| Project/Area Number |
23860030
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| Research Category |
Grant-in-Aid for Research Activity Start-up
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| Allocation Type | Single-year Grants |
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| Research Field |
Structural/Functional materials
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| Research Institution | Osaka University |
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Principal Investigator |
TODAI Mitsuharu 大阪大学, 大学院・工学研究科, 助教 (10610800)
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| Co-Investigator(Renkei-kenkyūsha) |
NAKANO Takayoshi 大阪大学, 大学院・工学研究科, 教授 (30243182)
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| Project Period (FY) |
2011 – 2012
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| Project Status |
Completed (Fiscal Year 2012)
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| Budget Amount *help |
¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Fiscal Year 2012: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2011: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
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| Keywords | 生体材料 / β型Ti合金 / 単結晶 / ω相変態 / 力学特性 / 疲労試験 / ω相 / チタン合金 |
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| Research Abstract |
Ti-xNb alloys have the composition dependence of the phase stability of βphase. The Ti-xNb alloy with low βphase stability exhibits anomalous temperature dependence of the electrical resistivity, low Debye temperature and elastic softening. Thus, it can be reduced the Young’s modulus by controlling βphase stability in these alloys. The βphase stability also effect on the plastic deformation in Ti-xNb alloys. The Ti-xNb alloy with low βphase stability exhibits characteristics S-S curve. This means that the ωphase is precipitated by motion of dislocation. This phenomena more clearly appear in Ti-xNb alloy single crystal by fatigue experiments. Moreover, we found that the precipitation of ωphase leads to anomalous softening.
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