Understanding Non-Destructive Testing Methods — Lesson 4

This lesson covers the second part of the series on Non-Destructive Testing, focusing on non-contact methods. It delves into radiographic, thermographic, visual, and X-ray computed tomographic tests. The lesson explains how these methods work, their applications, advantages, and disadvantages. For instance, radiographic testing involves sending radio signals to detect internal defects within a system, while thermographic testing measures temperature changes. Visual testing detects surface defects, and X-ray computed tomography uses computerized X-ray imaging. The lesson also discusses the costs, limitations, and potential improvements of these methods.

Video Highlights

00:25 - Explanation of non-contact methods such as radiographic, thermographic, visual and X-ray computed tomographic tests
05:04 - Explanation of digital radiography and film radiography
14:07 - Introduction to visual testing and its applications
21:45 - Discussion on the advantages and disadvantages of X-ray computed tomography

Key Takeaways

- Radiographic testing uses radio signals to detect internal defects within a system.
- Thermographic testing measures temperature changes to identify potential issues.
- Visual testing is a quick and inexpensive method to detect surface defects.
- X-ray computed tomography provides high-resolution images to distinguish physical densities.
- Each testing method has its own advantages, disadvantages, and potential areas for improvement.