| 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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| 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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