Abstract
The deformation of bismuth crystals under mechanical stress and simultaneous superposition of a constant magnetic field and an impulse electric current has been investigated experimentally.
Two plastifying factors have been identified. The first is a damping elastic ultrasonic vibration caused by the Ampere force. In case of the deformation by twinning, these vibrations result in an increase of the density of twinning wedges around the indentation of a diamond indentor. The second factor is an electric charge on the free surface. The electric charge on the (111) cleavage face increases the mobility of twinning dislocations.
Literature
1. Bataronov, I.; Rostchupkin, A.: Fiz. tverd. Tela. 30 (1988) 3311 – 3314.Search in Google Scholar
2. Savenko, V; Pinchuk, A.: Izv. of VUZ, ser. Chernaya Metalurgia. N1 (1992) 93 – 95.Search in Google Scholar
3. Upit, G.; Varchenya, S.; Spalvin, I.: phys. stat. sol. 15 (1966) 617 – 621.Search in Google Scholar
4. Savenko, V.: Proceedings of the Acad. Sci. of Belarus, Ser. Phys.- mat. N2 (1985) 106–108.Search in Google Scholar
5. Kosevich, A.; Boyko, V.: Uspehi Fiz. Nauk. 104 (1971) 201–254.Search in Google Scholar
6. Savenko, V.; Spitsyn, V; Troitsky, O.: Dokl. Akad. Nauk USSR. 283 (1985) 1181 – 1183.Search in Google Scholar
7. Lihtman, V.; Shtsukin, E.; Rebinder, P.: Physico-Chemistry Mechanics of Metals, Moscow (1962).Search in Google Scholar
8. Hirth, J.; Lothe, J.: The Theory of Dislocation. Moscow (1971).Search in Google Scholar
9. Kozlov, A.; Mordyuk, B.; Chernyashevski, A.: Metallophis. i nov. tehnol. 16 (1994) 78 – 80.Search in Google Scholar
© 1998 Carl Hanser Verlag, Munchen