論文

Structural characterization of ion nitrided 316L austenitic stainless steel: Influence of treatment temperature and time

Ozkan Gokcekaya*, Celaletdin Ergun*, Turgut Gulmez, Takayoshi Nakano and Safak Yilmaz,
Structural characterization of ion nitrided 316L austenitic stainless steel: Influence of treatment temperature and time
Metals, 12(2), (2022), 306; 1-11.
DOI : https://doi.org/10.3390/met12020306

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論文

電子ビーム粉末床溶融結合法で作製したγ-TiAl合金の特異バンド状組織に及ぼす投入エネルギー密度の影響

趙研，森田尚秀，松岡弘剛，安田弘行，當代光陽，上田実，竹山雅夫，中野貴由：
電子ビーム粉末床溶融結合法で作製したγ-TiAl合金の特異バンド状組織に及ぼす投入エネルギー密度の影響，
軽金属，72 [5 or 6]，(2022), in press.

論文

粉末床溶融結合法用β型Ti-15Mo-5Zr-3Al合金粉末の評価と流動特性

小笹良輔、Park Sung-Hyun、Gokcekaya Ozkan、Gupta Mridul、山岡祐介、松坂匡晃、森田尚昂、松垣あいら、石本卓也、中野貴由
粉末床溶融結合法用β型Ti-15Mo-5Zr-3Al合金粉末の評価と流動特性
スマートプロセス学会誌, in press.

論文

Anisotropic control of crystallographic texture in metals and ceramics powder-bed-fusion-type additive manufacturing―A review, MICRO-ARCHITECTURED MATERIALS BY ADDITIVE MANUFACTURING

Koji Hagihara, Takayoshi Nakano*:
Anisotropic control of crystallographic texture in metals and ceramics powder-bed-fusion-type additive manufacturing―A review, MICRO-ARCHITECTURED MATERIALS BY ADDITIVE MANUFACTURING
Journal of Metals (JOM), (2021), on line.
https://doi.org/10.1007/s11837-021-04966-7

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Effect of a Helium Gas Atmosphere on the Mechanical Properties of Ti-6Al-4V Alloy built with Laser Powder Bed Fusion: A Comparative Study with Argon Gas

Hiroki Amano, Takuya Ishimoto, Ryoya Suganuma , Keisuke Aiba, Shi-Hai Sun, Ryosuke Ozasa, Takayoshi Nakano*:
Effect of a Helium Gas Atmosphere on the Mechanical Properties of Ti-6Al-4V Alloy built with Laser Powder Bed Fusion: A Comparative Study with Argon Gas,
Additive Manufacturing, 48, (2021), 102444; 1-9.
DOI:https://doi.org/10.1016/j.addma.2021.102444

論文

Influence of powder characteristics on densification via crystallographic texture formation: Pure tungsten prepared by laser powder bed fusion

Ozkan Gokcekaya, Takuya Ishimoto, Tsubasa Todo, Pan Wang, Nakano Takayoshi*:
Influence of powder characteristics on densification via crystallographic texture formation: Pure tungsten prepared by laser powder bed fusion,
Additive Manufacturing Letters, 1, (2021), 100016; 1-8.
https://doi.org/10.1016/j.addlet.2021.100016

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論文

Anisotropic control of crystallographic texture in metals and ceramics powder-bed-fusion-type additive manufacturing

Koji Hagihara, Takayoshi Nakano*:
Anisotropic control of crystallographic texture in metals and ceramics powder-bed-fusion-type additive manufacturing―A review, MICRO-ARCHITECTURED MATERIALS BY ADDITIVE MANUFACTURING
Journal of Metals (JOM), 74, (2021), 1760-1773.
DOI:https://doi.org/10.1007/s11837-021-04966-7

論文

Comparison of microstructure, crystallographic texture, and mechanical properties in Ti–15Mo–5Zr–3Al alloys fabricated via electron and laser beam powder bed fusion technologies

Shi-Hai Sun, Koji Hagihara, Takuya Ishimoto, Ryoya Suganuma, Yun-Fei Xue, Takayoshi Nakano:
Comparison of microstructure, crystallographic texture, and mechanical properties in Ti–15Mo–5Zr–3Al alloys fabricated via electron and laser beam powder bed fusion technologies
Additive Manufacturing, 47, (2021), 102329; 1-17.

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論文

Control of Crystallographic Texture and Mechanical Properties of Hastelloy-X via Laser Powder Bed Fusion

Shinya Hibino*, Tsubasa Todo, Takuya Ishimoto, Ozkan Gokcekaya, Yuichiro Koizumi, Kenichiroh Igashira, Takayoshi Nakano*:
Control of Crystallographic Texture and Mechanical Properties of Hastelloy-X via Laser Powder Bed Fusion,
Crystals, 11(9), (2021), 1064.
DOI:https://doi.org/10.3390/cryst11091064
*: Corresponding author

論文

Fabrication of Ti-Alloy Powder/Solid Composite with Uniaxial Anisotropy by Introducing Unidirectional Honeycomb Structure via Electron Beam Powder Bed Fusion

Naoko Ikeo*, Tatsuya Matsumi, Takuya Ishimoto, Ryosuke Ozasa, Aira Matsugaki, Tadaaki Matsuzaka, Ozkan Gokcekaya, Yorinobu Takigawa, Takayoshi Nakano*:
Fabrication of Ti-Alloy Powder/Solid Composite with Uniaxial Anisotropy by Introducing Unidirectional Honeycomb Structure via Electron Beam Powder Bed Fusion,
Crystals, 11 [9], (2021), 1074;1-11.
https://doi.org/10.3390/cryst11091074

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論文

Single crystalline-like crystallographic texture formation of pure tungsten through laser powder bed fusion

Tsubasa Todo, Takuya Ishimoto, Ozkan Gokcekaya, Jongyeong Oh, Takayoshi Nakano*:
Single crystalline-like crystallographic texture formation of pure tungsten through laser powder bed fusion,
Scripta Materialia, 206, (2022), 114252; 1-6.
https://doi.org/10.1016/j.scriptamat.2021.114252

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論文

Surface residual stress and phase stability in unstable β-type Ti-15Mo-5Zr-3Al alloy manufactured by laser and electron beam powder bed fusion technologies

Aya Takase*, Takuya Ishimoto, Ryoya Suganuma, Takayoshi Nakano*:
Surface residual stress and phase stability in unstable β-type Ti-15Mo-5Zr-3Al alloy manufactured by laser and electron beam powder bed fusion technologies,
Additive Manufacturing, 47, (2021), 102257; 1-14.
https://doi.org/10.1016/j.addma.2021.102257

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論文

Inverse columnar-equiaxed transition in 304 and 316L stainless steels melt by electron-beam for additive manufacturing

Yuichiro Miyata, Masayuki Okugawa*, Yuichiro Koizumi*, Takayoshi Nakano：
Inverse columnar-equiaxed transition in 304 and 316L stainless steels melt by electron-beam for additive manufacturing,
Crystals, 11 (8), (2021), 856: 1-13.
https://doi.org/10.3390/cryst11080856

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論文

Comparison of phase characteristics and residual stresses in Ti-6Al-4V alloy manufactured by laser powder bed fusion (L-PBF) and electron beam powder bed fusion (EB-PBF) techniques.

Aya Takase*, Takuya Ishimoto, Naotaka Morita, Naoko Ikeo, Takayoshi Nakano*
Comparison of phase characteristics and residual stresses in Ti-6Al-4V alloy manufactured by laser powder bed fusion (L-PBF) and electron beam powder bed fusion (EB-PBF) techniques.
Crystals, 11(7), (2021), 796; 1-17.
https://doi.org/10.3390/cryst11070796
*: Corresponding author

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論文

Improving the tensile properties of additively manufactured β-containing TiAl alloys via microstructure control focusing on cellular precipitation reaction

Ken Cho, Hirotaka Odo, Keisuke Okamoto, Hiroyuki Y. Yasuda*, Hirotoyo Nakashima, Masao Takeyama, Takayoshi 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; 1-13.
https://doi.org/10.3390/cryst11070809 (registering DOI)

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論文

Factor which governs the feature of texture developed during additive manufacturing; clarified from the study on hexagonal C40-NbSi2

Koji Hagihara#, Takuya Ishimoto#, Masahiro Suzuki, Ryosuke Ozasa, Aira Matsugaki, Pan Wang, Takayoshi Nakano∗
Factor which governs the feature of texture developed during additive manufacturing; clarified from the study on hexagonal C40-NbSi2,
Scripta Materialia, 203, (2021), 114111; 1-6.
DOI:https://doi.org/10.1016/j.scriptamat.2021.114111
#: The authors equally contributed to this study.
*: Corresponding author

論文

Effect of precursor deficiency induced Ca/P ratio on antibacterial and osteoblast adhesion properties of Ag-incorporated hydroxyapatite: Reducing Ag toxicity

Ozkan Gokcekaya, Celaletdin Ergun*, Thomas J. Webster, Abdurrahman Bahadir, Kyosuke Ueda, Takayuki Narushima, Takayoshi Nakano:
Effect of precursor deficiency induced Ca/P ratio on antibacterial and osteoblast adhesion properties of Ag-incorporated hydroxyapatite: Reducing Ag toxicity,
Materials, 14, (2021), 3158; 1-18.
https://doi.org/10.3390/ma14123158
*: Corresponding author

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論文

Peculiar microstructural evolution and tensile properties of β-containing γ-TiAl alloys fabricated by electron beam melting

Ken Cho, Hajime Kawabata, Tatsuhiro Hayashi, Hiroyuki Y. Yasuda*, Hirotoyo Nakashima, Masao Takeyama, Takayoshi Nakano:
Peculiar microstructural evolution and tensile properties of β-containing γ-TiAl alloys fabricated by electron beam melting,
Additive Manufacturing, 46, (2021), 102091; 1-12.
https://doi.org/10.1016/j.addma.2021.102091

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論文

Crystallographic texture- and grain boundary density-independent improvement of corrosion resistance in austenitic 316L stainless steel fabricated via laser powder bed fusion

Yusuke Tsutumi*, Takuya Ishimoto, Tastuya Oishi, Tomoyo Manaka, Peng Chen, Maki Ashida, Kotaro Doi, Hideki Katayama, Takao Hanawa, Takayoshi Nakano*:
Crystallographic texture- and grain boundary density-independent improvement of corrosion resistance in austenitic 316L stainless steel fabricated via laser powder bed fusion,
Additive manufacturing, (2021), 102066; 1-9.
https://doi.org/10.1016/j.addma.2021.102066
*: Corresponding author

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論文

Direct numerical analyses of nanoscale thermal transport near MgO edge dislocations

Wataru Sekimoto, Susumu Fujii, Masato Yoshiya*:

“Direct numerical analyses of nanoscale thermal transport near MgO edge dislocations”,

Scripta Materialia, 202 (2021) 113991.

DOI: https://doi.org/10.1016/j.scriptamat.2021.113991

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