Low Temperature Physics: 44, 973 (2018); https://doi.org/10.1063/1.5052687
Fizika Nizkikh Temperatur: Volume 44, Number 9 (September 2018), p. 1241-1244    ( to contents , go back )

Some aspects of double twinning in hexagonal metals

A. Ostapovets

Central European Institute of Technology-Institute of Physics of Materials (CEITEC IPM), Academy of Sciences of the Czech Republic, Žižkova 22, CZ-616 62 Brno, Czech Republic
E-mail: ostapov@ipm.cz

V. Paidar

Institute of Physics, Academy of Sciences of the Czech Republic, Na Slovance 2, CZ-182 21 Prague 8, Czech Republic
E-mail: paidar@fzu.cz

Received April 18, 2018, published online July 26, 2018

Abstract

When plastic deformation cannot be carried by dislocations, mechanical twinning is often activated. This situation often takes place in hexagonal materials. In addition to general grain boundaries, twin boundaries as special interfaces play an important role not only for mechanical properties but for other properties of materials as well. This short paper is focused only on some processes related to double twinning and the conditions of its occurrence are considered. Geometrical aspects are analyzed for development mechanisms of different twin interfaces in connection to double twinning.

Key words: hexagonal metals, mechanical properties, twinning.

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