 | | Mechanics of Solids
A Journal of Russian Academy of Sciences | | Founded
in January 1966
Issued 6 times a year
Print ISSN 0025-6544
Online ISSN 1934-7936 |
Archive of Issues
| Total articles in the database: | | 12977 |
| In Russian (Èçâ. ÐÀÍ. ÌÒÒ): | | 8096
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| In English (Mech. Solids): | | 4881 |
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| K.V. Kukudzhanov, G.R. Khalikova, E.A. Korznikova, A.V. Chentsov, and S.V. Dmitriev, "Healing of Long Fatigue Cracks in Steel Plates by High-Density Current Pulses," Mech. Solids. 59 (5), 3223-3234 (2024) |
| Year |
2024 |
Volume |
59 |
Number |
5 |
Pages |
3223-3234 |
| DOI |
10.1134/S0025654424605949 |
| Title |
Healing of Long Fatigue Cracks in Steel Plates by High-Density Current Pulses |
| Author(s) |
K.V. Kukudzhanov (Ishlinsky Institute for Problems in Mechanics of the Russian Academy of Sciences, Moscow, 119526 Russia, kconstantin@mail.ru)
G.R. Khalikova (Institute for Metals Superplasticity Problems of Russian Academy of Sciences, Ufa, 450001 Russia; Ufa State Petroleum Technological University, Ufa, 450064 Russia, gulnara.r.khalikova@gmail.com)
E.A. Korznikova (Institute for Metals Superplasticity Problems of Russian Academy of Sciences, Ufa, 450001 Russia; Ufa University of Science and Technology, Ufa, 450076 Russia, elena.a.korznikova@gmail.com)
A.V. Chentsov (Ishlinsky Institute for Problems in Mechanics of the Russian Academy of Sciences, Moscow, 119526 Russia; Moscow State University of Civil Engineering, Moscow, 129337 Russia, iuniõ@yandex.ru)
S.V. Dmitriev (Institute for Metals Superplasticity Problems of Russian Academy of Sciences, Ufa, 450001 Russia;Ufa State Petroleum Technological University, Ufa, 450064 Russia;Institute of Molecule and Crystal Physics, UFRC of Russian Academy of Sciences, Ufa, 450054 Russia, dmitriev.sergey.v@gmail.com) |
| Abstract |
The healing of cracks in metals and alloys by means of exposure to strong pulsed electromagnetic fields is of considerable interest, since it allows to increase the reliability and service life of
structural materials and products made of them. In spite of practical importance, the methodology of
selection of the parameters of the electric pulse treatment, which would allow to heal the defects, has
not been developed yet. Healing of long macrocracks in thin plates by welding of their edges under
electric pulse action is of particular difficulty. The present work is devoted to the study of the possibility of selecting the parameters of electric pulse treatment for such a case. The mechanism of healing
of macrocracks in flat specimens is considered. The proposed multistage method of electric pulse
treatment allowed to heal a significant length of macrocrack in a steel plate. The conducted studies of
microstructure of cross-sections of AISI201 stainless steel samples confirm that healing occurs by the
mechanism of welding of crack edges by molten material. The electric pulse creates at the tip of the
crack significant compressive stress and high temperature, causing the melting of steel. The experiments showed significant heterogeneity of healing along the macrocrack front and in depth, however,
the quality of healing improved with increasing distance from the plate surface. In the healed region
along the crack edges, a zone with elongated grains surrounding a central zone with equiaxed grains is
observed, which reflects the kinetics of cooling of the molten region of the specimen exposed to the
current pulse. |
| Keywords |
crack healing, steel, high density electric pulse |
| Received |
24 October 2024 | Revised |
10 November 2024 | Accepted |
11 November 2024 |
| Link to Fulltext |
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