Basic study on crack inspection technique using vibro-thermography
In recent study, active thermography has reached a high status as an easy and speedy defects inspection method in a NDT field. This paper newly proposes a non-disassembly and non-contact NDT method using a Vibro-Thermography for detecting and evaluating of fatigue cracks at neck parts of the conveya...
| Main Authors: | , |
|---|---|
| Format: | Article |
| Language: | Japanese |
| Published: |
The Japan Society of Mechanical Engineers
2017-01-01
|
| Series: | Nihon Kikai Gakkai ronbunshu |
| Subjects: | |
| Online Access: | https://www.jstage.jst.go.jp/article/transjsme/83/846/83_16-00251/_pdf/-char/en |
| _version_ | 1798015231123783680 |
|---|---|
| author | Yoshiaki NISHINA Daisuke IMANISHI |
| author_facet | Yoshiaki NISHINA Daisuke IMANISHI |
| author_sort | Yoshiaki NISHINA |
| collection | DOAJ |
| description | In recent study, active thermography has reached a high status as an easy and speedy defects inspection method in a NDT field. This paper newly proposes a non-disassembly and non-contact NDT method using a Vibro-Thermography for detecting and evaluating of fatigue cracks at neck parts of the conveyance roll in the steel making plant. In this method, fatigue cracks are detected as localized high temperature areas caused by friction and collision at crack surfaces with an infrared camera, applying a high-amplitude ultrasonic vibration. In this paper, the most suitable nose-shape of horn type transducer, which is contacted with the curved roll surface, is developed for an effective propagation of ultrasonic vibration. In the case of the roll surface is covered with lubricating grease or dust, the crack detectability is shown. Self-reference lock-in data processing technique is applied for improvement of signal noise ratio in the crack detection process. This technique makes it possible to perform correlating process without an external reference signal. Time and cost saving inspection method in the neck part of conveyance roll is carried out using this NDT technique. |
| first_indexed | 2024-04-11T15:30:11Z |
| format | Article |
| id | doaj.art-30ca200597964e25a0e1e3854da910d8 |
| institution | Directory Open Access Journal |
| issn | 2187-9761 |
| language | Japanese |
| last_indexed | 2024-04-11T15:30:11Z |
| publishDate | 2017-01-01 |
| publisher | The Japan Society of Mechanical Engineers |
| record_format | Article |
| series | Nihon Kikai Gakkai ronbunshu |
| spelling | doaj.art-30ca200597964e25a0e1e3854da910d82022-12-22T04:16:09ZjpnThe Japan Society of Mechanical EngineersNihon Kikai Gakkai ronbunshu2187-97612017-01-018384616-0025116-0025110.1299/transjsme.16-00251transjsmeBasic study on crack inspection technique using vibro-thermographyYoshiaki NISHINA0Daisuke IMANISHI1JFE Steel Corp., Mechanical Engineering Research Dept.JFE Steel Corp., Mechanical Engineering Research Dept.In recent study, active thermography has reached a high status as an easy and speedy defects inspection method in a NDT field. This paper newly proposes a non-disassembly and non-contact NDT method using a Vibro-Thermography for detecting and evaluating of fatigue cracks at neck parts of the conveyance roll in the steel making plant. In this method, fatigue cracks are detected as localized high temperature areas caused by friction and collision at crack surfaces with an infrared camera, applying a high-amplitude ultrasonic vibration. In this paper, the most suitable nose-shape of horn type transducer, which is contacted with the curved roll surface, is developed for an effective propagation of ultrasonic vibration. In the case of the roll surface is covered with lubricating grease or dust, the crack detectability is shown. Self-reference lock-in data processing technique is applied for improvement of signal noise ratio in the crack detection process. This technique makes it possible to perform correlating process without an external reference signal. Time and cost saving inspection method in the neck part of conveyance roll is carried out using this NDT technique.https://www.jstage.jst.go.jp/article/transjsme/83/846/83_16-00251/_pdf/-char/eninfraredthermographyvibro-thermographycrackndiultrasonic vibration |
| spellingShingle | Yoshiaki NISHINA Daisuke IMANISHI Basic study on crack inspection technique using vibro-thermography Nihon Kikai Gakkai ronbunshu infrared thermography vibro-thermography crack ndi ultrasonic vibration |
| title | Basic study on crack inspection technique using vibro-thermography |
| title_full | Basic study on crack inspection technique using vibro-thermography |
| title_fullStr | Basic study on crack inspection technique using vibro-thermography |
| title_full_unstemmed | Basic study on crack inspection technique using vibro-thermography |
| title_short | Basic study on crack inspection technique using vibro-thermography |
| title_sort | basic study on crack inspection technique using vibro thermography |
| topic | infrared thermography vibro-thermography crack ndi ultrasonic vibration |
| url | https://www.jstage.jst.go.jp/article/transjsme/83/846/83_16-00251/_pdf/-char/en |
| work_keys_str_mv | AT yoshiakinishina basicstudyoncrackinspectiontechniqueusingvibrothermography AT daisukeimanishi basicstudyoncrackinspectiontechniqueusingvibrothermography |