| 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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| Co-Investigator(Kenkyū-buntansha) |
中村 暢伴 大阪大学, 基礎工学研究科, 助教 (50452404)
荻 博次 大阪大学, 基礎工学研究科, 准教授 (90252626)
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| Project Period (FY) |
2015-04-01 – 2017-03-31
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| Project Status |
Completed (Fiscal Year 2016)
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| Budget Amount *help |
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2016: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2015: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
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| Keywords | 超音波探傷 / 電磁超音波センサ |
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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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