Pair interaction of dislocations and twin boundary motion in bismuth single crystals under alternating cyclic loading

M.E.Bosin, F.F.Lavrent'ev*, V.N.Nikiforenko*


Kharkiv Polytechnical University, 21 Frunze St., 310002 Kharkiv, Ukraine
*B.I.Verkin Institute for Low Temperature Physics and Engineering, 47 Lenin Ave., 310164 Kharkiv, Ukraine

Received February 5, 1998; in final form October 10, 1998

Dislocation reactions in bismuth single crystals were considered using the crystal geometry method in an effort to reveal the causes of the twin width stabilization in the course of twinning and untwinning as well as of the increase in the twin boundary motion rate at the untwinning under the alternating cyclic loading. The consideration has shown that there are four physically inequivalent reactions that are of a particular interest. The increase of the twin boundary motion rate is associated with the pair dislocation interaction where the resulting dislocation is a source of the twinning ones.

Previous | Contents | Next