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Layered Na₂Ti₃O₇-supported Ru catalyst for ambient CO₂ methanation

Hyo-Jin Kim, Kohsuke Mori*, Satoshi Ichikawa, Takayoshi Nakano, Hiromi Yamashita:
Layered Na₂Ti₃O₇-supported Ru catalyst for ambient CO₂ methanation,
Nature Communications, 16, (2025), 2697; 1-9.
DOI: https://doi.org/10.1038/s41467-025-57954-9

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On the enhanced creep performance in Ti6246 achieved through Laser Powder Bed Fusion (LPBF) processing

Prince Valentine Cobbinah*, Sae Matsunaga, Yoshiaki Toda, Ryosuke Ozasa, Takuya Ishimoto, Takayoshi Nakano, Tsutomu Ito, Yoko Yamabe-Mitarai:*
On the enhanced creep performance in Ti6246 achieved through Laser Powder Bed Fusion (LPBF) processing,
Metallurgical and Materials Transactions A, (2025), in press.
DOI: https://doi.org/10.1007/s11661-025-07759-8

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Raking and Fusing Behaviors during Fabrication of Multiple-layers in Powder Bed Fusion: An integrated discrete Element and computational thermal fluid Dynamics Study

Shuhei Mino, Masayuki Okugawa, Takayoshi Nakano, Yuichiro Koizumi:
Raking and Fusing Behaviors during Fabrication of Multiple-layers in Powder Bed Fusion: An integrated discrete Element and computational thermal fluid Dynamics Study
Journal of the Japan Society of Powder and Powder Metallurgy, 72, (2025), 16P-T6-11; S1465-S1469.
https://doi.org/10.2497/jjspm.16P-T6-11

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In-situ alloying of nonequiatomic TiNbMoTaW refractory bio-high entropy alloy via laser powder bed fusion: Achieving suppressed microsegregation and texture formation

Yong Seong Kim, Ozkan Gokcekaya*, Kazuhisa Sato, Ryosuke Ozasa, Aira Matsugaki, Takayoshi Nakano*:
In-situ alloying of nonequiatomic TiNbMoTaW refractory bio-high entropy alloy via laser powder bed fusion: Achieving suppressed microsegregation and texture formation,
Materials & Design, 252, (2025), 113824; 1-18.
https://doi.org/10.1016/j.matdes.2025.113824

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Phase-separation induced dislocation-network cellular structures in Ti-Zr-Nb-Mo-Ta high-entropy alloy processed by laser powder bed fusion

Han Chen, Daisuke Egusa*, Zehao Li, Taisuke Sasaki, Ryosuke Ozasa , Takuya Ishimoto, Masayuki Okugawa, Yuichiro Koizumi, Takayoshi Nakano, Eiji Abe*
Phase-separation induced dislocation-network cellular structures in Ti-Zr-Nb-Mo-Ta high-entropy alloy processed by laser powder bed fusion,
Additive manufacturing, 102, (2025), 104737; 1-14.
https://doi.org/10.1016/j.addma.2025.104737

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Low Young’s modulus in laser powder bed fusion processed Ti-15Mo-5Zr-3Al alloys achieved by the control of crystallographic texture combined with the retention of low-stability bcc structure

Shota Higashino, Daisuke Miyashita , Takuya Ishimoto, Eisuke Miyoshi, Takayoshi Nakano, Masakazu Tane*:
Low Young’s modulus in laser powder bed fusion processed Ti-15Mo-5Zr-3Al alloys achieved by the control of crystallographic texture combined with the retention of low-stability bcc structure,
Additive Manufacturing, 102 (2025), 104720; 1-13.
https://doi.org/10.1016/j.addma.2025.104720

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Ultra-precision surface treatment of beta-Titanium alloy printed using laser and electron beam melting sources

Jibin Boban*, Afzaal Ahmed, Ozkan Gokcekaya , Takayoshi Nakano:
Ultra-precision surface treatment of beta-Titanium alloy printed using laser and electron beam melting sources,
CIRP Journal of Manufacturing Science and Technology, 58, (2025), 01.006; 1-19.
https://doi.org/10.1016/j.cirpj.2025.01.006

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Superimpositional design of crystallographic textures and macroscopic shapes via metal additive manufacturing–Game-change in component design

Takuya Ishimoto, Naotaka Morita, Ryosuke Ozasa, Aira Matsugaki, Ozkan Gokcekaya, Shota Higashino, Masakazu Tane, Tsuyoshi Mayama, Ken Cho, Hiroyuki Y. Yasuda, Masayuki Okugawa, Yuichiro Koizumi, Masato Yoshiya, Daisuke Egusa, Taisuke Sasaki, Eiji Abe, Hajime Kimizuka, Naoko Ikeo, Takayoshi Nakano*:
Superimpositional design of crystallographic textures and macroscopic shapes via metal additive manufacturing–Game-change in component design, Acta Materialia, (2025), 1-12.
DOI: https://doi.org/10.1016/j.actamat.2025.120709

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Rational design of stainless steel self-catalytic reactors for CO2 methanation: Extending from metal powder to 3D-printed reactor

Hyo-Jin Kim, Kohsuke Mori*, Takayoshi Nakano, Hiromi Yamashita:
Rational design of stainless steel self-catalytic reactors for CO2 methanation: Extending from metal powder to 3D-printed reactor,
Catalysis Science & Technology, (2025), in press.

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The effect of energy density on microstructural, mechanical, and corrosion characteristics of Ti6Al-4V alloy fabricated via selective laser melting (SLM) and electron beam melting (EBM) techniques

H. Yilmazer, Y. A. Sadikoglu, S. Kucuk, O. Gokcekaya, I. C. Turu, T. Nakano, B. Dikici*:
The effect of energy density on microstructural, mechanical, and corrosion characteristics of Ti6Al-4V alloy fabricated via selective laser melting (SLM) and electron beam melting (EBM) techniques,
Journal of Materials Engineering and Performance, (2024), in press.
https://doi.org/10.1007/s11665-024-10512-8

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Effects of heat accumulation strategies on defects and microstructure of pure chromium fabricated by laser powder bed fusion: An experimental and numerical study

Sung-Hyun Park, Ozkan Gokcekaya*, Tatsuya Nitomakida, Takayoshi Nakano*:
Effects of heat accumulation strategies on defects and microstructure of pure chromium fabricated by laser powder bed fusion: An experimental and numerical study,
Journal of Materials Research and Technology, (2024): 1-12.
https://doi.org/10.1016/j.jmrt.2024.11.049

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Quantitative revealing the solute segregation behavior at melt pool boundary in additively manufactured stainless steel using a novel processing method for precise positioning by HAADF-STEM

Fei Sun*, Yoshitaka Adachi, Kazuhisa Sato, Takuya Ishimoto, Takayoshi Nakano, Yuichiro Koizumi:
Quantitative revealing the solute segregation behavior at melt pool boundary in additively manufactured stainless steel using a novel processing method for precise positioning by HAADF-STEM,
Materials Characterization, Materials Characterization, 217, (2024), 114435: 1-6.
https://doi.org/10.1016/j.matchar.2024.114435

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Laser energy-dependent processability of non-equiatomic TiNbMoTaW high-entropy alloy through in-situ alloying of elemental feedstock powders by laser powder bed fusion

Yong Seong Kim, Ozkan Gokcekaya, Aira Matsugaki, Ryosuke Ozasa, Takayoshi Nakano*: Laser energy-dependent processability of non-equiatomic TiNbMoTaW high-entropy alloy through in-situ alloying of elemental feedstock powders by laser powder bed fusion, Materialia, 38, (2024), 102241: 1-10.
https://doi.org/10.1016/j.mtla.2024.102241

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The effect of energy density on microstructural, mechanical, and corrosion characteristics of Ti6Al-4V alloy fabricated via selective laser melting (SLM) and electron beam melting (EBM) techniques

H. Yilmazer, Y. A. Sadikoglu, S. Kucuk, O. Gokcekaya, I. C. Turu, T. Nakano, B. Dikici*:
The effect of energy density on microstructural, mechanical, and corrosion characteristics of Ti6Al-4V alloy fabricated via selective laser melting (SLM) and electron beam melting (EBM) techniques,
Journal of Materials Engineering and Performance, (2024), in press.

論文

Laser additive manufacturing of a carbon-supersaturated β-Ti alloy for biomaterial application

Mingqi Dong, Yu Zhang, Weiwei Zhou*, Peng Chen, Zhenxing Zhou, Hiroyasu Kanetaka, Takuya Ishimoto, Yuichiro Koizumi, Takayoshi Nakano, Naoyuki Nomura*:
Laser additive manufacturing of a carbon-supersaturated β-Ti alloy for biomaterial application,
Additive manufacturing Letters, 11, (2024), 100233: 1-7.
https://doi.org/10.1016/j.addlet.2024.100233

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Novel strengthening mechanism of laser powder bed fusion manufactured Inconel 718: Effects of customized hierarchical interfaces

Tsuyoshi Mayama*, Takuya Ishimoto, Masakazu Tane , Ken Cho, Koki Manabe, Daisuke Miyashita, Shota Higashino, Taichi Kikukawa, Hiroyuki Y. Yasuda, Takayoshi Nakano:
Novel strengthening mechanism of laser powder bed fusion manufactured Inconel 718: Effects of customized hierarchical interfaces,
Additive Manufacturing, (2024), 104412: 1-16.
https://doi.org/10.1016/j.addma.2024.104412

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Creep Behavior of Ti-6Al-4Nb-4Zr Fabricated by Powder Bed Fusion Using a Laser Beam

Yoko Yamabe-Mitarai, Takashi Inoue, Tomoki Kuroda, Sae Matsunaga, Yoshiaki Toda, Tetsuya Matsunaga, Tsutomu Ito, Ryosuke Ozasa, Takuya Ishimoto, Takayoshi Nakano:
Creep Behavior of Ti-6Al-4Nb-4Zr Fabricated by Powder Bed Fusion Using a Laser Beam,
Materials Transactions, (2024), 202406, 163-170.
10.2320/jinstmet.JA202406

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Fabrication and Process Monitoring of 316L Stainless Steel by Laser Powder Bed Fusion with µ-Helix Scanning Strategy and Narrow Scanning Line Intervals

Yuheng Liu, Kazufumi Nose, Masayuki Okugawa, Yuichiro Koizumi, Takayoshi Nakano:
Fabrication and Process Monitoring of 316L Stainless Steel by Laser Powder Bed Fusion with µ-Helix Scanning Strategy and Narrow Scanning Line Intervals,
Materials Transactions, (2024), 202402, 190-197.
10.2320/jinstmet.JA202402

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Effect of scan speed on microstructure and tensile properties of Ti-48Al-2Cr-2Nb alloys fabricated via additive manufacturing, Materials Transactions

Ken Cho, Masahiro Sakata, Hiroyuki Yasuda*, Mitsuharu Todai, Minoru Ueda, Masao Takeyama, Takayoshi Nakano: Effect of scan speed on microstructure and tensile properties of Ti-48Al-2Cr-2Nb alloys fabricated via additive manufacturing, Materials Transactions, (2024), 202405,198-204.
10.2320/jinstmet.JA202405

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Investigating the relationship between laser scan strategy and corrosion performance of laser beam powder bed fusioned Ti6Al4V alloy

Tohid Rajabi, Hamidreza Ghorbani, Masoud Atapour, Ozkan Gokcekaya, Takayoshi Nakano:
Investigating the relationship between laser scan strategy and corrosion performance of laser beam powder bed fusioned Ti6Al4V alloy,
Progress in Additive Manufacturing, (2024), 00765, 1-15.
https://doi.org/10.1007/s40964-024-00765-z

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