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Electromagnetic Acoustic Resonance To Assess Creep Damage In 2.25Cr-lMo Steel

Published online by Cambridge University Press:  10 February 2011

M. Hirao ,
H. Ogi ,
T. Ohtani  and
T. Morishita
M. Hirao
Affiliation:
Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560, Japan, hirao@me.es.osaka-u.ac.jp, ogi@me.es.osaka-u.ac.jp
H. Ogi
Affiliation:
Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560, Japan, hirao@me.es.osaka-u.ac.jp, ogi@me.es.osaka-u.ac.jp
T. Ohtani
Affiliation:
Ebara Research Co. LTD. Fujisawa, Kanagawa 251, Japan, ohtani05783@erc.ebara.co.jp
T. Morishita
Affiliation:
Depertment of Mechanical Engineering, Akashi College of Technology, Akashi, Hyogo, Japan, morisita@akashi.ac.jp
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Abstract

Method of electromagnetic acoustic resonance (EMAR) was applied to the noncontact measurement of the shear wave attenuation during the creep test of 2.25Cr-1Mo steels. Two electromagnetic acoustic transducers were manufactured for this purpose, which generate the polarized shear waves through the magnetostriction effect. The attenuation coefficient increased with the creep deformation. The evolution range of the attenuation was beyond 0.1 μs−1 before the failure, which was much larger than the attenuation variation among the samples.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 503: Symposium JJ – Nondestructive Characterization of Materials in Aging Systems , 1997 , 31
Copyright
Copyright © Materials Research Society 1998

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References

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