Development of heat-resistant ferrous alloys based on new precipitation hardening mechanism
| Project/Area Number |
26289259
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Partial Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Structural/Functional materials
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| Research Institution | Osaka University |
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Principal Investigator |
Yasuda Hiroyuki 大阪大学, 工学(系)研究科(研究院), 教授 (60294021)
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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 |
¥15,860,000 (Direct Cost: ¥12,200,000、Indirect Cost: ¥3,660,000)
Fiscal Year 2016: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2015: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Fiscal Year 2014: ¥11,570,000 (Direct Cost: ¥8,900,000、Indirect Cost: ¥2,670,000)
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| Keywords | 構造・機能材料 / 格子欠陥 / 転位 / 析出強化 / 耐熱合金 |
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| Outline of Final Research Achievements |
In the present study, we succeeded in developing high temperature structural materials composed of (bcc+L21) phases. The L21 phase is precipitated in the bcc matrix in Fe-Al-Ni and Fe-Al-Co single crystals doped with a small amount of Ti and V. The (bcc+L21) alloys show higher strength than ferritic heat-resistant steels. Moreover, <001> dislocations which hardly move in bcc metals can be observed in V-doped crystals. So, the behavior of <001> dislocations in the (bcc+L21) single crystals can be examined. In addition, co-doping of Ti and V leads to a decrease in the misfit strain, which results in high strength at high temperatures.
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Report
(4 results)
Research Products
(16 results)
