Comparative study on using ultrasonic array-based techniques for detection of flaws in thick and attenuating materials

Sumana, S. Ponseenivasan, Anish Kumar

Research output: Contribution to journalArticlepeer-review

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 languageEnglish
Pages (from-to)499-510
Number of pages12
JournalTransactions of the Indian Institute of Metals
Volume74
Issue number2
Early online date21 Jan 2021
DOIs
Publication statusPublished - 28 Feb 2021

Keywords

  • nondestructive testing,
  • PWI
  • FMC -TFM
  • Austenitic alloys
  • phased array ultrasonics

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