Welding and Material Testing Terms

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Bend Test

Back

Common destructive test where the sample of weld and surrounding base metal is bent and checked for cracks.

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Brinell Hardness Testing Machine

Back

Machine with indenter built into the press. The indenter is pressed into sample for a set amount of time, the load is removed, the diameter of the indentation is measured.

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Charpy V-notch

Back

A standard impact test used to measure material toughness.

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Chemical Analysis

Back

A test that determines the chemical makeup of a metal.

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Couplant

Back

Material placed between a transducer and metal test surface during an ultrasonic test.

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Critical Defect Size

Back

Maximum allowable size of a discontinuity before it’s considered a defect.

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Destructive Testing

Back

Testing a sample until it fails. Used to determine the physical properties of a weld and predict its service life.

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Discontinuity

Back

Interruption in the normal crystalline lattice structure of a metal.

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Ductility

Back

The ability of a material to be changed in shape without cracking or breaking.

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Eddy Current Inspection (ET)

Back

A method that uses alternating current coil to induce eddy currents into a part. A discontinuity in a part interrupts the flow of eddy currents.