Research Papers: NDE

Ultrasonic Evaluation of Welding Residual Stresses in Stainless Steel Pressure Vessel

[+] Author and Article Information
Yashar Javadi

Ph.D. Candidate
e-mail: yashar_javadi@aut.ac.ir

Hamed Salimi Pirzaman

MSc. Student
e-mail: hamedsalimi66@gmail.com

Mohammadreza Hadizadeh Raeisi

BSc. Student
e-mail: m.r.hadizadeh.r@gmail.com

Mehdi Ahmadi Najafabadi

Associate Professor
e-mail: ahmadin@aut.ac.ir
Department of Mechanical Engineering,
Amirkabir University of Technology,
424 Hafez Avenue,
Tehran 15875-4413, Iran

1Corresponding author.

Contributed by the Pressure Vessel and Piping Division of ASME for publication in the Journal of Pressure Vessel Technology. Manuscript received September 14, 2012; final manuscript received December 11, 2012; published online June 11, 2013. Assoc. Editor: Jianmin Qu.

J. Pressure Vessel Technol 135(4), 041502 (Jun 11, 2013) (6 pages) Paper No: PVT-12-1148; doi: 10.1115/1.4023432 History: Received September 14, 2012; Revised December 11, 2012

This paper investigates ultrasonic method in stress measurement of a pressure vessel made of austenitic stainless steel 304 L. Longitudinal critically refracted (LCR) waves are employed to measure the welding residual stresses. The acoustoelastic constant is measured through a hydro test while the pressure vessel is kept intact. Hole-drilling method is used to verify the results of ultrasonic measurement corresponding to axial and hoop residual stresses of the pressure vessel. The results show good agreement between hole-drilling and ultrasonic stress measurements which is accomplished nondestructively.

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Grahic Jump Location
Fig. 1

LCR wave propagated in the stainless steel pipe through the PMMA wedge

Grahic Jump Location
Fig. 2

Pressure vessel dimensions

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Fig. 3

Measurement devices for TOF measurement

Grahic Jump Location
Fig. 4

Hydro test setup to measure acoustoelastic constant of the pressure vessel

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Fig. 5

Results of hydro test to evaluate hoop acoustoelastic constant

Grahic Jump Location
Fig. 6

Results of hydro test to evaluate the axial acoustoelastic constant

Grahic Jump Location
Fig. 7

Axial residual stresses of the pressure vessel measured by the ultrasonic and hole-drilling method

Grahic Jump Location
Fig. 8

Hoop residual stresses of the pressure vessel measured by the ultrasonic and hole-drilling method




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