additional annealing at 600°C with a hold for from 7.5 to 24 h causes stage evolution of the structure of the bands.