Sound Velocity
The speed at which ultrasonic waves propagate through a material, varying with material type, density, and stiffness. Longitudinal wave velocities typically range from 2,000 to 7,000 m/s; shear waves travel at 40-60% of longitudinal velocity. Sound velocity is used to calculate distances from time-of-flight measurements. Different materials have different velocities, requiring velocity input for accurate thickness measurements and flaw depth calculations.
The speed at which ultrasonic waves propagate through a material, varying with material type, density, and stiffness. Longitudinal wave velocities typically range from 2,000 to 7,000 m/s; shear waves travel at 40-60% of longitudinal velocity. Sound velocity is used to calculate distances from time-of-flight measurements. Different materials have different velocities, requiring velocity input for accurate thickness measurements and flaw depth calculations.
Physical Foundation
Understanding sound velocity is fundamental to effectively applying NDT methods. Many NDT techniques rely directly on these physical principles.
Practical Impact on Inspections
This principle affects equipment selection, test parameters, inspection procedures, and data interpretation. Proper application requires understanding these physics fundamentals.
Best Practices
- Always follow applicable NDT standards and procedures
- Use properly calibrated and maintained equipment
- Ensure personnel are properly trained and certified
- Document inspection procedures and results completely
- Keep current with industry standards and best practices
Type
Physics
Physical principles governing NDT
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