金属材料・半導体材料の凝固・結晶成長ダイナミクスの研究に取り組んでいます。大型放射光施設で得られる高輝度X線を活用したリアルタイムイメージング・回折などの計測手法の開発・複合化を行い、それらを駆使して凝固・結晶成長現象をありのまま観察し、観察事実に基づいた新たな材料プロセスの創出を目指しています。

1. T. Narumi, M. Ohta, K. Fujita, R. Katsube and H. Yasuda: “Equiaxed Solidification of Metastable Ferrite in Fe–22mass%Mn–0.7mass%C–0.3mass%Ti Alloy Nucleating on Ti Carbonitride”, Tetsu-to-Hagane, 111(2025), 163. https://doi.org/10.2355/tetsutohagane.TETSU-2024-125
2. T. Narumi, M. Ohta, K. Fujita, R. Katsube and H. Yasuda: “Nucleation-controlled Selection of Metastable Ferrite in Solidification of Fe-22mass%Mn-0.7mass%C Alloy”, ISIJ International, 64(2024), 1758. https://doi.org/10.2355/isijinternational.ISIJINT-2024-185
3. T. Narumi, T. Nakata, R. Kobayashi and H. Yasuda: “Time-resolved and in-situ Observation of Semisolid Deformation in Al–Cu Alloys with Equiaxed and Columnar Grain Structures by Using a Combination Technique of 4D-CT and 3DXRD”, ISIJ International, 61(2021), 1567. https://doi.org/10.2355/isijinternational.ISIJINT-2020-650
4. T. Narumi, T. Kawarasaki, Y. Kato, K. Morishita and H. Yasuda: “Quantitative analysis of solidification of equiaxed grains in Al-Cu alloy refined by inoculant TiB2 particles with using time-resolved X-ray tomography”, Journal of Japan Institute of Light Metals, 70(2020), 339. https://doi.org/10.2464/jilm.70.339
5. K. Nakano, T. Narumi, K. Morishita and H. Yasuda: “Characterization of growing dendrites in CrMnFeCoNi high-entropy alloy by time-resolved and in-situ tomography”, Materials Transaction, 61(2020), 596. https://doi.org/10.2320/matertrans.MT-MK2019006