What Is Corrosion Fatigue?
Corrosion fatigue is the phenomenon of crack formation and propagation under the interaction of alternating loads and corrosive media. Reduced fatigue resistance due to the effect of corrosive media. Under alternating loads, fatigue damage first occurs on the surface, and eventually fracture or leakage occurs under the action of continuous corrosion rings. Corrosion fatigue can occur in materials that are sensitive or insensitive to stress corrosion, so no metal or alloy can resist corrosion fatigue. Corrosion fatigue cracks are usually transcrystalline. One difference from stress corrosion is the stress intensity factor of cracks. Even if the critical stress intensity factor (KISCC) value of pure stress corrosion is smaller, cracks will grow with time. The final fracture stage of corrosion fatigue is purely mechanical and independent of the medium. [1]
Corrosion fatigue
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- Chinese name
- Corrosion fatigue
- Foreign name
- corrosion fatigue
- Meaning
- Reduce component fatigue performance
- the reason
- Metals are corroded by acids and bases
- Corrosion fatigue is the phenomenon of crack formation and propagation under the interaction of alternating loads and corrosive media. Reduced fatigue resistance due to the effect of corrosive media. Under alternating loads, fatigue damage first occurs on the surface, and eventually fracture or leakage occurs under the action of continuous corrosion rings. Corrosion fatigue can occur in materials that are sensitive or insensitive to stress corrosion, so no metal or alloy can resist corrosion fatigue. Corrosion fatigue cracks are usually transcrystalline. One difference from stress corrosion is the stress intensity factor of cracks. Even if the critical stress intensity factor (KISCC) value of pure stress corrosion is smaller, cracks will grow with time. The final fracture stage of corrosion fatigue is purely mechanical and independent of the medium. [1]
- Corrosion fatigue
- Corrosion fatigue: Many metal material components in chemical equipment work in a corrosive environment, and also bear the role of alternating loads. Compared with the case of alternating load in an inert environment, the combined effect of alternating load and corrosive environment will often significantly reduce the fatigue performance of components. This fatigue damage phenomenon is called corrosion fatigue.