Flaw Depth Determination
Flaw depth determination is a method to find the vertical location of an internal defect relative to the surface through geometric time-of-flight analysis.
Physical-Chemical Mechanism of Action
Flaw depth determination relies on the principle that sound waves reflect from an internal defect, and the time for these waves to return is proportional to the defect depth. By measuring this time, the depth can be calculated.
Metallurgical Relevance & Welding Risks
Incorrect flaw depth determinations can lead to inaccurate repairs, which can cause further defects and potential cracks in the component. It is essential that the measurement is precise to ensure the defect is correctly identified and handled.
Shop Practice & Instructions
To get an accurate flaw depth determination, follow these steps:
1. Use a high-resolution ultrasonic device to measure the time of flight.
2. Ensure the device is properly calibrated and measurements are taken in a quiet environment.
3. Note the measured time and calculate the defect depth with the formula: Depth = (Time × Sound Velocity) / 2.