Oxidation behaviour of a developmental nickel-based alloy and the role of minor elements

Mary Taylor; Rengen Ding; Paul M. Mignanelli; Mark Hardy

doi:10.1016/j.corsci.2021.110002

Oxidation behaviour of a developmental nickel-based alloy and the role of minor elements

Mary Taylor, Rengen Ding, Paul M. Mignanelli, Mark Hardy

Metallurgy and Materials

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Abstract

The oxidation kinetics of a chromia forming development nickel-based superalloy over the temperature range of 700 to 850 °C under isothermal and 100 h thermal cycles are presented. The kinetics compare favourably with similar alloys and this is attributed to the formation of (Ti,Nb,Ta)(N,C,B) precipitates throughout the alloy. Between 840 and 850 °C a significant increase in the oxidation kinetics was observed; attributed to the dissolution of the precipitate phases, releasing titanium, tantalum and niobium into the alloy matrix. The results are discussed in terms of potential effect of the presence of (N,C,B) phases and stability on the oxidation kinetics.

Original language	English
Article number	110002
Number of pages	10
Journal	Corrosion Science
Volume	196
Early online date	5 Dec 2021
DOIs	https://doi.org/10.1016/j.corsci.2021.110002
Publication status	Published - Mar 2022

Keywords

Minor elements
Nickel-based alloy
Oxidation

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CORSCI-S-21-01394Submitted manuscript, 2.62 MB
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abstract = "The oxidation kinetics of a chromia forming development nickel-based superalloy over the temperature range of 700 to 850 °C under isothermal and 100 h thermal cycles are presented. The kinetics compare favourably with similar alloys and this is attributed to the formation of (Ti,Nb,Ta)(N,C,B) precipitates throughout the alloy. Between 840 and 850 °C a significant increase in the oxidation kinetics was observed; attributed to the dissolution of the precipitate phases, releasing titanium, tantalum and niobium into the alloy matrix. The results are discussed in terms of potential effect of the presence of (N,C,B) phases and stability on the oxidation kinetics.",

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AU - Taylor, Mary

AU - Ding, Rengen

AU - Mignanelli, Paul M.

AU - Hardy, Mark

PY - 2022/3

Y1 - 2022/3

N2 - The oxidation kinetics of a chromia forming development nickel-based superalloy over the temperature range of 700 to 850 °C under isothermal and 100 h thermal cycles are presented. The kinetics compare favourably with similar alloys and this is attributed to the formation of (Ti,Nb,Ta)(N,C,B) precipitates throughout the alloy. Between 840 and 850 °C a significant increase in the oxidation kinetics was observed; attributed to the dissolution of the precipitate phases, releasing titanium, tantalum and niobium into the alloy matrix. The results are discussed in terms of potential effect of the presence of (N,C,B) phases and stability on the oxidation kinetics.

AB - The oxidation kinetics of a chromia forming development nickel-based superalloy over the temperature range of 700 to 850 °C under isothermal and 100 h thermal cycles are presented. The kinetics compare favourably with similar alloys and this is attributed to the formation of (Ti,Nb,Ta)(N,C,B) precipitates throughout the alloy. Between 840 and 850 °C a significant increase in the oxidation kinetics was observed; attributed to the dissolution of the precipitate phases, releasing titanium, tantalum and niobium into the alloy matrix. The results are discussed in terms of potential effect of the presence of (N,C,B) phases and stability on the oxidation kinetics.

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KW - Oxidation

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VL - 196

JO - Corrosion Science

JF - Corrosion Science

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Oxidation behaviour of a developmental nickel-based alloy and the role of minor elements

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Keywords

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