| Budget Amount *help |
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2016: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2015: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2014: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
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| Outline of Final Research Achievements |
In this study, the effects of heterogeneous structure caused by elemental segregation of Mo such as swirly segregation (VGS structure) on fracture toughness of beta type Ti-Mo alloys were investigated. Basic studies on the effects of segregation structure on mechanical properties (ductility and fracture toughness) and deformation mechanism were also performed. Heterogeneous precipitation of omega phase (hard second phase) corresponding to segregation structure enhanced the Charpy absorbed energy. Enhancement of Charpy absorbed energy was remarkable at 473K, while tensile ductility enhanced especially at room temperature. Heterogeneous omega phase precipitation due to segregation structure also enhanced room temperature fracture toughness values.
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