The structural-phase state changes under the pulse current influence on the fatigue loaded steel

O. V. Sosnin, A. V. Gromova, E. Yu Suchkova, E. V. Kozlov, Yu F. Ivanov, V. E. Gromov

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

Structure and phase transformations in Fe-0.6C-1Mn-2Si steel subjected to multicyclic fatigue tests under normal conditions and with intermediate electrostimulation are investigated by the methods of metallography of etched microsections and scanning and transmission electron diffraction microscopy of thin foils and carbon replica. It is demonstrated that fatigue failure under normal loading is preceded by complete dissolution of initial cementite particles with carbon localized on structural defects (dislocations, subboundaries, and boundaries), micropores, and microcracks. Electrostimulation, promoting the relaxation of stress concentrators through dissolution of particles localized on the grain boundaries and the state change of the interphase boundaries between the matrix and second-phase particle, causes the mean and maximum subcritical crack length to increase together with the thickness of the sample layer involved in the strain of the material and the zone of fatigue crack growth. This is accompanied by a significant increase in the operating lifetime of the material.

Original languageEnglish
Pages (from-to)1221-1226
Number of pages6
JournalInternational Journal of Fatigue
Volume27
Issue number10-12
DOIs
Publication statusPublished - Oct 2005

Fingerprint

Steel
Fatigue
Dissolution
Carbon
Fatigue of materials
Metallography
Microcracks
Fatigue crack propagation
Electron diffraction
Metal foil
Microscopic examination
Concentrator
Grain boundaries
Fatigue Crack Growth
Phase Transformation
Phase transitions
Grain Boundary
Replica
Cracks
Dislocation

ASJC Scopus subject areas

  • Mechanical Engineering
  • Mechanics of Materials

Cite this

The structural-phase state changes under the pulse current influence on the fatigue loaded steel. / Sosnin, O. V.; Gromova, A. V.; Suchkova, E. Yu; Kozlov, E. V.; Ivanov, Yu F.; Gromov, V. E.

In: International Journal of Fatigue, Vol. 27, No. 10-12, 10.2005, p. 1221-1226.

Research output: Contribution to journalArticle

Sosnin, O. V. ; Gromova, A. V. ; Suchkova, E. Yu ; Kozlov, E. V. ; Ivanov, Yu F. ; Gromov, V. E. / The structural-phase state changes under the pulse current influence on the fatigue loaded steel. In: International Journal of Fatigue. 2005 ; Vol. 27, No. 10-12. pp. 1221-1226.
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