Improvement of strength at both ambient and high temperatures by formation of modulated structure distribution by RBT.
| Project/Area Number |
15K06499
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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 |
Material processing/Microstructural control engineering
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| Research Institution | Hirosaki University |
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Principal Investigator |
SATO HIROYUKI 弘前大学, 理工学研究科, 教授 (10225998)
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| Project Period (FY) |
2015-04-01 – 2018-03-31
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| Project Status |
Completed (Fiscal Year 2017)
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| Budget Amount *help |
¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2017: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2016: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2015: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
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| Keywords | クリープ / 高温変形 / クリープ曲線 / ひずみ加速指数 / 遷移クリープ / 寿命予測 / アルミニウム合金 / 組織勾配 / 回転曲げ / 硬度分布 / 応力分布 / 複合負荷 / 変調組織 / 強度特性 / 高温強度 |
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| Outline of Final Research Achievements |
To improve creep strength, macroscopic distribution of microstructure is formed by combination of rotary-bending and tensile loading, named RBT-loading (Rotary-Bend and Tensile loading) in aluminum alloys. Shape of creep curve in transient creep regime are influenced by RBT-loading, and creep curve show complex behavior when microstructural distribution is formed. It is suggested that creep strength in primary regime can be improved by combination of RBT-loading and heat treatment.
Creep curves are analyzed by Strain-Acceleration and Transition Objective Index (SATO-Index). It is shown that the entire creep curve of alloys including complex primary behavior can be reconstructed by a method of SATO-Index with section partitioning.
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Report
(4 results)
Research Products
(11 results)
