Fabrication of magnesium alloys with high workability based on systematic understanding of twin-dislocation interaction
| Project/Area Number |
26289257
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Partial Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Structural/Functional materials
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| Research Institution | Kyoto University |
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Principal Investigator |
MABUCHI Mamoru 京都大学, エネルギー科学研究科, 教授 (00358061)
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| Co-Investigator(Kenkyū-buntansha) |
中野 裕美 豊橋技術科学大学, 学内共同利用施設等, 教授 (00319500)
千野 靖正 国立研究開発法人産業技術総合研究所, その他部局等, 研究員 (50357498)
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| Project Period (FY) |
2014-04-01 – 2017-03-31
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| Project Status |
Completed (Fiscal Year 2016)
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| Budget Amount *help |
¥16,900,000 (Direct Cost: ¥13,000,000、Indirect Cost: ¥3,900,000)
Fiscal Year 2016: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2015: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Fiscal Year 2014: ¥12,610,000 (Direct Cost: ¥9,700,000、Indirect Cost: ¥2,910,000)
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| Keywords | マグネシウム / マグネシウム合金 / 双晶 |
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| Outline of Final Research Achievements |
Interaction between twin and dislocation in Mg alloys and the effect of element addition have been investigated for the improvement in workability. Commercially available AZ31 extrusions were multidirectionally compressed for twin generation in the material with high density. The microstructural observations suggested that the geometric compatibility between two types of twins is the determinant for the variant selection. Also, the first-principles calculations and experimental results on the Mg-Zn-X alloys with high Erichsen value revealed that the ratio of general stacking fault energy for basal slip to that for prismatic slip determines macroscopic workability of Mg alloys (with minor exception). Atomic models including double twins and screw dislocation indicated that segregation of added elements critically disturbs the interaction between the twin and dislocation.
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Report
(4 results)
Research Products
(12 results)
