| Project/Area Number |
16K14373
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Multi-year Fund |
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| Research Field |
Physical properties of metals/Metal-base materials
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| Research Institution | Tohoku University (2017)
Kyoto University (2016) |
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Principal Investigator |
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| Project Period (FY) |
2016-04-01 – 2018-03-31
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| Project Status |
Completed (Fiscal Year 2017)
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| Budget Amount *help |
¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2017: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2016: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
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| Keywords | 固溶強化 / 原子変位 / 降伏強度 / 固溶体合金 / 格子歪場 / ハイエントロピー合金 / 単結晶X線回折 |
|---|
| Outline of Final Research Achievements |
We have validated the conjecture that the degree of solid solution strengthening in solid-solution alloys should be proportional to the average atomic displacement of the constituent elements by systematically performing first principles calculations to estimate the atomic displacement in (non-)equiatomic high entropy alloys as well as dilute and concentrated binary alloys whose strength has been reported as a function of solute concentration. We have found that the critical resolved shear stress normalized to the shear modulus is in direct proportion to the average atomic displacement normalized to the lattice constant for the investigated solid-solution alloys, indicating that the average atomic displacement can be a universal parameter for predicting the degree of solid solution strengthening regardless of the number of elements, alloy systems, and solute concentration level.
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