Mean-Square Amplitudes of Atomic Vibrations in y -based Phases

Mean-Square Amplitudes of Atomic Vibrations in y -based Phases 

In alloy production, the y -phase is a phase of a variable composition. The industrial alloys never contain the phase of B3A-type in the stoichiometric relation of two chemical elements. It solutes other elements, which one adds to the superaUoy composition in order to ensure desired properties. 

Sublattices B and A of the y -phase can dissolve a considerable amount of other elements. Many of the industrial nickel-based superalloys also contain, in addition to chromium, aluminum, and titanium, molybdenum, tungsten, niobium, tantalum, and cobalt. The addition of rhenium and ruthenium are under investigation for superaUoys, which must withstand high stresses at temperatures from 1273 to 1373 K. 

The strength of interatomic bonding in Ni3Al-based phases depends appreciably upon their composition. 

The obtained data are presented in Table 10.1. The first column of the Table is the composition of aUoys, the second column is the composition of strengthening phases. Nickel is the rest in composition of superalloys, lines from 2 to 4. 

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