Laves phases dislocations

Crystal stracture, twinning, dislocation stmetures and orientation relationships of MgCu2 type precipitates in Zr rich alloys have been studied by [1986Menl]. Polytypic structures assumed by Zr(Fe,Cr)2 Laves phases have been studied by [1986Men2, 1991Bur] both in bulk materials and in precipitates included in Zn rich alloys. Samples were analyzed by [1991 Bur] in as cast conditions as well as after heat treatment at 850 or 900°C. The variety of polytypic structures observed in precipitates was attributed to the lattice misfit and associated stresses between precipitates and the aZr matrix. 

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