| Project/Area Number |
06650084
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| Research Category |
Grant-in-Aid for General Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Research Field |
Materials/Mechanics of materials
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| Research Institution | Ibaraki University |
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Principal Investigator |
SUZUKI Hideto Ibaraki Univetsity, Faculty of Engineering, Professor, 工学部・システム工学科, 教授 (30090369)
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| Co-Investigator(Kenkyū-buntansha) |
KANEKO Ryouichi Hitachi Ltd., Chief Engineer, 日立工場・火力設計部, 副技師長
TOMOTA You Ibaraki Univetsity, Faculty of Engineering, Professor, 工学部・物質工学科, 教授 (90007782)
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| Project Period (FY) |
1994 – 1995
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| Project Status |
Completed (Fiscal Year 1995)
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| Budget Amount *help |
¥2,000,000 (Direct Cost: ¥2,000,000)
Fiscal Year 1995: ¥300,000 (Direct Cost: ¥300,000)
Fiscal Year 1994: ¥1,700,000 (Direct Cost: ¥1,700,000)
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| Keywords | Image Processing / Heat-resisted superalloy / Creep-fatigue / SEM Servo / Reliability Evaluation / Syngle Crystal / Fatigue Crack / 疲労き裂 / 結晶制御 / EWS / 予防システム / 破壊機構 / SEM / 信頼性解析 / 健全性 |
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| Research Abstract |
In the present reserch, the high-temperature fatigue crack growth behavior of Ni-base super alloy and its mechanism were made clear through in-situ observation by SEM servo (the newcomplex apparatus of scanning electron microscope and electro-hydraulic fatigue testing machine).
Besides, the specimens are the Ni-base polycrystalline superalloy Hastelloy-X and the Ni-base single crystal super alloy CMSX-4.
High-temperature high-cycle fatiguecrack growth tests and high-cycle fatigue test are preformed in Ni-based polycrystalline super alloy Hastelloy-X.And in-situ observation on the behavior of the micro crack initiation and propagation. Then, the mechanism of the crack growth was investigated. And the dupendence of the cyclic load frequence on the fatigue life wasinvestigated. Furthermore, we focused on the behavior of the micro crack initiation and propagation, and tried to construct the residual life assessment. And the damage process of the singlecrystal CMSX-4 which has initial anisotropy was investigatedunder the condition of high-temperature and cyclic load by using SEM servo, and the behavior of the crack propagation was investigated.
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