| Project/Area Number |
18K14024
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| Research Category |
Grant-in-Aid for Early-Career Scientists
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| Allocation Type | Multi-year Fund |
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| Review Section |
Basic Section 26050:Material processing and microstructure control-related
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| Research Institution | Tohoku University |
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Principal Investigator |
CUI YUJIE 東北大学, 金属材料研究所, 特任助教 (30796214)
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| Project Period (FY) |
2018-04-01 – 2020-03-31
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| Project Status |
Completed (Fiscal Year 2019)
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| Budget Amount *help |
¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
Fiscal Year 2019: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2018: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
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| Keywords | Magnesium / Twin boundary / Pre-strain / Al atoms / Segregation / Magnesium alloys / Twin boundary mobility |
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| Outline of Final Research Achievements |
Twinning is an important deformation mode in Mg alloys. Twin can grow and shrink. The reciprocating movements of twin boundaries have a significant effect on mechanical properties of Mg alloys. The effects of pre-strain and Al atoms on twin boundary motion in Mg and its alloys were investigated. Smaller twins with lower pre-strain exhibit higher twin boundary mobility than larger twins. The Al atoms were found to restrict both twin growth and detwinning.
Our findings indicate that altering pre-strain and alloying element concentration is an effective way to tailor twin boundary mobility, providing a basis for developing Mg alloys with high strength and high damping capacity.
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| Academic Significance and Societal Importance of the Research Achievements |
双晶界面移動度の制御に基づいて、一方で、双晶界面を移動させることにより、Mg合金の減衰能力を高めることができる。一方、双晶界面を固定化することでMg合金の強度を向上させることができる。この研究により、Mg合金の変形メカニズムに関する理解が大幅に向上させ、新たな高強度と高減衰能力のMg合金開発を提案した。
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