| Project/Area Number |
25820364
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Material processing/Microstructural control engineering
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| Research Institution | Tohoku University |
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Principal Investigator |
ANDO Daisuke 東北大学, 工学(系)研究科(研究院), 助教 (50615820)
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| Project Period (FY) |
2013-04-01 – 2015-03-31
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| Project Status |
Completed (Fiscal Year 2014)
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| Budget Amount *help |
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2014: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Fiscal Year 2013: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
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| Keywords | マグネシウム / スカンジウム / 二相組織 / 時効硬化 / 二相組織制御 / マグネシウム合金 / 高強度 / 高延性 |
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| Outline of Final Research Achievements |
In this study, the mechanical properties, especially Vickers hardeness, were investitagted in various Mg-Sc alloys with hcp single phase, bcc single phase and hcp+bcc dual phase. These Vickers hardeness were 115Hv for hcp, 100Hv for bcc. After aging treatment at 473 K for 18 ks in Mg-16.8at%Sc, the maximum Vickers hardness was 231.5Hv which is highest value in Mg based alloy expected for metallic glass. The hardening mechanism was discussed according to TEM, SEM/EBSD and XRD results. This significant age-hardening could be explained by the solid-solution hardening of Sc in Mg and the grain refinement hardening by the nano-size hcp precipitates.
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