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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.

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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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Control of crystallographic textures by metal additive manufacturing-A review

Takayoshi Nakano:
Control of crystallographic textures by metal additive manufacturing-A review,
IOP Conf. Ser.: Mater. Sci. Eng., 1310, (2024), 012013: 1-14.
10.1088/1757-899X/1310/1/012013

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Design and development of a novel non-equiatomic Ti-Nb-Mo-Ta-W refractory high entropy alloy with a single-phase body-centered cubic structure

Yong Seong Kim#, Ryosuke Ozasa#, Kazuhisa Sato, Ozkan Gokcekaya, Takayoshi Nakano*:
Design and development of a novel non-equiatomic Ti-Nb-Mo-Ta-W refractory high entropy alloy with a single-phase body-centered cubic structure,
Scripta Materialia, 252, (2024), 116260, 1-7.
#: These authors contributed equally to this work. *: Corresponding author
https://doi.org/10.1016/j.scriptamat.2024.116260

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Local valence analysis of 316L austenitic stainless steel produced by laser powder bed fusion

Kazuhisa Sato, Shunya Takagi, Satoshi Ichikawa, Takuya Ishimoto, Takayoshi Nakano:
Local valence analysis of 316L austenitic stainless steel produced by laser powder bed fusion,
Materials Letters, 372, (2024), 136978, 1-4.
https://doi.org/10.1016/j.matlet.2024.136978

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Effects of hatch spacing on densification, microstructural and mechanical properties of β solidifying γ-TiAl alloy fabricated by laser powder bed fusion

Sung-Hyun Park, Ozkan Gokcekaya, Myung-Hoon Oh, Takayoshi Nakano:
Effects of hatch spacing on densification, microstructural and mechanical properties of β solidifying γ-TiAl alloy fabricated by laser powder bed fusion,
Materials Characterization, 214, (2024), 114077, 1-13.
https://doi.org/10.1016/j.matchar.2024.114077

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Resolving the long-standing discrepancy in Fe3Al ordering mobilities: A synergistic experimental and phase-field study

Yuheng Liu, Madoka Watanabe, Masayuki Okugawa, Takashi Hagiwara, Tsubasa Sato, Yusuke Seguchi, Yoshitaka Adachi, Yoritoshi Minamino, Yuichiro Koizumi：Resolving the long-standing discrepancy in Fe3Al ordering mobilities: A synergistic experimental and phase-field study, Acta Materialia, Vol.273, No.1(2024)119958.

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Effect of Laser Scan Speed on Defects and Texture Development of Pure Chromium Metal Fabricated via Powder Bed Fusion-Laser Beam

Yong Seong Kiｍ, Ozkan Gokcekaya*, Aira Matsugaki, Takayoshi Nakano*:
Effect of Laser Scan Speed on Defects and Texture Development of Pure Chromium Metal Fabricated via Powder Bed Fusion-Laser Beam, Materials, 17, (2024), 2097: 1-13.
https://doi.org/10.3390/ma17092097

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Delineating the ultra-low misorientation between the dislocation cellular structures in additively manufactured 316L stainless steel

Fei Sun*, Yoshitaka Adachi*, Kazuhisa Sato, Takuya Ishimoto, Takayoshi Nakano, Yuichiro Koizumi:
Delineating the ultra-low misorientation between the dislocation cellular structures in additively manufactured 316L stainless steel,
Materials, 17, (2024), 1851; 1-14.
https://doi.org/10.3390/ma17081851

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Solute segregation in a rapidly solidified Hastelloy-X Ni-based superalloy during laser powder bed fusion investigated by phase-field and computational thermal-fluid dynamics simulations

Masayuki Okugawa*, Kenji Saito, Haruki Yoshima, Katsuhiko Sawaizumi, Sukeharu Nomoto, Makoto Watanabe, Takayoshi Nakano, Yuichiro Koizumi*:
Solute segregation in a rapidly solidified Hastelloy-X Ni-based superalloy during laser powder bed fusion investigated by phase-field and computational thermal-fluid dynamics simulations,
Additive Manufacturing, 84, (2024), 104079, 1-13.
https://doi.org/10.1016/j.addma.2024.104079

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Comparison of in-plane compression of additively manufactured Ti6Al4V 2D auxetic structures: Lattice design, manufacturing speed, and failure mode

Zana Eren, Ozkan Gokcekaya, Demet Balkan, Takayoshi Nakano, Zahit Mecitoğlu:
Comparison of in-plane compression of additively manufactured Ti6Al4V 2D auxetic structures: Lattice design, manufacturing speed, and failure mode,
Materials & Design, 241, (2024), 112885, 1-19.
https://doi.org/10.1016/j.matdes.2024.112885

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Peculiar microstructural evolution and hardness variation depending on laser powder bed fusion-manufacturing condition in Ti-6Al-2Sn-4Zr-6Mo

Prince Valentine Cobbinah*, Sae Matsunaga, Yoshiaki Toda, Ryosuke Ozasa, Masayuki Okugawa, Takuya Ishimoto, Yuheng Liu, Yuichiro Koizumi, Pan Wang, Takayoshi Nakano*, Yoko Yamabe-Mitarai*:
Peculiar microstructural evolution and hardness variation depending on laser powder bed fusion-manufacturing condition in Ti-6Al-2Sn-4Zr-6Mo,
Smart Materials in Manufacturing, 2, (2024), 100050, 1-10.
https://doi.org/10.1016/j.smmf.2024.100050

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