Analysis of combined static load and low temperature hot corrosion induced cracking in CMSX-4 at 550°C

Date published

2019-10-18

Free to read from

Supervisor/s

Journal Title

Journal ISSN

Volume Title

Publisher

Elsevier

Department

Type

Article

ISSN

0010-938X

Format

Citation

Brooking L, Gray S, Dawson K, et al., (2020) Analysis of combined static load and low temperature hot corrosion induced cracking in CMSX-4 at 550°C. Corrosion Science, Volume 163, February 2020, Article number 108293

Abstract

A CMSX-4 3-point bend specimen was statically loaded under hot corrosion conditions and SEM, (S)TEM and EDX techniques were used to analyse the cracking generated. Sulphur, chlorine, sodium and oxygen were found at the crack tip, and an influence of loading on the corrosion mechanism’s preference to interact with either the γ or γʹ was observed. The microscopy analysis is in support of the corrosive mechanism being a combined stress and electrochemical corrosion linked with low temperature hot corrosion, where crack propagation occurs as a result of localised corrosion enhanced material degradation. High magnification EDX mapping identified W as segregating to the γʹ at room temperature.

Description

Software Description

Software Language

Github

Keywords

superalloy, partitioning, Stress corrosion cracking, Hot corrosion, TEM

DOI

Rights

Attribution 4.0 International

Relationships

Relationships

Supplements

Funder/s