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National Repository of Grey Literature 2 records found  Search took 0.01 seconds. 
Investigation of dislocation structure evolution in advanced magnesium alloys
 Šimko, Pavol ; Mathis, Kristián (advisor) ; Drozd, Zdeněk (referee)
: This thesis deals with evolution of dislocation structures in mag- nesium alloys containing long-period stacking ordered phase (LPSO). Before de- formation the samples were studied by optical light microscopy, in the process of deformation by neutron diffraction. Obtained diffraction profiles were of two types, axial and radial diffraction profiles (created by planes oriented in the di- rection of deformation and orthogonally to the direction of deformation). Profiles were evaluated by Convolutional Multiple Whole Profile method and by Hexbur- ger program. This work is focused on the role of LPSO phase in the evolution of dislocation density and population of dislocations in slip systems depending on the composition of alloys and on the volume fraction of LPSO phase. 1
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Approximations of Fourier coefficients of diffractions profiles
 Čerňanský, Marian
Approximations in the Warren-Averbach interpretation of Fourier coeeficients of diffraction profiles are briefly summarized. It is shown, that certain approximations of a course of Fourier coefficients enable estimate of crystallite size and microstrain only from a single diffraction line.
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