Assessment of corrosion fatigue damage by acoustic emission and periodic proof tests
Abstract
The development of a better nondestructive inspection method for detecting corrosion fatigue damage based on acoustic emission (AE) and periodic proof testing (PPT) is studied for corrosion fatigue tests in salt water solution under tension-tension loading. It is shown that PPT combined with AE monitoring can be a sensitive method for assessing the progress of corrosion fatigue damage as the continuous AE monitoring method. The AE-PPT technique is shown to be dependent on the geometry and size of the crack relative to the test specimen. A qualitative method based on plateauing of acoustic emission counts during proof tests due to changes in the fracture mode is used to predict the remaining fatigue life up to 70% of the actual values. PPT is shown to have no adverse effect on fatigue performance in salt water.
- Publication:
-
Materials Evaluation
- Pub Date:
- March 1976
- Bibcode:
- 1976MatEv..34...55M
- Keywords:
-
- Corrosion Tests;
- Fatigue Life;
- Fatigue Tests;
- Stress Cycles;
- Stress Waves;
- Tensile Stress;
- Axial Loads;
- Crack Initiation;
- Crack Propagation;
- Failure Analysis;
- Piezoelectric Transducers;
- Plastic Deformation;
- Salt Baths;
- Instrumentation and Photography