Technologies

Ultrasonic Testing (UT) uses high frequency sound energy to conduct examinations and make distance measurements. Ultrasonic inspection can be used for flaw detection and evaluation, dimensional measurements, material characterization and more. The sound energy is introduced and propagates through the materials in the form of waves. When there is a discontinuity in the wave path, part of the energy will be reflected back from the flaw surface. The reflected wave signal is transformed into an electrical signal by the transducer.


Nucleom is your key partner for ultrasonic inspections. UT is a very useful and versatile non destructive testing method that allows for full volumetric examination of your component. Using high-end acquisition instruments and software, our UT operators and analysts can provide complete assessments of your inspected components in 3D. UT can be divided into four major types:


CONVENTIONAL (UT);
In conventional UT, the inspection configuration consists in a single compound of pulser and receiver. The reflected wave signal is displayed on a screen that reflects its strength versus the time that the signal takes from its emission until its reception. Time can be directly related to the distance that the signal traveled. From the signal, information about the reflector location, size, orientation and other features can be obtained.


PHASED ARRAY UT (PAUT);
Phased Array Ultrasonic Testing (PA) is an advanced method of inspection. The term phased refers to the timing and the term array refers to the multiple elements. Alike conventional Ultrasounds techique that emit a signal in a fixed direction, the signal from a phased array probe can be moved electronically, without moving the probe, and can be swept through a wide volume of material at high speed. The signal can be controlled because each elements of the probe can be pulsed individually at a computer-calculated timing. Phased Array allows data encoding, which eliminate operator interpretation variability and enables data remote consulting and analysis.


TIME OF FLIGHT DIFFRACTION (TOFD);
Time-Of-Flight Diffraction (TOFD) method of ultrasonic testing is a sensitive and accurate method for weld inspection. TOFD is a tip-diffraction technique that relies on the principle that the tips of a crack when struck by a wave will diffract the signals back to the other location on the surface. The depth of these tips can be determined from the diffracted energy.


IRIS (INTERNAL ROTARY INSPECTION SYSTEM);
Internal Rotary Inspection System (IRIS) is an ultrasonic method for the inspection of pipes and tubes. The IRIS probe is inserted into a tube that is flooded with water and the probe consists of a rotating mirror that redirects the ultrasonic signal into the tube wall. Data are displayed and recorded as the probe is pulled out. The ultrasonic signal allows detection of defects and metal loss from the inside and outside of the tube.

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