Metallurgical Failure Analysis
3568 Caminito El Rincon, #93
San Diego, California, 92130
209 367-1398 - Email: email@example.com
Mark Douglas Bell, PE
Consulting Metallurgical Engineer
|When a component is in a corrosive environment and also subject to fatigue loading the combination of both corrosion and fatigue will accelerate the failure. One characteristic of corrosion-fatigue is multiple initiation cracks. These grow by the crack propagating by fatigue and also from corrosion. Eventually one crack will predominate and it will grow to a greater extent that the remaining cracks. This predominate crack will lead to the failure. Springs, shafts and fasteners are subject to corrosion-fatigue.
Material selection, control of service environment, design and inspection are methods to control corrosion-fatigue.