Open AccessThe effect of low temperatures on the operability of products 20GL steel
Author(s) -
А. А. Хлыбов,
Yu. G. Kabaldin,
М. С. Аносов,
D. A. Ryabov,
V. I. Naumov,
V. I. Sentyureva
Publication year - 2020
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1431/1/012063
Subject(s) - brittleness , operability , materials science , metallurgy , atmospheric temperature range , scanning electron microscope , transition temperature , composite material , thermodynamics , condensed matter physics , physics , engineering , reliability engineering , superconductivity
The influence of low temperatures on the cold brittleness of 20GL steel is considered. Tests were carried out on the impact strength of samples of 20GL steel in the temperature range from t = - 60 ° C to a temperature of t = 20 ° C. Fractographic studies of fractures were carried out using optical and electron microscopy. The studies were carried out after normalization, as well as after thermocyclic treatment. The research results showed that thermocyclic treatment leads to an increase in strength characteristics, grain refinement. At the same time, the temperature of the brittle-viscous transition is slightly shifted to the region of positive temperatures.