Diagnostic Technique for Deterioration Inspection of Metallic Products through the In situ Measurement Using a Thermophysical Handy Tester
This paper proposes a non-destructive technique using a thermophysical handy tester to inspect the deterioration of metallic products. In the early stage of fatigue in a metallic body, many micro-cracks appear on the surface of the stressed body. As fatigue progresses, these micro-cracks multiply an...
| Main Authors: | , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
The Japan Society of Mechanical Engineers
2010-04-01
|
| Series: | Journal of Thermal Science and Technology |
| Subjects: | |
| Online Access: | https://www.jstage.jst.go.jp/article/jtst/5/1/5_1_87/_pdf/-char/en |
| _version_ | 1811329641569320960 |
|---|---|
| author | Kazunori KATO Ichiro TAKAHASHI |
| author_facet | Kazunori KATO Ichiro TAKAHASHI |
| author_sort | Kazunori KATO |
| collection | DOAJ |
| description | This paper proposes a non-destructive technique using a thermophysical handy tester to inspect the deterioration of metallic products. In the early stage of fatigue in a metallic body, many micro-cracks appear on the surface of the stressed body. As fatigue progresses, these micro-cracks multiply and grow, while the apparent thermal conductivity of the surface layer spontaneously decreases. This phenomenon introduces the possibility of determining the progress of deterioration through in situ measurement of thermophysical properties. To estimate the degree of deterioration of materials, a dimensionless deterioration factor α is introduced. In order to corroborate this technique, several fatigue tests using carbon steels were conducted herein. Throughout the tests, apparent thermal conductivities and deterioration factors up to the limit of fatigue were periodically measured using a thermophysical handy tester. Furthermore, microscopic observations to investigate the evolution of micro-cracks were performed for stage-assessment during the period of fatigue tests. The results clearly demonstrate that this technique is useful for the non-destructive diagnosis of such deterioration. |
| first_indexed | 2024-04-13T15:47:23Z |
| format | Article |
| id | doaj.art-4c663a285e814619be3e5232f7bf5ffd |
| institution | Directory Open Access Journal |
| issn | 1880-5566 |
| language | English |
| last_indexed | 2024-04-13T15:47:23Z |
| publishDate | 2010-04-01 |
| publisher | The Japan Society of Mechanical Engineers |
| record_format | Article |
| series | Journal of Thermal Science and Technology |
| spelling | doaj.art-4c663a285e814619be3e5232f7bf5ffd2022-12-22T02:40:55ZengThe Japan Society of Mechanical EngineersJournal of Thermal Science and Technology1880-55662010-04-0151879810.1299/jtst.5.87jtstDiagnostic Technique for Deterioration Inspection of Metallic Products through the In situ Measurement Using a Thermophysical Handy TesterKazunori KATO0Ichiro TAKAHASHI1Shonai College of Industry & TechnologyGraduate School of Science and Engineering, Yamagata UniversityThis paper proposes a non-destructive technique using a thermophysical handy tester to inspect the deterioration of metallic products. In the early stage of fatigue in a metallic body, many micro-cracks appear on the surface of the stressed body. As fatigue progresses, these micro-cracks multiply and grow, while the apparent thermal conductivity of the surface layer spontaneously decreases. This phenomenon introduces the possibility of determining the progress of deterioration through in situ measurement of thermophysical properties. To estimate the degree of deterioration of materials, a dimensionless deterioration factor α is introduced. In order to corroborate this technique, several fatigue tests using carbon steels were conducted herein. Throughout the tests, apparent thermal conductivities and deterioration factors up to the limit of fatigue were periodically measured using a thermophysical handy tester. Furthermore, microscopic observations to investigate the evolution of micro-cracks were performed for stage-assessment during the period of fatigue tests. The results clearly demonstrate that this technique is useful for the non-destructive diagnosis of such deterioration.https://www.jstage.jst.go.jp/article/jtst/5/1/5_1_87/_pdf/-char/endeterioration inspectionin situ measurementnon-destructive inspectionthermophysical handy testerthermal conductivity |
| spellingShingle | Kazunori KATO Ichiro TAKAHASHI Diagnostic Technique for Deterioration Inspection of Metallic Products through the In situ Measurement Using a Thermophysical Handy Tester Journal of Thermal Science and Technology deterioration inspection in situ measurement non-destructive inspection thermophysical handy tester thermal conductivity |
| title | Diagnostic Technique for Deterioration Inspection of Metallic Products through the In situ Measurement Using a Thermophysical Handy Tester |
| title_full | Diagnostic Technique for Deterioration Inspection of Metallic Products through the In situ Measurement Using a Thermophysical Handy Tester |
| title_fullStr | Diagnostic Technique for Deterioration Inspection of Metallic Products through the In situ Measurement Using a Thermophysical Handy Tester |
| title_full_unstemmed | Diagnostic Technique for Deterioration Inspection of Metallic Products through the In situ Measurement Using a Thermophysical Handy Tester |
| title_short | Diagnostic Technique for Deterioration Inspection of Metallic Products through the In situ Measurement Using a Thermophysical Handy Tester |
| title_sort | diagnostic technique for deterioration inspection of metallic products through the in situ measurement using a thermophysical handy tester |
| topic | deterioration inspection in situ measurement non-destructive inspection thermophysical handy tester thermal conductivity |
| url | https://www.jstage.jst.go.jp/article/jtst/5/1/5_1_87/_pdf/-char/en |
| work_keys_str_mv | AT kazunorikato diagnostictechniquefordeteriorationinspectionofmetallicproductsthroughtheinsitumeasurementusingathermophysicalhandytester AT ichirotakahashi diagnostictechniquefordeteriorationinspectionofmetallicproductsthroughtheinsitumeasurementusingathermophysicalhandytester |