Crystal plasticity fracture mechanics for early stage fatigue crack propagation in Ni-base superalloys
| Project/Area Number |
26420008
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Materials/Mechanics of materials
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| Research Institution | Tokyo Institute of Technology |
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Principal Investigator |
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| Project Period (FY) |
2014-04-01 – 2017-03-31
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| Project Status |
Completed (Fiscal Year 2016)
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| Budget Amount *help |
¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2016: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2015: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2014: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
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| Keywords | 高温強度 / Ni基超合金 / 疲労き裂進展 / 破壊力学 / 結晶塑性解析 / 結晶方位 / 結晶粒界 / 耐熱超合金 |
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| Outline of Final Research Achievements |
Early stage fatigue crack propagation in Ni-base superalloys was experimentally and analytically investigated. Fatigue crack propagation tests were conducted for a single crystal and a directional solidified superalloy, and clarify effects of crystal orientation, grain boundary and testing temperature on crack propagation behavior. An elastic-plastic and crystal plasticity analysis were carried our based on a finite element model considering realistic crack geometry. It was concluded that trans-granular fatigue crack propagation was rationalized by fracture mechanics parameter that considered slip activities in slip systems in Ni-base superalloys.
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Report
(4 results)
Research Products
(13 results)
