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Corrosion Fatigue of a Nickel-Based Superalloy Disc Rotor with Salt in Air and Sulphur Dioxide Environments

Yong Li, Helen Davies Orcid Logo, Mark Hardy, Catherine Jackson, Mark Whittaker Orcid Logo

Materials, Volume: 18, Issue: 16, Start page: 3819

Swansea University Authors: Yong Li, Helen Davies Orcid Logo, Mark Whittaker Orcid Logo

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DOI (Published version): 10.3390/ma18163819

Abstract

The fatigue performance of a recently developed nickel superalloy disc was investigated at 700 °C in two environments: air and sulphur dioxide (SO2). Prior to testing, specimens were coated with various amounts of sodium sulphate (Na2SO4) and sodium chloride (NaCl) mixed salt (98% Na2SO4 + 2% NaCl),...

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Published in: Materials
ISSN: 1996-1944
Published: MDPI AG 2025
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URI: https://cronfa.swan.ac.uk/Record/cronfa70405
Abstract: The fatigue performance of a recently developed nickel superalloy disc was investigated at 700 °C in two environments: air and sulphur dioxide (SO2). Prior to testing, specimens were coated with various amounts of sodium sulphate (Na2SO4) and sodium chloride (NaCl) mixed salt (98% Na2SO4 + 2% NaCl), and the influence of both environment and salt loading on corrosion fatigue were assessed. Preliminary results showed that salt exposure in air reduced fatigue strength, with greater damage at higher salt levels. In the SO2 environment, fatigue strength dropped even more due to low-temperature hot corrosion (LTHC). The details of the corrosion morphology formed in both air and SO2 environments are discussed.
Keywords: corrosion fatigue; nickel superalloy; fatigue strength; low-temperature hot corrosion
College: Faculty of Science and Engineering
Funders: The current research was funded under the UK innovation CRUISE project.
Issue: 16
Start Page: 3819

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