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Ultrasonic testing ( UT) is a family of non-destructive testing techniques based on the propagation of ultrasonic waves in the object or material tested. In most common UT applications, very short ultrasonic pulse waves with centre frequencies ranging from 0.1-15 MHz and occasionally up to 50 MHz, are transmitted into materials to detect ...
Time-of-flight diffraction ( TOFD) method of ultrasonic testing is a sensitive and accurate method for the nondestructive testing of welds for defects. TOFD originated from tip diffraction techniques which were first published by Silk and Liddington [1] in 1975 which paved the way for TOFD. Later works on this technique are given in a number of ...
Phased array ultrasonics ( PA) is an advanced method of ultrasonic testing that has applications in medical imaging and industrial nondestructive testing. Common applications are to noninvasively examine the heart or to find flaws in manufactured materials such as welds. Single-element (non- phased array) probes, known technically as monolithic ...
Delta TechOps (Technical Operations) is the maintenance, repair and overhaul (MRO) division of Delta Air Lines, headquartered at Hartsfield-Jackson International Airport in Atlanta, Georgia. With more than 9,600 employees and 51 maintenance stations worldwide, Delta TechOps is a full-service maintenance provider for the more than 900 aircraft ...
Its inaugural flight — 60 years ago in September 1964 — kicked off a golden era for supersonic aircraft. The plane would later achieve a speed of just over 2,000 miles per hour, nearly 50% ...
Resonant ultrasound spectroscopy ( RUS) is a laboratory technique used in geology and material science to measure fundamental material properties involving elasticity. This technique relies on the fact that solid objects have natural frequencies at which they vibrate when mechanically excited. The natural frequency depends on the elasticity ...
Industrial radiography is a modality of non-destructive testing that uses ionizing radiation to inspect materials and components with the objective of locating and quantifying defects and degradation in material properties that would lead to the failure of engineering structures. It plays an important role in the science and technology needed ...
Ultrasound inspection of welded joints has been an alternative to radiography for nondestructive testing since the 1960s. Ultrasonic inspection eliminates the use of ionizing radiation, with safety and cost benefits. Ultrasound can also provide additional information such as the depth of flaws in a welded joint.