On the effect of Ti on Oxidation Behaviour of a Polycrystalline Nickel-based Superalloy

On the effect of Ti on Oxidation Behaviour of a Polycrystalline Nickel-based Superalloy

Titanium is commonly added to nickel superalloys but has a well-documented detrimental effect on oxidation resistance. The present work constitutes the first atomistic-scale quantitative measurements of grain boundary and bulk compositions in the oxide scale of a current generation polycrystalline n...

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Veröffentlicht in:arXiv.org 2018-10
Hauptverfasser: Pedrazzini, S, Rowlands, B S, Turk, A, Parr, I M D, Hardy, M C, Bagot, P A J, Moody, M P, Galindo-Nava, E, Stone, H J
Format: Artikel
Sprache:eng
Schlagworte:
Grain boundaries
Grain boundary diffusion
Nickel
Nickel base alloys
Oxidation
Oxidation resistance
Polycrystals
Scale (corrosion)
Superalloys
Titanium
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Zusammenfassung:Titanium is commonly added to nickel superalloys but has a well-documented detrimental effect on oxidation resistance. The present work constitutes the first atomistic-scale quantitative measurements of grain boundary and bulk compositions in the oxide scale of a current generation polycrystalline nickel superalloy performed through atom probe tomography. Titanium was found to be particularly detrimental to oxide scale growth through grain boundary diffusion.
ISSN:2331-8422