Institute of Science Tokyo, Department of Materials Science and Engineering

Kobayashi Satoru Laboratory

Japanese / English
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Reliability Assessment and Innovative Materials Design of Heat-Resistant Alloys for the 2050 Energy Transformation

 Publications

2024

  1. S. Kobayashi, T. Tsuya, Creep behaviors of alloy 718 type Ni-based superalloys, Proc. of the 10th International Conference on Advances in Materials, Manufacturing & Repair for Power Plants, ASM international, 2024.

2023

  1. S. Kobayashi, Grain Size Dependence of Secondary Creep Rate in Pure Metals and Single-phase Alloys, Tetsu-to-Hagane 109(3) (2023) 150-157 https://doi.org/10.2355/tetsutohagane.TETSU-2022-091
  2. H. Nakashima, J. Yu, M. Takeyama, Experimental phase diagram study of the TiAl-rich part of the Ti-Al-Ni ternary system, Calphad 80 (2023) 102521 https://doi.org/10.1016/j.calphad.2022.102521

2022

  1. S. Ida, R. Yamagata, H. Nakashima, S. Kobayashi, M. Takeyama, Grain Boundary Precipitation Control of GCP Phase Using TCP or A2 Phase in Ni-Based Alloys, Metals 12(11) (2022) 1817 , https://doi.org/10.3390/met12111817
  2. K. Tokutomi, K. Sagitani, S. Kobayashi, Alloying Effects on the Stability of D022 γ”-Ni3M (M: Nb, Ta, V) Precipitates at Elevated Temperatures in Alloy 718 Type Ni-Based Alloys, Metals, 12(8) (2022) 1251, https://doi.org/10.3390/met12081251
  3. S. Oh, H. Nakashima, R. Yamagata, S. Kobayashi, M. Takeyama, Effects of Zr Addition on Precipitation and Stability of Fe2Nb Laves and Ni3Nb Phases in Novel Fe-Cr-Ni-Nb Austenitic Heat-resistant Steels, ISIJ International 62(6) (2022) 1258-1267, https://doi.org/10.3390/met12081251
  4. Z. Yuan, S. Kobayashi, Determination of Phase Equilibria among δ-Fe, γ-Fe and Fe2M Phases in Fe-Cr-M (M: Hf, Ta) Ternary Systems, Metals 12(1) (2022) 102, https://doi.org/10.3390/met12010102
  5. H. Nakashima, A. Kinouchi, M. Takeyama, Quantitative analysis of oxygen in solution in the Ti-Al-O ternary alloys by soft X-ray emission spectroscopy, Journal of Alloys and Compounds 920 (2022) 165822, https://doi.org/10.1016/j.jallcom.2022.165822
  6. A. Shaaban, H. Nakashima, M. Ueda, M. Takeyama, Effects of oxygen addition on the microstructure, phase transformations, and oxidation resistance of TiAl alloys, Journal of Alloys and Compounds 918 (2022) 165716, https://doi.org/10.1016/j.jallcom.2022.165716

2021

  1. S. Kobayashi, T. Hara, Effect of Different Precipitation Routes of Fe2Hf Laves Phase on the Creep Rate of 9Cr-Based Ferritic Alloys, Applied Sciences 11(5) (2021) 2327, https://doi.org/10.3390/app11052327
  2. A. Shaaban, L.J. Signori, H. Nakashima, M. Takeyama, Effects of the addition of transition metals on phase equilibria and phase transformations in TiAl systems in between 1473 and 1073 K, Journal of Alloys and Compounds 878 (2021) 160392, https://doi.org/10.1016/j.jallcom.2021.160392
  3. K. Cho, H. Odo, K. Okamoto, H.Y. Yasuda, H. Nakashima, M. Takeyama, T. Nakano, Improving the Tensile Properties of Additively Manufactured β-Containing TiAl Alloys via Microstructure Control Focusing on Cellular Precipitation Reaction, Crystals 11(7) (2021) 809, https://doi.org/10.3390/cryst11070809
  4. K. Cho, H. Kawabata, T. Hayashi, H.Y. Yasuda, H. Nakashima, M. Takeyama, T. Nakano, Peculiar microstructural evolution and tensile properties of β-containing γ-TiAl alloys fabricated by electron beam melting, Additive Manufacturing 46 (2021) 102091, https://doi.org/10.1016/j.addma.2021.102091

2020

  1. S. Kobayashi, H. Fukunishi, Reduction of Thermal Expansion of Ferritic/martensitic Heat Resistant Steels -Alloying Effects on Thermal Expansion of α-Fe Phase-, ISIJ International 60(12) (2020) 2983-2989, https://doi.org/10.2355/isijinternational.ISIJINT-2020-205
  2. A. Ariaseta, S. Kobayashi, M. Takeyama, Y. Wang, S. Imano, Characterization of Recrystallization and Second-Phase Particles in Solution-Treated Additively Manufactured Alloy 718, Metallurgical and Materials Transactions A 51 (2020) 973-981, https://doi.org/10.1007/s11661-019-05560-y
  3. S. Kobayashi, T. Otsuka, R. Watanabe, K. Sagitani, M. Okamoto, K. Tokutomi, Alloying Effects on the Competition Between Discontinuous Precipitation Versus Continuous Precipitation of δ/η Phases in Model Ni-Based Superalloys, Superalloys 2020: Proceedings of the 14th International Symposium on Superalloys (2020) 163-170, https://doi.org/10.1007/978-3-030-51834-9_16
  4. R. Nagashima, R. Yamagata, H. Nakashima, M. Takeyama, Phase Equilibria Among A1/TCP/GCP Phases and Microstructure Formation in Ni-Cr-Mo System at Elevated Temperatures, Superalloys 2020: Proceedings of the 14th International Symposium on Superalloys (2020) 131-141, https://doi.org/10.1007/978-3-030-51834-9_16

2019

  1. S. Ida, R. Yamagata, H. Nakashima, S. Kobayashi, M. Takeyama, Phase Equilibria Among γ/TCP/GCP Phases in Nb-Poor Region of Ni-Nb-Co Ternary System at Elevated Temperatures, Journal of Phase Equilibria and Diffusion 40 (2019) 570-582, https://doi.org/10.1007/s11669-019-00744-w
  2. S. Kobayashi, Effects of Si on the formation of intermetallic phases in alloying reaction between iron substrate and liquid Zn containing 0.2 wt% Al, SN Applied Sciences 1 (2019) 61, https://doi.org/10.1007/s11669-019-00744-w