The development of simplified ultrasonic CT system and its application to the evaluation of weld metal

Citation
Kc. Kim et al., The development of simplified ultrasonic CT system and its application to the evaluation of weld metal, KSME INT J, 15(1), 2001, pp. 52-60
Citations number
15
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Mechanical Engineering
Journal title
KSME INTERNATIONAL JOURNAL
ISSN journal
1226-4865 → ACNP
Volume
15
Issue
1
Year of publication
2001
Pages
52 - 60
Database
ISI
SICI code
1226-4865(200101)15:1<52:TDOSUC>2.0.ZU;2-7
Abstract
In this paper, as a new measurement method to estimate the change of materi al condition, the simplified ultrasonic CT system, which uses the informati on of three directions, that is, 90 degrees, + 45 degrees and -45 degrees a bout inspection plane is proposed. Use of simplified CT system has two meri ts: Firstly, the measurement time is very short compared with general CT. S econdly, it can detect sensitively small defect in vertical or slant direct ion about inspection plane because the obtained image is CT image calculate d from three directions. From these merits, this method can be considered a s an effective method to evaluate material conditions. The basic performanc e of the proposed method was confirmed through several specimens with sever al simple defects. In order to confirm the applicability of actual NDT, sev eral kinds of welded specimens are investigated. The result showed that the CT image obtained had good agreement with actual defect of specimens.