Work

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

Year: 2025

Type: article

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.

Source: Materials

DOI: 10.3390/ma18163819

Authors: Yong Li, Helen Davies, Mark Hardy, Catherine Jackson, Mark Whittaker

Institutions: Swansea University, Rolls-Royce (United Kingdom)

Language: English

Topic: High-Temperature Coating Behaviors

Subfield: Aerospace Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $3,137

Funder: Division of Materials Research