Abstract
This paper reports the influence of thickness and material attenuation on volumetric inspection using conventional and advanced ultrasonic array-based techniques through suitable examples. The sensitivity achieved in conventional phased array ultrasonic testing technique with focusing at specific depth using delay laws and advanced array-based techniques for simultaneous focusing at all depths such as Full Matrix Capture-Total Focusing Method and plane wave imaging-TFM are compared in the present study. Finally, experimental results are discussed for advanced ultrasonic array-based techniques for detection and characterization of a 4 mm through wall dimension vertical planar defect (simulating a lack of side wall fusion in a thick narrow gap weld) in a nickel base alloy forging having fine and coarse grains. The sensitivities and signal-to-noise ratio achieved in the different techniques are discussed in detail.
Original language | English |
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Pages (from-to) | 499-510 |
Number of pages | 12 |
Journal | Transactions of the Indian Institute of Metals |
Volume | 74 |
Issue number | 2 |
Early online date | 21 Jan 2021 |
DOIs | |
Publication status | Published - 28 Feb 2021 |
Keywords
- nondestructive testing,
- PWI
- FMC -TFM
- Austenitic alloys
- phased array ultrasonics