Analysis of combined static load and low temperature hot corrosion induced cracking in CMSX-4 at 550 degrees C
| Autor: | Joy Sumner, Gordon J. Tatlock, John Nicholls, Nigel J. Simms, Karl Dawson, Laurie Brooking, Stephen K. Gray |
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| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Materials science
020209 energy General Chemical Engineering chemistry.chemical_element Fracture mechanics Stress corrosion cracking 02 engineering and technology General Chemistry 021001 nanoscience & nanotechnology Oxygen Corrosion Superalloy Stress (mechanics) Cracking superalloy chemistry Hot corrosion partitioning TEM 0202 electrical engineering electronic engineering information engineering Chlorine General Materials Science Composite material 0210 nano-technology |
| Zdroj: | CORROSION SCIENCE |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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