Abstract
A large increase in dislocation mobility in Al single crystals in a static magnetic field in the absence of mechanical loading of the samples is observed when a dc electric current of low density (105–106 A/m2)is additionally passed through the samples. Apparently, the role of the current reduces to depinning of dislocations from strong pinning centers on the surface of the crystal as a result of surface electromigration of defects. This interpretation is supported by the fact that in samples whose surface is insulated by a layer of lacquer the passage of a current through the volume of the crystal does not change the ordinary dislocation mobility level in a magnetic field. It is hypothesized that surface electromigration of defects, which frees dislocations and unblocks dislocation sources, also plays a key role in the physical mechanism of the long-ago discovered macroplastification of metals upon the passage of an electric current through them.
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References
V. I. Al’shits, E. V. Darinskaya, T. M. Perekalina, and A. A. Urusovskaya, Fiz. Tverd. Tela (Leningrad) 29, 467 (1987) [Sov. Phys. Solid State 29, 265 (1987)].
V. I. Al’shits, E. V. Darinskaya, and E. A. Petrzhik, Fiz. Tverd. Tela (Leningrad) 33, 3001 (1991) [Sov. Phys. Solid State 33, 1694 (1991)].
M. Molotskii and V. Fleurov, Phys. Rev. Lett. 78, 2779 (1997).
V. I. Al’shits, E. V. Darinskaya, and O. L. Kazakova, Zh. Éksp. Teor. Fiz. 111, 615 (1997) [JETP 84, 338 (1997)].
Ya. B. Zel’dovich, A. L. Buchachenko, and E. L. Frankevich, Usp. Fiz. Nauk 155, 3 (1988) [Sov. Phys. Usp. 31, 385 (1988)].
Yu. I. Golovin and R. B. Morgunov, JETP Lett. 61, 596 (1995).
A. A. Urusovskaya, V. I. Al’shits, A. E. Smirnov, and N. N. Bekkauer, JETP Lett. 65, 497 (1997).
Yu. I. Golovin, R. B. Morgunov, D. V. Lopatin, and A. A. Baskakov, Phys. Status Solidi A 160, R3 (1997).
V. I. Al’shits, E. V. Darinskaya, I. V. Gektina, and F. F. Lavrent’ev, Kristallografiya 35, 1014 (1990) [Sov. Phys. Crystallogr. 35, 597 (1990)].
V. I. Al’shits, E. V. Darinskaya, and E. A. Petrzhik, Fiz. Tverd. Tela (Leningrad) 34, 155 (1992) [Sov. Phys. Solid State 34, 81 (1992)].
V. I. Al’shits, R. Voska, E. V. Darinskaya, and E. A. Petrzhik, Fiz. Tverd. Tela (St. Petersburg) 35, 70 (1993) [Phys. Solid State 35, 37 (1993)].
O. A. Troitskii, JETP Lett. 10, 11 (1969).
O. A. Troitskii and P. U. Kalymbetov, Fiz. Met. Metalloved. 51, 1056 (1981).
V. I. Stachenko, O. A. Troitskii, and V. I. Spitsyn, Phys. Status Solidi A 79, 549 (1983).
O. A. Troitskii, M. M. Moiseenko, and V. I. Spitsin, Dokl. Akad. Nauk SSSR 274, 587 (1984) [Sov. Phys. Dokl. 29, 71 (1984)].
O. A. Troitskii, A. M. Roshchupkin, V. I. Stashenko et al., Fiz. Met. Metalloved. 61, 990 (1986).
V. B. Pariiskii, A. I. Landau, and V. I. Startsev, Fiz. Tverd. Tela (Leningrad) 5, 1377 (1963) [Sov. Phys. Solid State 5, 1002 (1963)].
V. I. Al’shits, E. V. Darinskaya, O. L. Kazakova et al., JETP Lett. 63, 668 (1996).
V. Ya. Kravchenko, Zh. Éksp. Teor. Fiz. 51, 1676 (1966) [Sov. Phys. JETP 24, 1135 (1967)].
V. B. Fiks, Zh. Éksp. Teor. Fiz. 80, 2313 (1981) [Sov. Phys. JETP 53,1209 (1981)].
E. E. Vdovin and A. Yu. Kasumov, Fiz. Tverd. Tela (Leningrad) 30, 311 (1988) [Sov. Phys. Solid State 30, 180 (1988)].
V. P. Alekhin, Physics of Strength and Plasticity of the Surface Layers of Materials [in Russian], Nauka, Moscow, 1983.
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Pis’ma Zh. Éksp. Teor. Fiz. 67, No. 10, 788–793 (25 May 1998)
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Al’shits, V.I., Darinskaya, E.V., Mikhina, E.Y. et al. On the nature of the influence of an electric current on the magnetically stimulated microplasticity of Al single crystals. Jetp Lett. 67, 832–838 (1998). https://doi.org/10.1134/1.567757
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DOI: https://doi.org/10.1134/1.567757