2022 Fiscal Year Final Research Report
Microstructure control of magnesium alloy by dieless drawing with non-uniform temperature and strain rate
| Project/Area Number |
19H02476
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Review Section |
Basic Section 26050:Material processing and microstructure control-related
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| Research Institution | The University of Tokyo |
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Principal Investigator |
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| Project Period (FY) |
2019-04-01 – 2023-03-31
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| Keywords | ダイレス引抜き / マグネシウム合金 / 結晶組織制御 / その場観察 / 生体吸収性材料 |
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| Outline of Final Research Achievements |
In this study, we focused on plastic deformation phenomena in the characteristic "non-uniform field" observed in dieless drawing, and developed a new metal forming method induced by non-uniform temperature, strain rate, and strain fields, as well as a method to control twinning-induced crystal structure. We intentionally make non-uniform temperature, strain rate, and strain fields, continuously observe plastic deformation and microstructural changes. A new method to control the microstructure associated with plastic deformation and twin formation in non-uniform temperature, strain rate, and strain fields is proposed. These methods to the development of high-performance small and thin-walled magnesium alloy tubes with fine crystal grains by die-less drawing can be developed.
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| Free Research Field |
塑性加工
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| Academic Significance and Societal Importance of the Research Achievements |
本研究で開発した結晶組織制御法に基づくダイレス引抜き加工方法は，血管狭窄症などを治癒する生体吸収性マグネシウムステントに応用することが可能である．血管内で治癒後にステントが分解されるため，ステント除去の再手術が不要であり，患者のクオリティライフの向上に寄与できる．
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