A material’s ability to support the formation of a magnetic field within itself when subjected to an external magnetic field.

A mode of ultrasonic wave propagation where particles of the medium oscillate parallel to the direction of wave propagation.

A scanning where the transducer or sensor is moved linearly along the surface of the test object to obtain a two-dimensional representation or image of the inspected area.

The distance or gap between the transducer and the surface of the test object in eddy current testing, affecting the detection sensitivity and accuracy, often compensated or adjusted during inspections.

The ability of a non-destructive testing technique to distinguish or resolve closely spaced reflectors or flaws in the perpendicular direction to the beam propagation, often influenced by the wavelength and system parameters.

The property of a material having the same physical or mechanical properties in all directions, allowing waves or forces to propagate equally in all directions.

The boundary or surface between two different materials or phases, where changes in wave propagation, reflections, or other phenomena can occur, often targeted for analysis or inspection in non-destructive testing.

The initial burst or pulse of energy emitted by a transducer in ultrasonic testing, often used as a reference for measuring the travel time and calculating the depth or distance of reflectors within the material.

A signal, mark, or display that suggests the presence of a flaw, defect, or abnormality in a material or component, typically identified during non-destructive testing inspections.

An internal or embedded material within a solid material that is distinct from the surrounding matrix, such as foreign particles or other defects that may affect the material’s integrity or properties.