NDT Terminology Flashcards

Front

NDT

Back

none destructive testing

Front

Discontinuity

Back

A lack of continuity or cohesion in the material, such as a flaw

Front

Flaw

Back

An imperfection or discontinuity detectable by NDT but not necessarily rejectable.

Front

Defect

Back

A rejectable flaw

Front

Magnetic Flux Leakage

Back

Distortion of a magnetic field due to the presence of discontinuities.

Front

X-rays / Gamma rays

Back

Ionizing radiation used to penetrate materials and create images of their internal structure.

Front

Density Variation

Back

Darker areas on the radiograph indicate areas of greater radiation penetration (thinner areas or areas with low-density inclusions), while lighter areas represent less radiation penetration

Front

Ultra Sonic Waves

Back

High-frequency sound waves transmitted into the material to detect internal discontinuities.

Front

Magnetic Field Distortion

Back

Changes in the induced magnetic field due to the presence of discontinuities.

Front

Inclustions

Back

Foreign materials trapped within the weld metal, such as slag or tungsten.