2016 Fiscal Year Final Research Report
Development of point-focusing EMAT with ultra-high resolution
| Project/Area Number |
15K13834
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Multi-year Fund |
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| Research Field |
Materials/Mechanics of materials
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| Research Institution | Osaka University |
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Principal Investigator |
Hirao Masahiko 大阪大学, 基礎工学研究科, 教授 (80112027)
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| Project Period (FY) |
2015-04-01 – 2017-03-31
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| Keywords | 超音波探傷 |
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| Outline of Final Research Achievements |
We developed the point-focusing electromagnetic acoustic transducer (PF-EMAT) that can detect the stress-corrosion cracking near the weld with high sensitivity and high reproducibility. The PF-EMAT uses shear vertical (SV) waves. It is designed so that SV waves excited from a few sound sources arrive at a focal point in phase, which improved the spatial resolution and enabled us to detect small cracks. By using the PF-EMAT, we detected the slit defect with 0.05-mm depth and the stress-corrosion crack with 0.5-mm depth.
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| Free Research Field |
材料力学
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