研究者詳細 - 徳永　辰也

論文 - 徳永　辰也

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Microstructure and Phase Transformation in Fe20Co20Ni20Cr20B20-xSix Alloys Prepared by Mechanical Alloying 査読有り国際誌

Yicheng Zhang, Manabu Ishimaru, Tatsuya Tokunaga, Hidenori Era

Materials Transactions ( Japan Institute of Metals and Materials ) 64 ( 11 ) 2568 - 2574 2023年11月

Structure and Magnetic Properties of Mn-Pt and Mn-Pt-B Melt-Spun Ribbons 査読有り国際誌

Mayu Mitsue, Iwao Sasaki, Yicheng Zhang, Tatsuya Tokunaga, Toshifumi Ogawa

2023 IEEE International Magnetic Conference - Short Papers, INTERMAG Short Papers 2023 - Proceedings ( Institute of Electrical and Electronics Engineers Inc. ) 2023年05月

急冷凝固したFeCoNiCrBSi合金におけるミクロ組織とガラス形成査読有り

張亦成,　徳永辰也

材料 72 ( 3 ) 231 - 233 2023年03月

α鉄におけるホウ素，炭素の粒界偏析に及ぼす合金元素の影響査読有り

徳永辰也 , 元村優太, 恵良秀則, 土山聡宏, 菖蒲一久, 長谷部光弘, 大谷博司

鉄と鋼 109 ( 3 ) 158 - 166 2023年03月

Microstructure control and its observation of rapid solidification Cu–La alloy for the development of fluoride-ion batteries 査読有り国際誌

S. Zhu, H. Akamine, Y. Nagahata, T. Tojigamori, H. Miki, Y. Zhang, T. Tokunaga, S. Iikubo

Journal of Alloys and Compounds 930 167447 2023年01月

Thermodynamic calculation of phase equilibria in the Al-Fe-Zn-O system 査読有り国際誌

Matsumoto N., Tokunaga T.

High Temperature Materials and Processes 41 ( 1 ) 605 - 620 2022年12月

担当区分：責任著者記述言語：英語掲載種別：研究論文（学術雑誌）

The thermodynamics of the phase equilibria in the Al-Fe-Zn-O quaternary system was studied using the calculation of phase diagrams method to understand the oxidation behavior of the Zn bath surface during galvanizing process. The thermodynamic parameters for the Gibbs energies of the different constituent phases in the binary and ternary systems relevant to this quaternary system were taken mainly from previous studies. In this study, the thermodynamic assessment of the Al2O3-ZnO system was carried out based on the available experimental data, and some modifications to the thermodynamic model and/or parameters for the Fe-Zn-O ternary system were made to maintain consistency with the thermodynamic descriptions of other binary and ternary systems, making up the Al-Fe-Zn-O quaternary system adopted in this study. The calculated results on the ternary and quaternary systems generally agreed with the available experimental results on phase equilibria. The set of thermodynamic parameters enabled us to calculate the phase equilibria in the Al-Fe-Zn-O quaternary system over the entire composition and temperature ranges.

DOI： 10.1515/htmp-2022-0249

Scopus

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Investigation of Nanoscale Phase Formation in Rapidly Solidified Fe20Co20Ni20Cr20B201xSix Alloys 査読有り国際誌

Zhang Yicheng, Inoue Koji, Ishimaru Manabu, Tokunaga Tatsuya, Era Hidenori

MATERIALS TRANSACTIONS ( 公益社団法人日本金属学会 ) 63 ( 9 ) 1211 - 1216 2022年09月

担当区分：責任著者記述言語：英語掲載種別：研究論文（学術雑誌）

In this study, nanoscale phase formation in rapidly solidified Fe20Co20Ni20Cr20B20−xSix alloys was investigated using atom probe tomography (APT) and transmission electron microscopy (TEM). According to previous X-ray diffraction measurements and scanning electron microscopy with energy-dispersive X-ray spectroscopy results, it was thought that this alloy system was composed of almost a single face-centered cubic (FCC) solid solution phase when the Si content was 5 at.%. However, APT and TEM results at the nanoscale showed that both an FCC solid solution and compound phases formed for all alloy compositions. The rapidly solidified alloy ribbon with a Si content of 5 at.% showed the presence of nanoscale FCC and Cr2B phases. Furthermore, in addition to the nanoscale FCC and Cr2B phases, a nanoscale Cr3Ni5Si2 phase was observed when the Si content exceeded 7.5 at.%.

DOI： 10.2320/matertrans.mt-m2022058

CiNii Research

鋼中における溶質元素の粒界偏析の熱力学的評価招待有り

徳永辰也

フジコー技報 ( 株式会社フジコー ) 29 6 - 10 2021年12月

Fe20Co20Ni20Cr20B20-xSixハイエントロピー合金の形成相に及ぼす冷却速度の影響と加熱による相変態挙動査読有り

張亦成, 徳永辰也, 恵良秀則, 菖蒲一久, 長谷部光弘

鋳造工学 ( 日本鋳造工学会 ) 93 ( 9 ) 532 - 540 2021年09月

α鉄中における窒素の粒界偏析に及ぼす合金元素の影響査読有り

元村優太, 徳永辰也, 恵良秀則, 菖蒲一久, 長谷部光弘, 大谷博司

熱処理 ( 日本熱処理技術協会 ) 61 ( 3 ) 119 - 125 2021年06月

溶湯浸透法によって作製したSiC二段反応焼結体の摩耗特性査読有り

花田喜嗣, 肖陽, 徳永辰也, 恵良秀則

鋳造工学 92 ( 9 ) 469 - 476 2020年09月

Rapid fabrication of the continuous AlFeCrCoNi high entropy alloy coating on aluminum alloy by resistance seam welding 査読有り

Zhao D., Yamaguchi T., Shu J., Tokunaga T., Danjo T.

Applied Surface Science 517 2020年07月

記述言語：英語掲載種別：研究論文（学術雑誌）

The continuous AlFeCrCoNi high entropy alloy coating was firstly fabricated on aluminium alloy by resistance seam welding. During welding, the coating was formed rapidly under the effect of instantaneous joule heating and the pressure. The gradient temperature transformed the nanocrystalline AlFeCrCoNi powder into the AlFeCrCoNi HEA coating consisted of body-centered-cubic and face-centered cubic structures. According to the calculation and experimental results, the welding process was not brought the negative affect to the substrate and only a certain amount of aluminum element penetrated into the coating. The average thickness and hardness of the coating were 420 µm and 715HV , respectively. Compared to A6061, the coating exhibited excellent wear-resistance in dry, deionized water and 3.5 wt% NaCl solution conditions. The environment played an important role in the wear behaviour of the AlFeCrCoNi HEA coating. Meanwhile, the corrosive wear of the AlFeCrCoNi HEA coating was proved to be beneficial to reduce the wear rate. 0.2

DOI： 10.1016/j.apsusc.2020.145980

Scopus

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溶湯浸透法によるSiC反応焼結体の機械的性質と電気抵抗率に及ぼすFe-Si 合金組成の影響査読有り

花田喜嗣, 肖陽, 山本厚生, 徳永辰也, 恵良秀則

鋳造工学 ( 公益社団法人日本鋳造工学会 ) 92 ( 1 ) 8 - 15 2020年01月

記述言語：日本語掲載種別：研究論文（学術雑誌）

The authors have been investigating a fabrication method to obtain high performance SiC ceramics by two-step reaction sintering using a Fe-Si alloy that is well known as an inoculation agent. In this study, compositions of C as a constituent of first-sintered body and the Fe-Si alloy as a constituent of molten infiltration alloy for the second sintering were changed for SiC ceramics fabrication. The second-sintered body was fabricated by infiltrating the Fe-Si molten alloy into the porous first-sintered body at 1723 K for 6 h under a pressure lower than 10-2 Pa. The C content for the first sintered body was changed from 0 to 28 mass%, whereas the Fe concentration of the alloy for infiltration was changed from 0 to 66 mass%. Microstructure observation, elemental distribution measurements of Fe and Si, and phase identification for obtained second-sintered specimens were conducted using a laser microscope, EPMA, and XRD, respectively. Hardness and fracture toughness were evaluated by results of micro Vickers hardness testing. The electrical resistivity was measured using the four-terminal method. The microstructure of sintered SiC changed with the Fe content of the infiltration alloy, whereas the generated amount of SiC changed only slightly irrespective of the Fe content. No Fe carbide formation was observed, but FeSi2 and FeSi phases were formed at high Fe contents. The fracture toughness of sintered bodies improved to 5.9 MPa·m0.5 at maximum by the increase in the C content of the first sintered body and the Fe content of the infiltration alloy, although the electrical resistivity was reduced to 1.5 × 10-5 Ωm at the minimum by the increase in Fe contents. Consequently, the fracture toughness of the Fe-Si alloy infiltrated SiC improved by two times compared to the conventionally sintered SiC ceramics. Furthermore, the electrical resistivity of the SiC sample largely decreased by one digit or more. It is considered that the superior characteristics are brought about by the extensive formation of finely distributed FeSi2 and FeSi phases.

DOI： 10.11279/jfes.92.8

CiNii Article

その他リンク： https://ci.nii.ac.jp/naid/130007793406

Silicon Carbide Fabrication by Infiltration of Molten Fe-Si Alloy Through Two-Step Reaction Sintering 査読有り国際誌

Yoshitsugu Hanada, Yang Xiao, Akio Sonoda, Hyo-Gyoung Kang,Hideaki Nagayoshi, Atsuo Yamamoto, Tatsuya Tokunaga

Archives of Metallurgy and Materials 64 ( 4 ) 1645 - 1652 2019年12月

Fe-75%Si 合金を用いた溶湯浸透法によるSiC反応焼結体の作製とその機械的性質査読有り

花田喜嗣, 肖陽, 山本厚生, 徳永辰也, 恵良秀則

鋳造工学 ( 公益社団法人日本鋳造工学会 ) 91 ( 10 ) 710 - 716 2019年10月

記述言語：日本語掲載種別：研究論文（学術雑誌）

Structure and mechanical properties of SiC fabricated by the reaction sintering method have been investigated by varying the blending composition of Si, C and SiC powders. First, specimens of the first-sintered body were formed at 473 K under a pressure of 20 MPa in a metallic mold and then sintered by heating at 973 K for 3.6 ks in Ar gas atmosphere. The first-sintered specimens were next put into a graphite mold to set Fe-75mass%Si alloy, which is often used as an inoculation agent, on the specimens and then held at 1693 K for 900 s in a vacuum furnace under a pressure of 10-1 Pa. Finally, SiC was successfully performed as a second-sintered body through the infiltration of Fe-75%Si alloy melt into the porous first-sintered body, which was followed by their mutual reaction. The microstructure and distributions of Fe and Si elements were observed using laser microscope and EPMA respectively. The hardness and fracture toughness were measured using a micro-Vickers hardness tester. The results indicate good infiltration of Fe-75%Si alloy melt into the first sintered body and that the second sintered body had a small amount of porosity. Iron carbides could not be found in the sintered structure but finely distributed iron silicides of FeSi and FeSi2 were found. Furthermore, the fracture toughness of the body increased with increasing C content in the first sintered body. The mechanical properties were improved more than that of conventional sintered SiC when Fe-Si alloy was employed. The improvement in the properties is thought to be due to the uniform and fine distribution of FeSi, FeSi2 and SiC in the matrix.

DOI： 10.11279/jfes.91.710

CiNii Article

その他リンク： https://ci.nii.ac.jp/naid/130007740200

Effect of Nickel Content on Microstructural Evolution in Austempered Solution-Strengthened Ferritic Ductile Cast Iron 査読有り国際誌

Tokunaga T., Kim Y., Era H.

Journal of Materials Engineering and Performance 28 ( 7 ) 4034 - 4040 2019年07月

担当区分：筆頭著者記述言語：英語掲載種別：研究論文（学術雑誌）

© 2019, ASM International. The effects of Ni content and austempering temperature on microstructural evolution during austempering in solution-strengthened ferritic ductile cast iron with Ni contents between 0 and 1.1 mass% were investigated. The microstructure observation for the samples austempered at temperatures between 375 and 325 °C using an infrared gold image furnace was carried out with optical microscopy, x-ray diffraction measurements, and electron back-scattered diffraction pattern (EBSP) analysis. In addition, the Vickers hardness of both the austempered and as-quenched samples was measured under a load of 0.9807 N. According to the microstructure observations, the matrix of the samples austempered at temperatures between 375 and 325 °C exhibited finer acicular ferrite microstructure with increasing Ni content. Optical microscopy and EBSP analysis revealed that the amount of high-carbon austenite phase for the austempered samples increased with increasing Ni content and austempering temperature. Although samples with higher Ni content were found to contain more high-carbon austenite phase in the matrix, the Vickers hardness of the samples tended to increase with increasing Ni content at the same austempering temperature. The reason for this may be the higher carbon content in the matrix of the samples with higher Ni contents.

DOI： 10.1007/s11665-019-04184-y

Scopus

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Fabrication method of silicon carbide by infiltration of molten Fe-Si alloy through two-step reaction sintering 査読有り

Hanada Y., Xiao Y., Sonoda A., Kang H.G., Nagayoshi H., Tokunaga T., Era H.

73rd World Foundry Congress &quot;Creative Foundry&quot;, WFC 2018 - Proceedings 161 - 162 2018年09月

Effect of nickle content on microstructural evolution in austempered solution strengthened ferritic ductile cast iron 査読有り

Tokunaga T., Kim Y., Era H.

73rd World Foundry Congress &quot;Creative Foundry&quot;, WFC 2018 - Proceedings 191 - 192 2018年09月

記述言語：英語掲載種別：研究論文（国際会議プロシーディングス）

The effects of Ni content and austempering temperature on the microstructural evolution during austempering in SSFDI with different Ni contents were investigated. The results obtained are summarized as follows: (1) The bainitic ferrite microstructure for SSFDI was found to be much coarser with increasing Ni content. (2) The amounts of retained austenite for the samples after austempering increased with increasing Ni content and austempering temperature. (3) The Vickers hardness of the matrix for each sample decreased with the increase in austempering temperature, in contrast, increased with increasing Ni content.

Scopus

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状態図計算と金属溶射プロセスへの応用招待有り査読有り

徳永辰也，曽珍素，恵良秀則

溶射 55 ( 2 ) 80 - 84 2018年04月

Effect of cooling rate after fusing on the microstructural evolution and hardness of a Co-based self-fluxing alloy

Tatsuya Tokunaga, Kazuki Yoshida, Hidenori Era

Proceedings of the 8th Asian Thermal Spray Conference and Exhibition 2 pages 2017年11月

担当区分：責任著者記述言語：英語掲載種別：研究論文（国際会議プロシーディングス）

Co基辞溶合金の組織形成と硬さに及ぼす再溶融処理後の冷却速度の影響について調べた結果，本研究で調べた範囲内での冷却速度においては構成相は同じであることが分かった．ただし，構成相のミクロ組織形態は冷却速度により変化し，冷却速度が速いほど硬さの上昇に寄与する相の生成量が増加することが明らかになった．

Evaluation of residual stress in thermal-sprayed Ni-base self-fluxing alloy and alumina coatings

Ikki Kambayashi, Zhensu Zeng, Nobuaki Sakoda, Tatsuya Tokunaga, Hidenori Era

Proceedings of the 8th Asian Thermal Spray Conference and Exhibition 2 pages 2017年11月

記述言語：英語掲載種別：研究論文（国際会議プロシーディングス）

Ni基自溶合金溶射皮膜およびアルミナ溶射皮膜中における残留応力をX線回折法により評価した．いずれの皮膜においても溶射ままの状態では残留応力は引張方向であった．一方で，溶射後に再溶融処理を施したNi基自溶合金暇苦衷の応力は引張から圧縮に変化することが明らかになった．

State of the art HSS work roll for later stands (F4-F7) in hot strip mill finishing trains 査読有り

Oda N., Nozaki Y., Oohata T., Fleiner P., Tokunaga T., Era H.

AISTech - Iron and Steel Technology Conference Proceedings 3 2657 - 2665 2017年05月

高周波誘導加熱による球状黒鉛鋳鉄の表面焼入れ性の評価招待有り査読有り

徳永辰也，若菜凌，濱口主税，浦濱大地，岩川風，福永修大，丸山栄三郎，大坪文隆，惠良秀則

溶射 54 ( 1 ) 8 - 11 2017年01月

担当区分：責任著者記述言語：日本語掲載種別：研究論文（学術雑誌）

様々な条件で高周波焼入れを施した球状黒鉛鋳鉄の組織観察および硬さ試験を行った結果，試験片表面温度が920℃以上になる場合にマルテンサイト組織が形成することが明らかになった．さらに，熱伝導シミュレーション結果から得られた試験片内部の温度分布の形状および深さは，形成された組織領域の分布と概ね対応していることが分かった．これから，本シミュレーションにより，鋳鉄の高周波焼入れ処理で形成される組織や硬さをある程度予測できることが示唆された．

Evaluation of anti-sticking effect of microstructure components in cast iron by friction thermal shock test 査読有り

Oda N., Nozaki Y., Yamamoto H., Tokunaga T., Era H.

72nd World Foundry Congress, WFC 2016 54 - 55 2016年05月

記述言語：英語掲載種別：研究論文（国際会議プロシーディングス）

Anti-sticking resistance is an important property to avoid deep cracks for hot strip mill work roll materials, especially in the later stands where mill incidents like cobble are likely to occur. Effect of microstructure components on anti-sticking property was investigated with cast steel and iron samples using friction thermal shock test. Graphite was found to show higher effect than carbides, although they also show preferable effect, depending on its carbide type.

Scopus

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Effect of Si content on the ferrite-to-austenite transformation during austenitizing in spheroidal graphite cast iron 査読有り

Tokunaga T., Furukawa T., Oda N., Era H.

72nd World Foundry Congress, WFC 2016 36 - 37 2016年05月

記述言語：英語掲載種別：研究論文（国際会議プロシーディングス）

The effect of Si content on the ferrite-to-austenite transformation during austenitization in spheroidal graphite cast iron with a ferrite matrix was investigated. In this study, ferritic ductile cast irons with two different Si contents, 2.3 mass%Si (JIS-FCD400) and 3.8 mass%Si (SSFDI), were used. Microstructural observation revealed that the rate of the ferrite-to-austenite transformation for SSFDI was slower than for FCD400. In addition to the experiments, a simulation of the austenitization was performed for FCD and SSFDI using the DICTRA software package employing kinetic and thermodynamic databases. The simulations reproduced the experimental results on the austenitization behavior for both FCD and SSFDI well.

Scopus

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Deformation Behavior of Corrosion-Resistant Fe-Cr Alloy 査読有り

H.Era, Y.Kono, R.Sasabuchi, N.Miyoshi, T.Tokunaga, N.Shinozaki, J-H.Lee, T.Shimozaki

Applied Microscopy 46 45 - 50 2016年03月

記述言語：英語掲載種別：研究論文（学術雑誌）

高純度FeおよびCr粉末を出発原料とし，レーザー溶融により作製したFe-50mass%Cr合金の耐食性および機械的特性を評価した．その結果，従来の延性に乏しいFe-Cr合金に比べて，高純度Fe-50mass%Cr合金は，非常に高い延性を示すこと，および従来合金よりも高い耐食性を示すことをはじめて明らかにした．

Small Punch Creep Property of High Cr Ferritic Steels 査読有り

S.Komazaki, T.Tokunaga, Y.Kawaji

Proceedings of the 3rd International Conference SSST, Small Sample Test Techniques 6 pages 2014年09月

記述言語：英語掲載種別：研究論文（国際会議プロシーディングス）

Gr.91鋼のスモールパンチクリープ試験を行った結果，定常クリープ速度はMonkman-Grant則のような破断時間との良い相関があることが分かった．これより，定常クリープ域に至る時間までの試験を行えば，スモールパンチクリープ寿命を予測できることが示された．

Thermodynamic Analysis of Phase Equilibria in the Mg-Al-Ho Ternary System 査読有り

T.Tokunaga, H.Kominato, S.Iikubo, H.Ohtani

Materials Transactions 54 ( 5 ) 647 - 655 2013年05月

Evaluation of Sensitization and Self-Healing in Austenitic Stainless Steels Based on Simulations of Cr-Depleted Zones 査読有り

T.Tokunaga, H.Ohtani, J.Ågren

ISIJ International 51 965 - 968 2011年06月

Phase Transformation Behavior of Boron Containing 9% Cr Heat Resistant Steels 査読有り

T. Tokunaga,H. Kaku,H. Miyazaki,F. Masuyama

Materials Science Forum 638-642 2345 - 2350 2010年04月

Phase Transformation Behaviour of Creep-Strength Enhanced 9% Cr Steels 査読有り

T.Tokunaga, F. Masuyama

Materials at High Temperatures 27 ( 1 ) 61 - 65 2010年03月

Thermodynamic Analysis of Phase Equilibria in the Fe-Nb-P Ternary System 査読有り

T. Tokunaga,N. Hanaya,H. Ohtani,M. Hasebe

ISIJ International 49 ( 7 ) 947 - 956 2009年07月

Phase Transformation Behaviour of Grade 91 Ferritic Steel 査読有り

T. Tokunaga,K. Hasegawa,F. Masuyama

Materials Science and Engineering A 510-511 158 - 161 2009年04月

Comprehensive Approach to Creep Life Assessment of Martensitic Heat Resistant Steels 査読有り

F. Masuyama,T. Tokunaga,N. Shimohata,T. Yamamoto,M. Hirano

OHMI, Operation Maintenance and Materials Issues (Internet Journal) 6 2009年04月

Thermodynamic Analysis of the Phase Equilibria in the Fe-Zr-B System 査読有り

T.Tokunaga，K.Terashima，H.Ohtani，M.Hasebe

Materials Transactions 49 ( 11 ) 2534 - 2540 2008年11月

CALPHAD法援用による合金のアモルファス形成能評価査読有り

徳永辰也，大谷博司，長谷部光弘

熱測定 35 ( 4 ) 200 - 208 2008年08月

Thermodynamic Analysis of the Fe-Mn-P Ternary Phase Diagram by Combining the First-Principles and CALPHAD Methods 査読有り

T. Tokunaga,N. Hanaya,H. Ohtani,M. Hasebe

Materials Science Forum 561-565 1899 - 1902 2007年10月

Thermodynamic Analysis of the Phase Equilibria in the Nb-Ni-Zr System 査読有り

T. Tokunaga,S. Matsumoto,H. Ohtani,M. Hasebe

Materials Transactions 48 ( 9 ) 2263 - 2271 2007年09月

Evaluation of the Glass-Forming Ability of Nb-Ni-Ti-Zr Quaternary Alloys Using the CALPHAD Approach 査読有り

T. Tokunaga,H. Ohtani,M. Hasebe

Materials Transactions 48 ( 7 ) 1635 - 1638 2007年07月

Thermodynamic Calculation of Phase Equilibria in the Nb-Ni-Ti-Zr Quaternary System 査読有り

T. Tokunaga,S. Matsumoto,H. Ohtani,M. Hasebe

Materials Transactions 48 ( 2 ) 89 - 96 2007年02月

Be-Mo2元系状態図の熱力学的解析査読有り

中島一喜,徳永辰也,大谷博司,長谷部光弘

日本金属学会誌 71 ( 2 ) 187 - 189 2007年02月

Thermodynamic Assessment of the Al-Cr System by Combining the First-Principles and CALPHAD Methods 査読有り

T. Tokunaga,H. Ohtani,M. Hasebe

Materials Science Forum 539-543 2007年01月

Thermodynamic analysis of the Fe-Cr-P ternary system by incorporating first-principles calculations into the CALPHAD approach

T.Tokunaga,N.Hanaya,H.Ohtani,M.Hasebe

Proceedings of the 13th National Symposium on Phase Diagrams, China-Japan Joint Symposium on Phase Diagrams, Materials Design and Their Applications 26 - 33 2006年11月

Nb-Ni-Zr系における相平衡の熱力学的解析査読有り

徳永辰也,松本智史,大谷博司,長谷部光弘

日本金属学会誌 70 ( 9 ) 741 - 749 2006年09月

Thermodynamic Analysis of the Zr-Be System Using Thermochemical Properties Based on Ab Initio Calculations 査読有り

T. Tokunaga,H. Ohtani,M. Hasebe

Computer Coupling of Phase Diagrams and Thermochemistry 30 ( 2 ) 201 - 208 2006年06月

Be-Ti-V3元系における相平衡の熱力学的計算査読有り

西村雅俊,徳永辰也,大谷博司,長谷部光弘

日本金属学会誌 70 ( 2 ) 122 - 125 2006年02月

Thermodynamic Evaluation of the Phase Equilibria and Glass-Forming Ability of the Ti-Be System 査読有り

T. Tokunaga,H. Ohtani,M. Hasebe

Journal of Phase Equilibria and Diffusion 27 ( 1 ) 83 - 91 2006年02月

Evaluation of the Glass-Forming Ability of Zr-Ti-Be Ternary Alloys Using the CALPHAD Approach 査読有り

T. Tokunaga,H. Ohtani,M. Hasebe

Materials Transactions 46 ( 12 ) 2931 - 2939 2005年12月

Thermodynamic Analysis of the Phase Equilibria of the Nb-Ni-Ti System 査読有り

S. Matsumoto,T. Tokunaga,H. Ohtani,M. Hasebe

Materials Transactions 46 ( 12 ) 2920 - 2930 2005年12月

Thermodynamic Study of Phase Equilibria in the Ni-Fe-B System 査読有り

T. Tokunaga,H. Ohtani,M. Hasebe

Materials Transactions 46 ( 6 ) 1193 - 1198 2005年06月

CALPHAD法を援用したNi-Si-B3元合金のアモルファス形成能の評価査読有り

徳永辰也,大谷博司,長谷部光弘

日本金属学会誌 68 ( 12 ) 1002 - 1007 2004年12月

鉄系クラッド材の界面における拡散挙動査読有り

大道雅幸,里昌英,徳永辰也,大谷博司,長谷部光弘

日本金属学会誌 68 ( 12 ) 1013 - 1019 2004年12月

Thermodynamic Evaluation of the Phase Equilibria and Glass-Forming Ability of the Fe-Si-B System 査読有り

T. Tokunaga,H. Ohtani,M. Hasebe

Computer Coupling of Phase Diagrams and Thermochemistry 28 ( 4 ) 354 - 362 2004年12月

Thermodynamic Analysis of the Ni-Si-Ti System Using Thermochemical Properties Determined from Ab Initio Calculations 査読有り

T. Tokunaga,K. Hashima,H. OHtani,M. Hasebe

Materials Transactions 45 ( 5 ) 1507 - 1514 2004年05月

シーム溶接によるチタン板と軟鋼板との重ね溶接査読有り

西尾一政,加藤光昭,山口富子,徳永辰也,松本敦夫

溶接学会論文集 21 ( 4 ) 553 - 559 2003年11月

Phase Equilibria in the Ni-Si-B System 査読有り

T. Tokunaga,K. Nishio,H. Ohtani,M. Hasebe

Materials Transactions 44 ( 9 ) 1651 - 1654 2003年09月

Thermodynamic Assessment of the Ni-Si System by Incorporating Ab Initio Energetic Calculations into the CALPHAD Approach 査読有り

T. Tokunaga,K. Nishio,H. Ohtani,M. Hasebe

Computer Coupling of Phase Diagrams and Thermochemistry 27 ( 2 ) 161 - 168 2003年06月

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論文 - 徳永　辰也