| Project/Area Number |
20860011
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| Research Category |
Grant-in-Aid for Young Scientists (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 | Tohoku University |
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Principal Investigator |
LIU Yanghui Tohoku University, 金属材料研究所, COEフェロー (70506469)
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| Project Period (FY) |
2008 – 2009
|
| Project Status |
Completed (Fiscal Year 2009)
|
| Budget Amount *help |
¥3,289,000 (Direct Cost: ¥2,530,000、Indirect Cost: ¥759,000)
Fiscal Year 2009: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2008: ¥1,729,000 (Direct Cost: ¥1,330,000、Indirect Cost: ¥399,000)
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| Keywords | 金属ガラス / MEMS / 機械的性質 / 延性 |
|---|
| Research Abstract |
In this work, we derive a universal scaling law, τ_y=3R・(T_g-RT)/V, that uncovers an inherent relationship of yield strength τ_y with glass transition temperature T_g, molar volume V of metallic glasses and RT the room temperature. This equation is derived from fundamental thermodynamics and validated by various metallic glasses with well-defined yielding. The linearity between τ_y and T_g demonstrates that yielding of metallic glasses is correlated intrinsically with glass-liquid transition instead of melting.
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