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 language | English |
|---|---|
| Pages (from-to) | 1221-1226 |
| Number of pages | 6 |
| Journal | International Journal of Fatigue |
| Volume | 27 |
| Issue number | 10-12 |
| DOIs | |
| Publication status | Published - Oct 2005 |
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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 journal › Article
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TY - JOUR
T1 - The structural-phase state changes under the pulse current influence on the fatigue loaded steel
AU - Sosnin, O. V.
AU - Gromova, A. V.
AU - Suchkova, E. Yu
AU - Kozlov, E. V.
AU - Ivanov, Yu F.
AU - Gromov, V. E.
PY - 2005/10
Y1 - 2005/10
N2 - 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.
AB - 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.
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U2 - 10.1016/j.ijfatigue.2005.07.010
DO - 10.1016/j.ijfatigue.2005.07.010
M3 - Article
VL - 27
SP - 1221
EP - 1226
JO - International Journal of Fatigue
JF - International Journal of Fatigue
SN - 0142-1123
IS - 10-12
ER -