Abstract
Failure analysis, carried out in order to explore the causes of the failure of equipment, is one of the most complex types of material testing work. It is not only necessary to know a wide range of material testing procedures, but also to have sufficient experience in performing a significant part of them and evaluating the test results. As an example of this, the article describes the investigation of the cause of failure of a car engine component that became damaged during normal service. The examinations include various methods of optical microscopy, scanning electron microscopy, EDS analysis and fractography. From the results of the failure analysis, it can be concluded that the root cause of the failure was, most probably, abnormal wear of some components, wear that can be traced back to small manufacturing inaccuracies.
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