Nucleation and initiation of cracks under high-cycle fatigue in the EP679 maraging steel

The features of fatigue crack nucleation and initiation in prismatic samples with a sharp Charpy-type notch made of the EP679 steel during multicycle fatigue tests are studied. Using speckle images, it is shown that, before a crack starts at the notch top, a zone of plastic deformation appears, with...

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Bibliographic Details
Main Authors: Vladimirov, A. P., Kamantsev, I. S., Drukarenko, N. A., Gladkovsky, S. V., Bukhvalov, A. B., Khudorozhkova, Yu. V., Cheremitsina, E. R., Gorkunov, E. S.
Format: Conference Proceeding
Language:English
Subjects:
Aging (materials)
Crack initiation
Crack propagation
Fatigue cracks
Fatigue failure
Fatigue tests
Fracture mechanics
High cycle fatigue
Impact strength
Impact tests
Maraging steels
Metal fatigue
Nucleation
Plastic deformation
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Summary:The features of fatigue crack nucleation and initiation in prismatic samples with a sharp Charpy-type notch made of the EP679 steel during multicycle fatigue tests are studied. Using speckle images, it is shown that, before a crack starts at the notch top, a zone of plastic deformation appears, with a shape depending on the material aging temperature. The dependences of the crack length on the number of loading cycles obtained immediately after the crack start are given.
ISSN:0094-243X
1551-7616
DOI:10.1063/1.5135143