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https://doi.org/10.3938/NPSM.68.369
Ultrasonic Behavior of DMW Considering Actual Shape
New Phys.: Sae Mulli 2018; 68: 369~373
Published online March 30, 2018;  https://doi.org/10.3938/NPSM.68.369
© 2018 New Physics: Sae Mulli.

Taek-Gyu LEE1, Hak-Joon KIM1, Sung-Jin SONG1, Sung-Duk KWON*2

1 School of Mechanical Engineering, Sungkyunkwan University, Suwon 16419, Korea
2 Department of Physics, Andong National University, Andong 36729, Korea
Correspondence to: sdkwon@anu.ac.kr
Received December 15, 2017; Accepted January 6, 2018.
cc This is an open-access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract
Dissimilar metal welds (DMWs) are used to connect different metals together and is generally applied to the welding of stainless steel and carbon steel for the connections of reactor vessels to piping in nuclear power plants. Stainless steel is usually connected via an austenite weld, and carbon steel is bonded to the buttering layer at the interface with the weld. Because of the anisotropy and the complicated shapes of the granular crystals, welded metal parts of different kinds can cause beam distortion in a defect evaluation test using an ultrasonic technique, thereby causing the evaluation to be inaccurate. In this study, ultrasonic wave propagation simulations and ultrasonic tests were carried out in order to improve the reliability of ultrasonic inspections of DMW.
PACS numbers: 43.35.+d
Keywords: Dissimilar metal weld, Ultrasound, Simulation


March 2018, 68 (3)
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