Non Destructive Evaluation
Nondestructive Evaluation (NDE) is a term that is often used interchangeably with NDT. However, technically, NDE is used to describe measurements that are more quantitative in nature.
For example, a NDE method would not only locate a defect, but it would also be used to measure something about that defect such as its size, shape, and orientation.
NDE may be used to determine material properties such as fracture toughness, formability, and other physical characteristics.
The number of NDT methods that can be used to inspect components and make measurements is large and continues to grow.
Researchers continue to find new ways of applying physics and other scientific disciplines to develop better NDT methods.
However, there are six NDT methods that are used most often. These methods are visual inspection, penetrant testing, magnetic particle testing, electromagnetic or eddy current testing, radiography, and ultrasonic testing.
These methods and a few others are briefly described below.