 | | 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: | | 12854 |
| In Russian (Èçâ. ÐÀÍ. ÌÒÒ): | | 8044
|
| In English (Mech. Solids): | | 4810 |
|
| << Previous article | Volume 46, Issue 6 / 2011 | Next article >> |
| V.N. Kukudzhanov and A.V. Kolomiets-Romanenko, "A Model of Thermoelectroplasticity of Variations in the Mechanical Properties of Metals Based on Defect Structure Reorganization under the Action of Pulse Electric Current," Mech. Solids. 46 (6), 814-827 (2011) |
| Year |
2011 |
Volume |
46 |
Number |
6 |
Pages |
814-827 |
| DOI |
10.3103/S0025654411060021 |
| Title |
A Model of Thermoelectroplasticity of Variations in the Mechanical Properties of Metals Based on Defect Structure Reorganization under the Action of Pulse Electric Current |
| Author(s) |
V.N. Kukudzhanov (Ishlinsky Institute for Problems in Mechanics, Russian Academy of Sciences, pr-t Vernadskogo 101, str. 1, Moscow, 119526 Russia, kukudz@ipmnet.ru)
A.V. Kolomiets-Romanenko (Ishlinsky Institute for Problems in Mechanics, Russian Academy of Sciences, pr-t Vernadskogo 101, str. 1, Moscow, 119526 Russia, kolomiets@ipmnet.ru) |
| Abstract |
We consider variations in the mechanical properties of prestrained samples made of metallic materials with defects like microcracks and micropores under the action of pulse high-energy electric currents of certain intensity and duration. It was experimentally shown [1-5] that the treatment with a high-energy electromagnetic field of a prestretched sample with defects like microcracks that are located normally to the sample tension axis increases the sample limit plastic strain, which simplifies the treatment of hard-to-deform alloys in various technological processes. We consider a slow quasi-stationary process of thermal-electric treatment of samples, which permits obtaining materials with desired mechanical properties including samples with a high limit plastic strain.
We propose a thermoelectroplastic model of a material which takes account of the defect structure changes arising under the action of an electromagnetic field and develop a method for solving this problem by a direct numerical simulation based on the use of representative finite elements containing defects of the required type.
It is shown that, under the action of electric current, a nonhomogeneous temperature field with temperature localization arises near microcracks in the sample, and this leads to the "collapse" of defects and, as a consequence, to hardening of the material. On the other hand, the material melting and pore formation occur because of the temperature localization at the microcrack ends. An increase in the porosity results in a decrease in the nominal yield strength and an increase in the material limit plasticity. The mechanical properties obtained under such a reorganization of the defect structure significantly vary depending on the parameters of the pulse electric current and, hence, can be controlled.
The revealed mechanism of defect structure reorganization under the action of a thermal-electric field permits explaining the experimentally observed variations in the thermoelectromechanical properties of the material and using the simulation results to develop technological methods of metal treatment. |
| Keywords |
thermoelectroplasticity, direct numerical simulation, material structure with defects, electric field temperature localization |
| References |
| 1. | V. I. Spitsyn and O. A. Troitskii,
The Electroplastic Deformation of Metals
(Nauka, Moscow, 1985)
[in Russian]. |
| 2. | N. N. Beklemishev, V. N. Kukudzhanov, V. A. Porokhov, et al.
Plasticity and Strength of Metallic Materials with the Pulse Action of a High-Energy Electromagnetic Field Taken into Account,
Preprint No. 372
(IPM AN SSSR, Moscow, 1989)
[in Russian]. |
| 3. | N. N. Beklemishev, N. I. Koryagin, and G. S. Shapiro,
"Influence of Locally Inhomogeneous Pulse Electric Field on Plasticity and
Strength of Conducting Materials,"
Izv. Akad. Nauk SSSR. Met.,
No. 4, 184-187 (1984)
[Russ. Metallurgy (Metally) (Engl. Transl.)]. |
| 4. | V. Ya. Kravchenko,
"Effect of a Directed Electron Beam on Moving Dislocations,"
Zh. Eksp. Teor. Fiz.
51 (6), 1676-1681 (1966).
[Sov. Phys. JETP (Engl. Transl.)
24 (6), 1135-1142 (1967)]. |
| 5. | K. M. Klimov and I. I. Novikov,
"Influence of Temperature Gradient and Electric Current of High Density on
Plastic Strain under Tension of Metallic Wires,"
Izv. Akad. Nauk SSSR. Met.,
No. 6, 175-179 (1978)
[Russ. Metallurgy (Metally) (Engl. Transl.)]. |
| 6. | R. L. Salganik,
"Thermoelastic Equilibrium of a Solid with Cracks under
Heating Caused by Passage of a Current Perpendicular to the Cracks,"
Izv. Akad. Nauk SSSR. Mekh. Tverd. Tela,
No. 5, 141-152 (1978)
[Mech. Solids (Engl. Transl.)
13 (5), 129-138 (1978)]. |
| 7. | R. L. Salganik,
"Heating of a Material with an Ellipsoidal Nonuniformity as a Result of Electrical Losses,"
Izv. Akad. Nauk SSSR. Mekh. Tverd. Tela,
No. 6, 98-109 (1980)
[Mech. Solids (Engl. Transl.)
15 (6), 87-98 (1980)]. |
| 8. | V. D. Klyushnikov and I. V. Ovchinnikov,
"Plane Problem of Effect of an Instantaneous Point Heat Source,"
Izv. Akad. Nauk SSSR. Mekh. Tverd. Tela,
No. 4, 118-122 (1988)
[Mech. Solids (Engl. Transl.)
23 (4), 113-117 (1988)]. |
| 9. | I. V. Ovchinnikov,
Influence of Electric Current Action on Plasticity of Metals,
Candidate's Dissertation in Mathematics and Physics
(Moscow, 1969)
[in Russian]. |
| 10. | V. N. Kukudzhanov, N. N. Beklemishev, and V. A. Porokhov,
"Quasistatic Uniaxial Softening of Some Metallic Materials
under Conditions of Rigid Fixation and under Action of Electromagnetic Field,"
Vestnik Nizhegorod. Univ. Ser. Mekh.,
No. 1 (5), 129-141 (2003). |
| 11. | V. A. Porokhov and V. N. Kukudzhanov,
"Some Characteristic Features of the Influence of Current Pulses
on the Metal Plasticity at High Strain Rates,"
Probl. Prochn. Plastichn.,
No. 67, 132-142 (2005). |
| 12. | V. N. Kukudzhanov,
"Coupled Models of Elastoplasticity and Damage and Their Integration,"
Izv. Akad. Nauk. Mekh. Tverd. Tela,
No. 6, 103-135 (2006)
[Mech. Solids (Engl. Transl.)
41 (6), 83-109 (2006)]. |
| 13. | V. N. Kukudzhanov and A. V. Kolomiets,
"The Effect of Strain-Stress State Inhomogeneity on Plastic Strain Localization in Bending a Two Layered Plate,"
Vestnik Samar. Gos. Univ. Estestvennonauchn. Ser.,
No. 3 (62), 235-245 (2008). |
| 14. | A. L. Gurson,
"Continuum Theory of Ductile Rupture by Void Nucleation and Growth:
Part I. Yield Criteria and Flow Rules for Porous Ductile Materials,"
J. Engng Mater. Technol.
99, 2-15 (1977). |
| 15. | V. Tvergaard,
"Influence of Voids on Shear Band Instabilities under Plane Strain Conditions,"
Int. J. Fract. Mech.
17 (4), 389-407 (1981). |
| 16. | V. M. Finkel', Yu. I. Golovin, and A. A. Sletkov,
"Possibility of Braking Rapid Cracks by Pulses of Current,"
Dokl. Akad. Nauk SSSR
227 (4), 848-851 (1976).
[Sov. Phys. Dokl. (Engl. Transl.)
21 (4), 216 (1976)]. |
| 17. | V. M. Finkel', Yu. I. Golovin, and A. A. Sletkov,
"Disintegration of a Crack Tip with a Strong Electromagnetic Field,"
Dokl. Akad. Nauk SSSR
237 (2), 325-327 (1977).
[Sov. Phys. Dokl. (Engl. Transl.)
22, 683-685 (1977)]. |
| 18. | G. V. Stepanov, A. I. Babutskii, and I. A. Mameev,
"High-Density Pulse Current-Induced Unsteady Stress-Strain State in a Long Rod,"
Probl. Prochn.,
No. 4, 60-67 (2004)
[Strength of Materials (Engl. Transl.)
36 (4), 377-381 (2004)]. |
| 19. | V. I. Dubinko and V. F. Klepikov,
"Kinetic Mechanism of the Electroplastic Effect in Metals,"
Izv. Ross. Akad. Nauk. Ser. Fiz.
72 (9), 1257-1258 (2008)
[Bull. Russ. Acad. Sci. Phys. (Engl. Transl.)
72 (9), 1188-1189 (2008)]. |
| 20. | V. I. Stashenko, O. A. Troitskii, and N. N. Novikova,
"Electroplastic Drawing of a Cast-Iron Wire,"
Probl. Mashinostr. Nadezhn. Mashin
No. 2, 85-88 (2009)
[J. Machinery Manufact. Reliabil. (Engl. Transl.)
38 (2), 182-184 (2009)]. |
| 21. | O. A. Troitsky,
"Use of Electroplastic Effect in Metal Forming,"
Metallurg. Mashinostr.,
No. 4, 45-48 (2010). |
|
| Received |
20 July 2011 |
| Link to Fulltext |
|
| << Previous article | Volume 46, Issue 6 / 2011 | Next article >> |
|
 If you find a misprint on a webpage, please help us correct it promptly - just highlight and press Ctrl+Enter
|
|
Russian 
English