The results from the 3D surface analyser further demonstrates the occurrence of variation in wear distribution with some zones under higher intensity of material erosion.
The result of visual observations revealed the presence of wear debris around the failed teeth, while the optical micrographs depicted the occurrence of pitting corrosion, Also, observed were regions that show zones of high stress raisers. The result obtained from the microstructures were further analysed using 3D surface analyser. Further to this, the samples were subjected to visual observation. Each of the samples were observed under the optical microscope at different magnifications, ranging from 10, 40 and 100 µm. Three (3) different failed gear teeth were selected and prepared as metallographic samples. Thus, the study focused on the analysis of a failed intermediate star wheel spur gear tooth using metallographic observations.
Forensic investigation of failed engineering component involved the applications of engineering methods and techniques to determine the root cause of failure and how to prevent subsequent failures.
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