Ultrasonic inspection of a welded stainless steel pipe to evaluate residual stresses through thickness

Yashar Javadi, Hamed Salimi Pirzaman, Mohammadreza Hadizadeh Raeisi, Mehdi Ahmadi Najafabadi

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35 Citations (Scopus)

Abstract

This study investigates ultrasonic method in axial and hoop stress measurement through thickness of an austenitic stainless steel pipe. Longitudinal critically refracted (LCR) waves are employed to measure the welding residual stresses while outer and inner surfaces of the pipe are inspected by using different frequency range of ultrasonic transducers. The acoustoelastic constant is measured on a plate with the same material and thickness of the investigated pipe to keep the pipe intact. Welding process of the pipe is simulated by a 3D finite element (FE) model which is validated by hole-drilling method performed on 25 points. The residual stresses calculated by FE simulation are then compared with those obtained from the ultrasonic measurement while a good agreement is observed. It is demonstrated that the residual stresses through thickness of the stainless steel pipe can be evaluated by combining FE and LCR method (known as FELCR method).

Original languageEnglish
Pages (from-to)591-601
Number of pages11
JournalMaterials and Design
Volume49
Early online date26 Feb 2013
DOIs
Publication statusPublished - Aug 2013

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Keywords

  • acoustoelastic constant
  • finite element welding simulation
  • longitudinal critically refracted waves
  • through thickness stress measurement
  • ultrasonic stress measurement

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