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Ultrasonic Inspection of a 9% Ni Steel Joint Welded with Ni-based Superalloy 625: Simulation and Experimentation

Authors :
João da Cruz Payão Filho
Elisa Kimus Dias Passos
Rodrigo Stohler Gonzaga
Ramon Fonseca Ferreira
Daniel Drumond Santos
Diego Russo Juliano
Source :
Metals, Vol 8, Iss 10, p 787 (2018)
Publication Year :
2018
Publisher :
MDPI AG, 2018.

Abstract

The ultrasonic inspection of thick-walled welded joint with austenitic weld metal has proven to be a challenge due to its anisotropic microstructure that can promote ultrasonic waves attenuation. This work aimed to optimize the phased array ultrasonic inspection of the thick-walled joint of a 9% Ni steel pipe welded with Ni-based superalloy 625. The development was carried out by CIVA numeric simulation to preview the beam behavior during the inspection of GTAW (Gas Tungsten Arc Welding)/SMAW (Shielded Metal Arc Welding) joint with anisotropic weld metal. To validate the simulation results, experimental tests were performed with a phased array transducer using longitudinal waves on a calibration block withdrawn from the joint. The configuration of low frequency (2.25 MHz), 16 active elements and a scanning angle of 48° ensured the inspection of the entire joint and the computational simulation proved to be essential for the success of the inspection.

Details

Language :
English
ISSN :
20754701
Volume :
8
Issue :
10
Database :
Directory of Open Access Journals
Journal :
Metals
Publication Type :
Academic Journal
Accession number :
edsdoj.7d1a9f11701e4fd2b472ef080b515031
Document Type :
article
Full Text :
https://doi.org/10.3390/met8100787