General procedure of failure analysis: Background information collection — Lesson 4

This lesson covers the comprehensive process of failure analysis and prevention. It delves into the procedural steps involved in failure analysis, aiming to identify the primary causes of failure to prevent similar occurrences in the future. The lesson discusses the importance of collecting background information about the product, understanding its design, manufacturing processes, and service conditions. It also emphasizes the significance of photographic records, sample selection, and wreckage analysis. For instance, if a gear in an engine fails due to lack of lubrication, collecting the black oxide debris present on the surface can help identify the absence of lubricant as a possible cause of failure.

Video Highlights

00:18 - Introduction to the subject of failure analysis and prevention.
03:40 - Discussion on the importance of understanding the manufacturing process and procedural steps.
13:59 - Explanation of the importance of understanding service conditions and maintaining a service record of critical components.
25:35 - Explanation of the importance of considering the possibility of abnormal load conditions in failure analysis .

Key Takeaways

- Failure analysis is crucial to identify the primary causes of failure and take corrective action to avoid similar failures.
- Collecting background information about the product, its design, manufacturing processes, and service conditions is a vital step in failure analysis.
- Photographic records of the failed component and the accident site can provide valuable evidence.
- Sample selection should be representative of the failure of the component and should also include samples from other locations for comparison.
- Wreckage analysis, including finding the position of different fractured components and maintaining an inventory of failed components, can provide insights into the cause of failure.