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Data supporting: Oxidation behaviour of single crystal nickel based superalloys: Intermediate temperature effects at 450-550oC

Data supporting: Oxidation behaviour of single crystal nickel based superalloys: Intermediate temperature effects at 450-550oC
Data supporting: Oxidation behaviour of single crystal nickel based superalloys: Intermediate temperature effects at 450-550oC
This data supports the following publication: Evangelou A., Soady K.A., Lockyer S., Gao N., Reed P.A.S.(2017), Oxidation behaviour of single crystal nickel based superalloys: Intermediate temperature effects at 450-550oC. Abstract: The oxidation behaviour of two commercially available single crystal nickel based superalloys has been investigated at the lower operating temperature range (450-550ºC) of an industrial gas turbine blade. Isothermal oxidation was carried out for varying times up to 640h and the low temperature exposure resulted in a sub-micron thick oxide. The external and internal oxide kinetics were studied via high resolution image analysis and both showed sub-parabolic growth rates. Thermogravimetric tests indicated that the overall oxidation growth obeys a near quartic power law while parabolic kinetics can describe the transient oxidation period. Characterisation of the resulting oxides was carried out using field emission gun scanning electron microscopy, energy dispersive spectroscopy and X-ray diffraction. Results from thermodynamic modelling (Thermo-Calc) of the oxide formation are also presented to further assess the postulated mechanism of low temperature oxidation in these nickel based superalloys.
low temperature, Ni superalloy, oxidation, single crystal, sub-parabolic kinetics
University of Southampton
Evangelou, Angelos
840a9ab3-d2f9-4dee-9d5a-9f9c18c43be8
Soady, Katherine
be674732-80c9-4a19-b1af-8924a1695dc3
Lockyer, Scott
ad19e5ed-2384-4ce3-a247-7bc98e1b60b2
Gao, Nong
9c1370f7-f4a9-4109-8a3a-4089b3baec21
Reed, Philippa
8b79d87f-3288-4167-bcfc-c1de4b93ce17
Evangelou, Angelos
840a9ab3-d2f9-4dee-9d5a-9f9c18c43be8
Soady, Katherine
be674732-80c9-4a19-b1af-8924a1695dc3
Lockyer, Scott
ad19e5ed-2384-4ce3-a247-7bc98e1b60b2
Gao, Nong
9c1370f7-f4a9-4109-8a3a-4089b3baec21
Reed, Philippa
8b79d87f-3288-4167-bcfc-c1de4b93ce17

Evangelou, Angelos, Soady, Katherine, Lockyer, Scott, Gao, Nong and Reed, Philippa (2017) Data supporting: Oxidation behaviour of single crystal nickel based superalloys: Intermediate temperature effects at 450-550oC. University of Southampton doi:10.5258/SOTON/D0154 [Dataset]

Record type: Dataset

Abstract

This data supports the following publication: Evangelou A., Soady K.A., Lockyer S., Gao N., Reed P.A.S.(2017), Oxidation behaviour of single crystal nickel based superalloys: Intermediate temperature effects at 450-550oC. Abstract: The oxidation behaviour of two commercially available single crystal nickel based superalloys has been investigated at the lower operating temperature range (450-550ºC) of an industrial gas turbine blade. Isothermal oxidation was carried out for varying times up to 640h and the low temperature exposure resulted in a sub-micron thick oxide. The external and internal oxide kinetics were studied via high resolution image analysis and both showed sub-parabolic growth rates. Thermogravimetric tests indicated that the overall oxidation growth obeys a near quartic power law while parabolic kinetics can describe the transient oxidation period. Characterisation of the resulting oxides was carried out using field emission gun scanning electron microscopy, energy dispersive spectroscopy and X-ray diffraction. Results from thermodynamic modelling (Thermo-Calc) of the oxide formation are also presented to further assess the postulated mechanism of low temperature oxidation in these nickel based superalloys.

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Published date: 2017
Keywords: low temperature, Ni superalloy, oxidation, single crystal, sub-parabolic kinetics
Organisations: Education Hub, Mechanical Engineering, Engineering Mats & Surface Engineerg Gp

Identifiers

Local EPrints ID: 426057
URI: http://eprints.soton.ac.uk/id/eprint/426057
DOI: doi:10.5258/SOTON/D0154
PURE UUID: 2d9ec6f2-e980-45cb-838a-8ac3c45fcabe
ORCID for Nong Gao: ORCID iD orcid.org/0000-0002-7430-0319
ORCID for Philippa Reed: ORCID iD orcid.org/0000-0002-2258-0347

Catalogue record

Date deposited: 09 Nov 2018 17:31
Last modified: 05 Nov 2023 02:38

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Contributors

Creator: Angelos Evangelou
Creator: Katherine Soady
Creator: Scott Lockyer
Creator: Nong Gao ORCID iD
Creator: Philippa Reed ORCID iD

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