2019 Fiscal Year Annual Research Report
Physical and Numerical Simulation of Hot Stamping for Hybrid Steel-Composite Lightweigh t Bodies
| Project/Area Number |
17F17067
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| Research Institution | The University of Tokyo |
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Principal Investigator |
柳本 潤 東京大学, 大学院工学系研究科(工学部), 教授 (90220194)
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| Co-Investigator(Kenkyū-buntansha) |
TAYLOR THOMAS 東京大学, 工学(系)研究科(研究院), 外国人特別研究員
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| Project Period (FY) |
2017-10-13 – 2020-03-31
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| Keywords | 繊維強化樹脂 / 熱間成形 / 製造加工 / 高強度鋼板 / 合金設計 / 内部組織最適化 / ハイブリッドジョイニング / 工業的適用 |
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| Outline of Annual Research Achievements |
Following development a new one-step integrated forming, curing and joining process for manufacturing Press Hardened Steel (PHS) and CFRP hybrid parts (2017-18), a new experimental steel chemistry was cast in collaboration with the Steel & Metals Institute at Swansea University (UK). The experimental steel chemistry contains a novel combination of Si, Al, P, Nb and B additions in order to optimise microstructural evolution, marked by retention of austenite within a bainitic ferrite matrix, during a new Transformation Induced Plasticity (TRIP) assisted PHS part manufacturing process. Crucially, the steel chemistry maintains industrial manufacturer friendless. Development of the new TRIP assisted PHS technology was developed, involving press hardening experiments, mechanical testing and microstructural characterisation of formed parts in order to determine and optimise the relationship between process parameters, microstructure and mechanical properties. Following optimisation, the new TRIP assisted PHS technology was combined with the new one-step process for PHS-CFRP hybrid parts. The technology permits economical manufacturing of lightweight parts for safety-critical automotive applications, in turn promoting safer and lighter vehicles. The results are to be published over two journal papers and one conference paper (currently under peer-review).
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| Research Progress Status |
令和元年度が最終年度であるため、記入しない。
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| Strategy for Future Research Activity |
令和元年度が最終年度であるため、記入しない。
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| Remarks |
東京大学大学院工学系研究科 柳本研究室
http://www.cem.t.u-tokyo.ac.jp/
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