Figure 3. Thermo-Calc for (a) the nominal composition of the parent alloy, showing phase fraction vs temperature (Note that the predicted phases labelled 3, 6, 7, 8 and 9 were not observed in this work) (b) the composition of M₃B₂ boride. It predicts the onset of melting of the boride to be about 1200°C (insert black arrow)

From

On the Role of Boride in the Structural Integrity of a Turbine Disc Superalloy’s Solid State Weld

K.M. Oluwasegun, J.O Olawale, M.D. Shittu, O.O. Ige, P.O. Atanda, O.O. Ajide, L.O. Osoba

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