What is the term for ultrasonic waves transmitted into and received from test material in repetitive bursts?

The term for ultrasonic waves transmitted into and received from test material in repetitive bursts is identified as pulse-echo testing. This method involves sending short bursts, or pulses, of ultrasonic energy into the material being inspected. When these pulses encounter a boundary, such as a flaw or the back of the material, they are reflected back to the transducer, allowing for the assessment of internal features and discontinuities.

Pulse-echo testing is fundamental in ultrasonic nondestructive testing because it provides valuable information about the depth and location of flaws within the material. The technique is highly effective for identifying defects without damaging the test specimen, making it a crucial aspect of quality control and material inspection.

The other testing methods mentioned do not refer specifically to this repetitive burst transmission. Through transmission testing involves sending a pulse through the material and receiving it on the opposite side, while angle beam testing refers to using ultrasonic waves at specific angles to detect flaws. Immersion testing involves submerging the test specimen in a liquid couplant to enhance wave transmission, but also does not focus on the burst aspect of pulses.