Open AccessEffect of thermomechanical treatment on the microstructure and mechanical properties of a low-carbon low-alloy steel
Author(s) -
Anastasiia Dolzhenko,
Andrey Belyakov,
Rustam Kaibyshev
Publication year - 2021
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/1014/1/012007
Subject(s) - microstructure , materials science , ultimate tensile strength , elongation , alloy , toughness , metallurgy , izod impact strength test , tensile testing , composite material
The effect of thermomechanical treatment on the microstructure, tensile strength and impact toughness of low-carbon low-alloy steel is considered. The developed microstructure is characterized by grain elongation along the rolling direction. Both the yield strength and the ultimate tensile strength increase with a decrease in test temperature. The ultimate strength at room temperature is 797 MPa, and at 77 K the ultimate strength increases to 1198 MPa. The steel samples subjected to tempforming exhibit impact toughness of KCV = 410 J/cm 2 at room temperature. A decrease in the test temperature to 233 K leads to a slight decrease in the KCV value to 340 J/cm 2 . It should be noted that the impact specimens are not completely fractured even at a test temperature of 233 K, suggesting higher real values of impact toughness.