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  2. Time-of-flight diffraction ultrasonics - Wikipedia

    en.wikipedia.org/wiki/Time-of-flight_diffraction...

    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 ...

  3. Ultrasonic pulse velocity test - Wikipedia

    en.wikipedia.org/wiki/Ultrasonic_pulse_velocity_test

    An ultrasonic pulse velocity test is an in-situ, nondestructive test to check the quality of concrete and natural rocks. In this test, the strength and quality of concrete or rock is assessed by measuring the velocity of an ultrasonic pulse passing through a concrete structure or natural rock formation. This test is conducted by passing a pulse ...

  4. Acoustic resonance technology - Wikipedia

    en.wikipedia.org/wiki/Acoustic_resonance_technology

    Acoustic resonance technology ( ART) is an acoustic inspection technology developed by Det Norske Veritas over the past 20 years. ART exploits the phenomenon of half-wave resonance, whereby a suitably excited resonant target (such as a pipeline wall) exhibits longitudinal resonances at certain frequencies characteristic of the target's thickness.

  5. Rail inspection - Wikipedia

    en.wikipedia.org/wiki/Rail_inspection

    Rail inspection is the practice of examining rail tracks for flaws that could lead to catastrophic failures. According to the United States Federal Railroad Administration Office of Safety Analysis, [1] track defects are the second leading cause of accidents on railways in the United States.

  6. Plastic weld non-destructive examination - Wikipedia

    en.wikipedia.org/wiki/Plastic_weld_non...

    A variety of non-destructive examination (NDE) techniques are available for inspecting plastic welds. Many of these techniques are similar to the ones used for inspecting metal welds. Traditional techniques include visual testing, radiography, and various ultrasonic techniques. [1] Advanced ultrasonic techniques such as time of flight ...

  7. Nondestructive testing - Wikipedia

    en.wikipedia.org/wiki/Nondestructive_testing

    Nondestructive testing ( NDT) is any of a wide group of analysis techniques used in science and technology industry to evaluate the properties of a material, component or system without causing damage. [1] The terms nondestructive examination ( NDE ), nondestructive inspection ( NDI ), and nondestructive evaluation ( NDE) are also commonly used ...

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