Inspection of stress corrosion cracking in welded stainless steel pipe using point-focusing electromagnetic-acoustic transducer

Nakamura, Nobutomo; Ashida, Kazuhiro; Takishita, Takashi et al.

NDT & E International, 2016, 83, 88-93

Number of Access:368（2025-08-23 13:32 Counts）

Identifier to cite or link to this item: https://hdl.handle.net/11094/84478

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Title
Inspection of stress corrosion cracking in welded stainless steel pipe using point-focusing electromagnetic-acoustic transducer
Creator
NRID
1000050452404 1000050452404
researchmap permalink
nnakamura nnakamura
Scopus Author ID
7403356186 7403356186
ORCID
0000-0002-5338-842X 0000-0002-5338-842X
CreatorName
Nakamura, Nobutomo
CreatorName
Ashida, Kazuhiro
CreatorName
Takishita, Takashi
NRID
1000090252626 1000090252626
researchmap permalink
read0042771 read0042771
Scopus Author ID
35563683500 35563683500
CreatorName
Ogi, Hirotsugu
NRID
1000080112027 1000080112027
CreatorName
Hirao, Masahiko
Subject
Electromagnetic acoustic transducer
Point focusing
SV wave
Weld
Stress corrosion cracking
Abstract
Point-focusing electromagnetic-acoustic transducers (PF-EMATs) for shear-vertical (SV) waves were developed for crack inspection of stainless-steel pipes. The transducer has improved defect detectability by accumulating SV waves generated by concentric line sources at a focal point in phase. An optimum frequency for defect detection was found to be 2 MHz, with which a crack of 0.5 mm depth near a weld was clearly detected. The EMAT exhibited defect detectability comparable to that of a conventional phased-array piezoelectric transducer, indicating that this new EMAT is highly practical for the non-contacting evaluation of stress-corrosion cracking in stainless steels.
Publisher
Elsevier Ltd
Source Title
NDT & E International
Volume (Issue)
83
Page
88-93
Date of Issued
2016-10
Language
English
Handle URL
https://hdl.handle.net/11094/84478
PISSN
09638695
NCID
AA10816574
Relation.isVersionOf
DOI (Publisher Version)
https://doi.org/10.1016/j.ndteint.2016.06.005
Access Rights
open access
CopyRight
© 2016 Elsevier Ltd. This manuscript version is made available under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
oaire:version
Accepted Manuscript
Category
学術雑誌論文 Journal Article