| Project/Area Number |
20K14619
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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 18020:Manufacturing and production engineering-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, 助教 (30796214)
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| Project Period (FY) |
2020-04-01 – 2022-03-31
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| Project Status |
Completed (Fiscal Year 2022)
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| Budget Amount *help |
¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Fiscal Year 2021: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2020: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
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| Keywords | Additive manufacturing / Ti alloy |
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| Outline of Research at the Start |
The powder produced by plasma rotating electrode process (PREP) will be used as the starting powder for the electron beam melting (EBM). We aim to investigate the effects of properties of PREP powder on the mechanical properties of the Ti-6Al-4V alloy by applying EBM. The statistical models among the powder properties, EBM process parameters, and mechanical properties of the EBM-fabricated Ti-6Al-4V alloy will be established. We aim to fabricate a Ti-6Al-4V alloy with superior mechanical properties by optimizing powder properties and process parameters using electron beam melting.
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| Outline of Final Research Achievements |
Ti-6Al-4V alloy powder with high sphericity, fewer satellites and fewer pores was obtained by plasma rotating electrode process (PREP). Controlling the electrode diameter, rotation speed, and plasma current is an effective method to produce PREP powder with appropriate powder size. The limitations of increasing the rotational speed to reduce the powder size were clarified by combining numerical simulation and experiments.
A statistical model was established to clarify the relationships between PREP parameters and average powder size. In addition, the average powder size in the evaluated range could be predicted by this statistical model. Ti-6Al-4V alloy with excellent mechanical properties was fabricated by electron beam additive manufacturing using PREP powder.
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| Academic Significance and Societal Importance of the Research Achievements |
PREP粉末形成におけるPREPパラメータの影響を調査した研究は不足している。さらにはPREP粉末を用いたTi-6Al-4V合金の積層造形に関する研究も少ない。本研究はPREPパラメータが粉末の形成に与える影響を明らかにし、粉末積層造形技術におけるPREP粉末の応用促進を図る。また、本研究で構築された統計モデルは、材料科学におけるデータ科学の応用に新しい方法を示唆している。
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