What is a benefit of using a linear array in PAUT?

Using a linear array in Phased Array Ultrasonic Testing (PAUT) offers the significant advantage of providing excellent coverage for scanning flat surfaces. This is primarily due to the design of linear arrays, which consist of a series of transducer elements aligned in a straight line. When using a linear array, the emitted ultrasonic waves are able to cover a wide area of the material being inspected. This feature is especially beneficial when examining flat surfaces such as welds, plates, or other geometrical configurations that are consistent and uniform.

Linear arrays allow for the precise control of beam direction and focus, which enhances the ability to detect flaws, variations, or discontinuities in the material. Moreover, the ability to create various angles of incidence with the array improves the chances of detecting flaws oriented in different directions that might be overlooked with other transducer configurations. This efficiency in coverage and detection capability is a key reason why linear arrays are particularly popular for inspecting flat surfaces in various industries.