... thermal stress cracking creep-fatigue thermal fatigue electropolishing technique hot corrosion nozzle segment microstructure oxidation and repairs The first stage nozzle segments perform the function of turning and directing the flow of hot gas into the rotating stage of the turbine...

... the X-40 substrate in both narrow and wide gap configurations. Metallographic examination, X-ray mapping, and energy dispersive spectroscopy semiquantitative compositional analyses were carried out to study the microstructures in the braze joint in the as-brazed condition and after thermal exposure...