The formation and evolution of NiAl phase in a fourth generation nickel-based single crystal superalloy

The formation mechanism of the Ru-rich β-NiAl phase in a nickel-based single crystal superalloy and its evolution course during the long-term aging were investigated. The β-NiAl phase confirmed via the XRD and TEM analysis was observed in the solidification process for casting alloy. The intensive study on the formation mechanism of the β-NiAl phase was conducted based on the analyses of the phase diagram, the incipient melting experiment, and...