Brand:QHR
Quantity:1000
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TOFD1 Testing Block, TOFD2 Testing Block... ...Made of Steel,SS,Aluminum.
Time of Flight Diffraction (TOFD) is one of the methods used for flaw detection and sizing. Of all the ultrasonic crack sizing methods, TOFD is the most accurate methods. The inspection employs two longitudinal wave (L-wave) angle beam transducers arranged symmetrically opposite facing each other, straddling the weld or base material under test. One probe acts like a transmitter of ultrasonic energy while the other probe receives the ultrasound energy. The transducer, pulser, and amplifier characteristics are selected to generate as broad distribution of energy as possible over the material under test providing full weld coverage. A single-axis scan (that is, along the weld), with a position encoder records the position of the weld and enables the display of digital images in real time.
