J. Phys. IV France
Volume 112, October 2003
Page(s) 147 - 150

J. Phys. IV France
112 (2003) 147
DOI: 10.1051/jp4:2003853

Cryston model of formation of $\alpha$ strain induced martensite

M.P. Kashchenko, A.G. Semenovih and V.G. Chashchina

Ural State Forest Engineering University, Physics Chair, Sybirskiy Trakt 37, 620100 Ekaterinburg, Russia

The strain-induced martensite formation is considered as a consequence of carry of a threshold plastic deformation by crystons. The sources of crystons (carriers of shear of a superdislocation type) are caused by interaction of dislocations belonging to systems with intersected slip planes. For crystons (carriers of simple shear) the physical nature of morphological features of a strain-induced martensite crystals and their difference from a case of stressinduced and cooling-induced martensites is discussed. A case of crystal with habits of {hhl} - type is analyzed most explicitly The deloniialions of compression $\epsilon_2$ and tension $\epsilon_1$ along orthogonal axes <001 > initiating the Bein strain process are considered as order parameters controlling the austenite stability. The connection between the abnormal orientation relationship for $\alpha'$ martensite crystals formed under tensite loading and the threshold deformation is obtained.

© EDP Sciences 2003