DLA

Dual Linear Array 

DLADual Linear Array is an ultrasonic phased array configuration that has two adjacent linear transducer arrays. The DLA has all the benefits of phased array probes: focusing and beam-forming.

As with conventional twin-crystal ultrasonic probes, when the DLA operates in pitch-catch mode, the interface echo is removed and the near-surface resolution increased. This makes it suitable for corrosion mapping. A DLA mounted on a wedge with a roof angle combines the benefits of transmit-receive longitudinal (TRL) probes with the benefits of phased arrays, making it suitable for the inspection of austenitic welds.

For more information on DLA see:
www.olympus-ims.com/en/dual-linear-array-probe
and
https://sonatest.com/resources/application-notes/austenitic-stainless-steel-solution-daah-dual-linear-array-probe-1

WHAT THE HEC?! articles are not intended to be the definitive account on the topic or acronym in question. Readers’ comments and contributions are welcomed. Email: ndtnews@bindt.org