Investigation of the Kinetics of Fatigue Macrocracks Under Transverse Shear

We study the kinetics of shear macrocracks under the conditions of fatigue fracture by transverse shear of thermally hardened 65G steel with a troostite-sorbite structure for low-, middle-, and high-amplitude cyclic loads. We plot the kinetic diagrams of fatigue fracture with regard for the friction...

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Bibliographic Details
Published in:Materials science (New York, N.Y.) N.Y.), 2016-11, Vol.52 (3), p.349-356
Main Authors: Ivanyts’kyi, Ya. L., Lenkovs’kyi, T. M., Verhun, I. A., Shtayura, S. T.
Format: Article
Language:English
Subjects:
Characterization and Evaluation of Materials
Chemistry and Materials Science
Contact
Crack propagation
Cyclic loads
Deformation
Fatigue (materials)
Fatigue cracks
Fatigue failure
Fracture mechanics
Friction
Materials Science
Shear
Shear stress
Solid Mechanics
Sorbite
Steel structures
Structural Materials
Structural steels
Transverse shear
Troostite
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Summary:We study the kinetics of shear macrocracks under the conditions of fatigue fracture by transverse shear of thermally hardened 65G steel with a troostite-sorbite structure for low-, middle-, and high-amplitude cyclic loads. We plot the kinetic diagrams of fatigue fracture with regard for the friction of the faces of a shear crack within the range of its growth rates covering up to six orders of magnitude. On the basis of the constructed dependence, we determine the principal and additional characteristics of cyclic crack resistance. We also study the contact interaction of the faces of fatigue cracks and the fractographic features of fracture under the conditions of low- and high-amplitude deformation by cyclic transverse shear.
ISSN:1068-820X
1573-885X
DOI:10.1007/s11003-016-9963-8