Abstract
The effect of aluminum additions on the microstructure and the phase composition of an Ni-25 at % V alloy is studied. It is shown that the introduction of aluminum into Ni-V alloys decreases their maximum possible high-temperature strength, since an ordering-separation phase transition occurs in the Ni-Al diffusion couple at temperatures slightly higher than 1200°C with the formation of quasi-liquid aluminum atom clusters in the solid solution lattice.
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