Organization
School of Materials and Chemical Technology Assistant Professor
Title
Assistant Professor
External link
NAGASHIMA RYOTA
Papers
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Ni-Cr合金における粒界析出物のバリアント選択とその粒界被覆率への影響
永島涼太, 中田伸生
R054カーボンニュートラル実現のための耐熱材料委員会研究会報告 Vol. 4 ( No. 1 ) 2026.3
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浅野雅之, 藤倉快, 永島涼太, 中田伸生, 奥谷将臣, 佐藤祐也, 大坪浩文
熱処理 Vol. 66 ( No. 1 ) 2026.2
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Role of Mn-Enriched Cementite Formed during Isothermal Treatment in Retaining Reversed Austenite in C–Mn Eutectoid Steels
Kai Fujikura, Ryota Nagashima, Nobuo Nakada, Shohei Yabu
ISIJ International Vol. 65 ( No. 12 ) 2025.11
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Multiscale characterization of Lüders band propagation in ferritic steel using digital image correlation with multiple microscopy techniques
Yusuke Sato, Ryota Nagashima, Nobuo Nakada, Fusae Shiimori, Nobusuke Kariya, Shinjiro Kaneko
Journal of Materials Research and Technology 2025.11
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Continuous Recrystallization of Ferrite Matrix Manifested by Cementite Pinning in Deformed Pearlite
Ryota Nagashima, Tao Yang, Nobuo Nakada, Koji Yamashita, Shigenobu Nanba
ISIJ International Vol. 65 ( No. 12 ) 2025.9
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Phase stability and thermal expansion properties of additive manufactured super invar alloy
Senlin Cai, Ryota Nagashima, Yaw-Wang Chai, Naoki Sakaguchi, Nobuo Nakada
ISIJ International Vol. 65 ( No. 8 ) 2025.8
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蔡 森霖, 永島 涼太, Yaw Wang CHAI, 坂口 直輝, 中田 伸生
Vol. 111 ( No. 9 ) 2025.6
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Fracture mechanics analysis of anisotropic cleavage fracture caused by transformation-induced microscopic internal stresses in lath martensite
Yutaro Abe, Daisuke Fukui, Ryota Nagashima, Nobuo Nakada, Kazuki Shibanuma
MATERIALS CHARACTERIZATION 223 2025.5
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Experimental phase diagram study of the Ni-rich part of the Ni–Cr–Mo ternary system
Ryota Nagashima, Masao Takeyama
Calphad 88 2025.3
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Morphology Dependence on Mechanical Stability of Secondphase Austenite in Martensitic Steels
Takafumi Abe, Kai Fujikura, Ryota Nagashima, Nobuo Nakada, Shouhei Yabu
ISIJ INTERNATIONAL 64 ( 2 ) 421 - 429 2024
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Microstructural Characterization of Martensite Formed in Highcarbon Steel Based on Rodrigues-Frank Space
Kazuki Tamura, Masahide Natori, Ryota Nagashima, Nobuo Nakada
ISIJ INTERNATIONAL 64 ( 2 ) 218 - 225 2024
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Evaluation of Elastic-Plastic Deformation Behavior of Lath Martensite by Nanoindentation Technique
Mizuho Shiki, Ryota Nagashima, Nobuo Nakada
ISIJ INTERNATIONAL 64 ( 2 ) 482 - 485 2024
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Comparison between the Lüders and Portevin-Le Chatelier Bands in the Low-strain-rate Tensile Testing of Ultralow-carbon Ferritic Steel
Eibun Kyo, Seung-Yong Lee, Ryota Nagashima, Nobuo Nakada, Fusae Shiimori, Nobusuke Kariya, Shinjiro Kaneko
ISIJ INTERNATIONAL 64 ( 7 ) 2024
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鉄鋼材料の相変態に起因した微視的内部応力と力学特性の関係
福井大介, 川人悠生, 安部祐太郎, 永島涼太, 中田伸生
材料 Vol. 72 ( No. 9 ) 2023.9
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固溶強化型Ni-Cr-W系合金のクリープに及ぼすα-W (bcc) 相の影響
若林英輝, 野津直人, 阿波和希, 永島涼太, 中島広豊, 竹山雅夫
日本学術振興会第123委員会研究報告 Vol. 64 ( No. 1 ) 2023.3
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Ni-Cr-Mo三元系におけるNiCrMo-P (TCP) 相およびNi2(Cr, Mo) (GCP) 相を利用した組織制御
永島涼太, 中島広豊, 竹山雅夫
日本学術振興会第123委員会研究報告 Vol. 63 ( No. 1 ) 2022.3
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Ni-Cr-Mo系における γ/TCP/Ni2Cr (oP6) 三相間の相平衡と組織設計指導原理に関する研究
永島涼太
2022.3
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Experimental and calculation approach for phase equilibria among γ/TCP/GCP oP6 phases at elevated temperatures
Ryota Nagashima, Hirotoyo Nakashima, Masao Takeyama
MRS ADVANCES 6 ( 6 ) 187 - 194 2021.5
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Effect of Cu on oxidation behaviour of FCC Fe-Ni-Cr-Al and Ni-Cr-Al based alloys
Shigenari Hayashi, Daiki Kudo, Ryota Nagashima, Haruki Utsumi
Corrosion Science vol. 163 2020.1
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Phase Equilibria Among A1/TCP/GCP Phases and Microstructure Formation in Ni-Cr-Mo System at Elevated Temperatures
Ryota Nagashima, Ryosuke Yamagata, Hirotoyo Nakashima, Masao Takeyama
SUPERALLOYS 2020 131 - 141 2020
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Ni-Cr-Mo 3元系におけるA1 / TCP / GCP Ni2(Cr,Mo)相の相平衡
永島 涼太, 山形 遼介, 中島 広豊, 小林 覚, 竹山 雅夫
日本学術振興会耐熱金属材料第123委員会研究報告 Vol. 60 ( No. 1 ) 2019.3
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NOVEL MICROSTRUCTURE DESIGN APPROACH USING TCP AND GCP IN NI-CR-M TERNARY SYSTEMS BASED ON PHASE DIAGRAM STUDY AT ELEVATED TEMPERATURE
Ryota Nagashima, Ryosuke Yamagata, Hirotoyo Nakashima, Satoru Kobayashi, Masao Takeyama
JOINT EPRI - 123HIMAT INTERNATIONAL CONFERENCE ON ADVANCES IN HIGH-TEMPERATURE MATERIALS, 2019 1436 - 1445 2019
Research Projects
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Effect of grain boundary characters on local deformation behavior near grain boundaries by nanoindentation method
Grant number：24K17492 2024.4 - 2029.3
Japan Society for the Promotion of Science Grants-in-Aid for Scientific Research Grant-in-Aid for Early-Career Scientists
Grant amount：\4810000 （ Direct Cost: \3700000 、 Indirect Cost：\1110000 ）
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Investigating the role of grain boundaries in local deformation using the polycrystalline with columnar grains
Grant number：23K19178 2023.8 - 2025.3
Japan Society for the Promotion of Science Grants-in-Aid for Scientific Research Grant-in-Aid for Research Activity Start-up
Grant amount：\2860000 （ Direct Cost: \2200000 、 Indirect Cost：\660000 ）