What is phased array technology primarily used for in NDT?

Phased array technology in non-destructive testing (NDT) primarily focuses on detecting flaws in materials through the use of ultrasonic waves. This method employs an array of ultrasonic transducers that can be individually controlled to emit and receive sound waves at various angles and frequencies. By adjusting the timing of the wave emissions from each transducer in the array, it is possible to steer the ultrasound beam and create detailed images of the internal structure of materials.

This capability allows for precise detection of imperfections, such as cracks, voids, or inclusions, that may compromise the structural integrity of materials. The ability to manipulate multiple beams simultaneously enhances inspection efficiency and provides comprehensive coverage of a test area.

In contrast, the other options—measuring temperature changes, analyzing chemical composition, and determining density—do not align with the fundamental applications of phased array technology, which is specifically centered around ultrasonic flaw detection.