In-situ monitoring of ultrasonic attenuation during rotating bending fatigue of carbon steel with electromagnetic acoustic resonance

Ogi, Hirotsugu; Hamaguchi, Takayuki; Hirao, Masahiko

Journal of Alloys and Compounds, 2000, 310(1-2), 436-439

Number of Access:788（2025-10-09 11:45 Counts）

Identifier to cite or link to this item: https://hdl.handle.net/11094/84477

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Title
In-situ monitoring of ultrasonic attenuation during rotating bending fatigue of carbon steel with electromagnetic acoustic resonance
Creator
NRID
1000090252626 1000090252626
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Scopus Author ID
35563683500 35563683500
CreatorName
Ogi, Hirotsugu
CreatorName
Hamaguchi, Takayuki
NRID
1000080112027 1000080112027
CreatorName
Hirao, Masahiko
Abstract
Using electromagnetic acoustic resonance (EMAR), we studied the evolution of the surface-shear-wave attenuation and phase velocity during rotating bending fatigue of a 0.45% C steel. In the EMAR method, we used a magnetostrictively-coupled electromagnetic acoustic transducer (EMAT) for the contactless measurements of the axial shear wave that is a surface-shear wave, propagating in a cylinder-specimen circumference direction with the axial polarization. The attenuation coefficient always showed sharp peaks around 90% of the fatigue life, independent of the fatigue-stress amplitude. In addition to the ultrasonic measurements, we made crack-growth observations using replicas and measured recovery of attenuation and velocity after stopping the cyclic loading just before and after the peak. From these results, we concluded that the evolution of the ultrasonic properties is caused by a drastic change in dislocation mobility being accompanied by the crack growth.
Publisher
Elsevier Science S.A.
Source Title
Journal of Alloys and Compounds
Volume (Issue)
310(1-2)
Page
436-439
Date of Issued
2000-09-28
Language
English
Handle URL
https://hdl.handle.net/11094/84477
PISSN
09258388
NCID
AA10817249
AA11532583
Relation.isVersionOf
DOI (Publisher Version)
https://doi.org/10.1016/S0925-8388(00)01020-3
Access Rights
open access
CopyRight
© 2000 Elsevier Science S.A. 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