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Accession number;01A0996827
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| Title;Assessment for material damages by ultrasonic methods. |
| Author;
ARAKAWA TAKAHIRO
(Ihi)
YONEYAMA HIROSHI
(Japan Power Eng. and Insp. Corp.)
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Journal Title;Journal of High Pressure Institute of Japan
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Journal Code:S0913A
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ISSN:0387-0154
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VOL.39;NO.5;PAGE.311-316(2001)
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| Figure&Table&Reference;FIG.7, REF.8 |
| Pub. Country;Japan |
| Language;Japanese |
| Abstract;There is deterioration of the quality of the material caused by the initiation and/or growth of cracks such as fatigue and stress corrosion cracks, and micro-damage such as creep and aging damages accumulated during the long term operation at high temperature. Ultrasonic examination is recognized as the only evaluation technique of the inside damage. While the radiographic examination projects the plane image of the flaw, it cannot measure the flaw height in the plate thickness direction precisely. This paper introduces the ultrasonic TOFD(time-of-flight diffraction) method as the precise monitoring technique of the crack size and the noise analysis method which evaluates material degradation such as creep damage. (author abst.) |
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