| Project/Area Number |
19F19754
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| Research Category |
Grant-in-Aid for JSPS Fellows
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| Allocation Type | Single-year Grants |
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| Section | 外国 |
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| Review Section |
Basic Section 26050:Material processing and microstructure control-related
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| Research Institution | Nagoya University |
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| Host Researcher |
小橋 真 名古屋大学, 工学研究科, 教授 (90225483)
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| Foreign Research Fellow |
MARTIN VILARDELL ANNA 名古屋大学, 工学(系)研究科(研究院), 外国人特別研究員
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| Project Period (FY) |
2019-11-08 – 2021-03-31
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| Project Status |
Granted (Fiscal Year 2020)
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| Budget Amount *help |
¥1,100,000 (Direct Cost: ¥1,100,000)
Fiscal Year 2020: ¥800,000 (Direct Cost: ¥800,000)
Fiscal Year 2019: ¥300,000 (Direct Cost: ¥300,000)
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| Keywords | 積層造形 |
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| Outline of Research at the Start |
積層造形により超硬合金（サーメット）を造形するための材料開発および基礎研究を実施する。複数の元素（例えばTi,C,Fe,Al）から構成される原料粉末の圧粉体にレーザを一方向に走査した状態で照射する。この時、レーザ照射部分の微視組織を観察し、硬質相（例えばTiC）の状態や結合相（例えばFeAl）の状態などを評価し、レーザ照射条件（出力と走査速度）の関係を明らかにする。また、残留気孔とレーザ照射条件の影響や硬さ試験も実施する。
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| Outline of Annual Research Achievements |
Iron aluminide (Fe3Al) was successfully optimized and manufactured by additive manufacturing (AM) technology. A correlation between laser power, scanning speed and microstructure was found. Therefore, microstructure was deeply analyzed, as well as its mechanical properties (e.g. hardness). Microstructural features and mechanical properties of additively manufactured Fe3Al were compared with the same material obtained by conventional technologies, e.g. powder sintering. Thus, Fe3Al was optimized by Hot-Pressing (HP) conventional technique.
In parallel, a review of additively manufactured iron aluminides has been written and is pending for submission. Additionally, a contribution on a chapter of a book regarding AM technologies has been accepted for publication: 'Structural integrity I: static mechanical properties' in 'Fundamentals of Laser Powder Bed Fusion of Metals'.
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| Current Status of Research Progress |
Current Status of Research Progress
2: Research has progressed on the whole more than it was originally planned.
Reason
一次的にはコロナ禍での活動制限の影響を受けたが，おおむね予定の通り進捗することができた．
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| Strategy for Future Research Activity |
Next step of the project comes with the optimization of Fe3Al/TiC cermet. Cermet powder will be prepared by drum tumbler mixer. The goals are to clarify the relationship between the laser heating conditions, as well as to analyze its microstructure and mechanical properties.
Density measurements will be carried out by cross section analyses and Archimedes method. The correlation between laser parameters and density of the printed parts will be evaluated. Microstructural analyses will be performed on the optimal condition, by means of SEM-EDS, EBSD and XRD. TEM analyses may be considered. Mechanical properties will be evaluated and compared to AM Fe3Al material. Additionally, HP method will be used to manufacture same material, as reference, from a microstructural and mechanical point of view.
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