Crystallographic slip

K.N. Melton, J.W. Edington, "Crystallographic slip during superplastic deformation of the Zn - A1 eutectoid alloy" Scipta Met. 6, 1141, 1974... 

The importance of the thermal conductivity of the crystal and the CRSS in determining the degree of difficulty of growing a specific material from the melt is understood in terms of the relationship between these parameters and the formation of dislocations in the crystal because of excess stress. Clearly, materials with lower values of the CRSS must be grown in systems with lower temperature gradients to prevent crystallographic slip. Low values of the conductivity make this difficult to achieve. 

Fig. 9.26 Kinematics of the various components of crystallographic slip and spin (a) the initial undeformed lattice, (b) the plastically sheared lattice in the initial framework, and (c) the plastically sheared and rotated lattice (from Lee et al. (1993b) courtesy of Elsevier).

The crystalline phase follows a few independent slip systems in which classical crystal plasticity theories cannot be utilized to model them [93-95]. Similar to the metallic crystalline phases, inelastic deformation in crystalline polymeric systems follows three different mechanisms (a) crystallographic slip, (b) twining, and (c) Martensite transformations [96]. All these mechanisms leave the crystallographic axis inextensible and provide less than five independent... 

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