Abstract
Phase transformation during the process of directional crystallization and following cooling in Ni- based alloys was studied by means of new X-ray method of analysis. It is based on experimental analysis and computer modelling of X- ray diffuse scattering by such alloys. During the production of such single crystals after their cooling the part decompozition of the supersaturated solid solution takes place with the alloyed γ'-phase on the basis of Ni3Al particles formation, which form Guinie-Preston zones of different size. During the following aging the further excretion of such particles takes place with the changing of their size and quantity. This influences the strength properties of such materials.
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