Non-Destructive Testing

How we test parts to measure their strength, durability and quality – without destroying them in the process

Non-Destructive Testing for Quality Assurance

Non-destructive testing (NDT) is a set of methods used to inspect, test, and evaluate components without causing damage or altering their future usefulness.

It is used to detect internal or external defects like cracks, pores, or corrosion, and to ensure the quality, safety and structural integrity of a product before it is released. Examples of NDT methods include:

Visual and dimensional inspection
Ultrasonic and X-ray inspection
Leak and pressure testing
Dye penetrant testing
Magnetic particle testing.

These methods are essential for ensuring part reliability, especially for our customers’ mission-critical applications in aerospace, medical and robotics.

Our Non-Destructive Testing Capabilities

We use a variety of NDT methods to validate the integrity of the parts we produce. Here are some examples.

Dimensional Inspection

Dimensional inspection measures a manufactured part and compares the results against its design specifications to ensure it meets all required tolerances. This involves checking geometric features like length, width, height and angles using tools like calipers, Coordinate Measuring Machines (CMMs) and 3D scanners.

Ultrasonic Inspection

This testing method uses high-frequency sound waves to find flaws in manufactured parts, like cracks, voids and inclusions. A transducer sends sound waves into the material, and a receiver analyzes the reflected waves to measure the thickness and identify internal discontinuities.

X-ray Inspection

This non-destructive testing method is used to examine the internal structure of a product to find hidden defects like cracks and voids. X-rays are passed through the part, and a detector captures the resulting image, which shows variations in density.

Leak & Pressure Testing

This process ensures a part or assembly is sealed and can withstand its intended operating pressure without leaks. This is done by sealing the part, introducing a pressurized fluid or gas and then monitoring for any pressure drop over time, which would indicate a leak.

Magnetic Particle Testing

This is a non-destructive method used to find surface and near-surface flaws in manufactured parts made of ferromagnetic materials like iron or steel. The part is first magnetized. Magnetic particles are then applied to the surface of the part. They accumulate at any discontinuities, revealing them.

Ask a Fathom Expert