2021 Fiscal Year Final Research Report
Creation of high-strength and high-ductility composite steel materials using wire and arc additive manufacturing technique
Project/Area Number |
19K15316
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Research Category |
Grant-in-Aid for Early-Career Scientists
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Allocation Type | Multi-year Fund |
Review Section |
Basic Section 26040:Structural materials and functional materials-related
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Research Institution | National Institute for Materials Science |
Principal Investigator |
KITANO Houichi 国立研究開発法人物質・材料研究機構, 構造材料研究拠点, 主任研究員 (40736972)
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Project Period (FY) |
2019-04-01 – 2022-03-31
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Keywords | 金属3D造形技術 / 複合鉄鋼材料 / 高強度・高延性材料 / アーク溶接 |
Outline of Final Research Achievements |
In this study, the concept of a composite steel material with high strength and high ductility, in which a high-strength (hard) layer and a high-ductility (soft) layer are combined on a millimeter scale, was proposed by applying wire and arc additive manufacturing (WAAM) technique. Specifically, composite steel materials were fabricated using martensitic stainless steel as the high-strength material and austenitic stainless steel as the high-ductility material. The mechanical properties of the fabricated material were evaluated. In addition, the strength, composition and microstructure distribution were evaluated. The results show the feasibility of using the WAAM to fabricate three-dimensional structures with designed strength properties in addition to shape.
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Free Research Field |
金属3D造形技術、アーク溶接技術
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Academic Significance and Societal Importance of the Research Achievements |
本研究は、従来鋼における強度-破断伸び(延性)間のトレードオフ関係を打破することを目指し、金属3D造形技術を活用して、メゾスケールで強度特性制御を行う新しい鋼材設計の概念を提案したものである。本研究で明らかにされた複合鉄鋼材に関する知見をベースとして、軽量かつ高強度、高延性な構造物の製作技術へと展開されることが期待され、鋼構造物を取り扱う産業のカーボンニュートラル化に寄与する成果を得ることができた。
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