Fatigue strength, laws of inelastic deformation, and microcrack nucleation in steel 15Kh2MFA
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A study is made of steel 15Kh2MFA and its resistance to low-cycle deformation, inelastic characteristics, and mechanical properties, as well as the parameters of surface microcracks formed after cyclic loading of specimens of this material. The steel is studied in two states: initial and embrittled. It is established that, with allowance for the change in the non-dangerous component of energy, the total energy of fatigue fracture is invariant relative to the number of cycles to crack nucleation. It is shown that increases in the number of loading cycles and total energy dissipation are accompanied by an increase in the mean length and density of surface macrocracks and a decrease in the mean distance between them.
KeywordsFatigue Mechanical Property Total Energy Energy Dissipation Cyclic Loading
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