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柳樂 知也
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305-0047 茨城県つくば市千現1-2-1 [アクセス]

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論文 TSV

2021
  1. Zexi Wu, Tomoya Nagira, Kohsaku Ushioda, Goro Miyamoto, Hidetoshi Fujii. Microstructures and tensile properties of friction stir welded 0.2%C–Si–Mn steel. Materials Science and Engineering: A. 799 (2021) 140068 10.1016/j.msea.2020.140068
2020
  1. 柳樂 知也. Al-Cu合金における凝固組織に及ぼす音響流の影響. 超音波TECHNO. (2020) 40-44
  2. Takumi Kawakubo, Tomoya Nagira, Kohsaku Ushioda, Hidetoshi Fujii. Friction Stir Welding of High Phosphorus Weathering Steel– Weldabilities, Microstructural Evolution and Mechanical Properties. Tetsu-to-Hagane. 106 [12] (2020) 892-901 10.2355/tetsutohagane.tetsu-2020-057
  3. T. Nagira, X.C. Liu, K. Ushioda, H. Fujii. Mechanism of grain structure development for pure Cu and Cu-30Zn with low stacking fault energy during FSW. Science and Technology of Welding and Joining. 25 [8] (2020) 669-678 10.1080/13621718.2020.1818032
  4. T. Nagira, D. Yamashita, M. Kamai, H. Liu, Y. Aoki, H. Fujii, K. Uesugi, A. Takeuchi. Time-resolved X-ray imaging of solidification cracking for Al-Cu alloy at the weld crater. Materials Characterization. 167 (2020) 110469 10.1016/j.matchar.2020.110469
  5. Xiaochao Liu, Yufeng Sun, Tomoya Nagira, Kohsaku Ushioda, Hidetoshi Fujii. Effect of Stacking Fault Energy on the Grain Structure Evolution of FCC Metals During Friction Stir Welding. Acta Metallurgica Sinica (English Letters). 33 [7] (2020) 1001-1012 10.1007/s40195-020-01064-6
  6. T. Nagira, X. C. Liu, K. Ushioda, H. Fujii. Influences of temperature and Sn-addition on microstructural evolution of Ag during FSW. Science and Technology of Welding and Joining. 25 [3] (2020) 198-207 10.1080/13621718.2019.1665859
2019
  1. Tomohiro Nishimura, Ryota Matsubayashi, Kohei Morishita, Masato Yoshiya, Tomoya Nagira, Hideyuki Yasuda. Selection of the Massive-like <i>δ</i>-<i>γ</i> Transformation due to Nucleation of Metastable <i>δ</i> Phase in Fe-18 Mass%Cr-Ni Alloys with Ni Contents of 8, 11, 14 and 20 Mass%. ISIJ International. 59 [3] (2019) 459-465 10.2355/isijinternational.isijint-2018-726
  2. Tomohiro Nishimura, Kohei Morishita, Masato Yoshiya, Tomoya Nagira, Hideyuki Yasuda. Time-resolved and <i>In-situ</i> Observation of δ-γ Transformation during Unidirectional Solidification in Fe-C Alloys. Tetsu-to-Hagane. 105 [2] (2019) 290-298 10.2355/tetsutohagane.tetsu-2018-145
  3. T. Nagira, X. C. Liu, K. Ushioda, Y. Iwamoto, G. Ano, H. Fujii. Role of annealing twinning in microstructural evolution of high purity silver during friction stir welding. Science and Technology of Welding and Joining. 24 [7] (2019) 644-651 10.1080/13621718.2019.1592931
  4. X.C. Liu, Y.F. Sun, T. Nagira, K. Ushioda, H. Fujii. Evaluation of dynamic development of grain structure during friction stir welding of pure copper using a quasi in situ method. Journal of Materials Science & Technology. 35 [7] (2019) 1412-1421 10.1016/j.jmst.2019.01.018
  5. X.C. Liu, Y.F. Sun, T. Nagira, K. Ushioda, H. Fujii. Strain rate dependent micro-texture evolution in friction stir welding of copper. Materialia. 6 (2019) 100302 10.1016/j.mtla.2019.100302
2018
  1. X. C. Liu, Y. F. Sun, T. Nagira, K. Ushioda, H. Fujii. Microstructure evolution of Cu–30Zn during friction stir welding. Journal of Materials Science. 53 [14] (2018) 10423-10441 10.1007/s10853-018-2313-5
  2. X.C. Liu, Y.F. Sun, T. Nagira, H. Fujii. Investigation of temperature dependent microstructure evolution of pure iron during friction stir welding using liquid CO2 rapid cooling. Materials Characterization. 137 (2018) 24-38 10.1016/j.matchar.2018.01.004
2017
  1. Iori Uwabe, Kento Dobara, Kohei Morishita, Tomoya Nagira, Hideyuki Yasuda. <i>In-situ</i> Measurement of Solute Partition Coefficient in Fe-Cr-Ni-Mo Alloys by Using X-ray Imaging and X-ray Florescence Analysis. Tetsu-to-Hagane. 103 [12] (2017) 678-687 10.2355/tetsutohagane.tetsu-2017-077
  2. K.M. Kareh, C. O'Sullivan, T. Nagira, H. Yasuda, C.M. Gourlay. Dilatancy in semi-solid steels at high solid fraction. Acta Materialia. 125 (2017) 187-195 10.1016/j.actamat.2016.11.066
2016
  1. Tomoya Nagira, Noriaki Nakatsuka, Hideyuki Yasuda, Kentaro Uesugi, Akihisa Takeuchi. <i>In situ</i> Observation of Dendrite Growth in Sn-Bi Alloys under Ultrasonic Vibration Using Time-resolved X-ray Imaging. Tetsu-to-Hagane. 102 [3] (2016) 170-178 10.2355/tetsutohagane.tetsu-2015-080
2015
  1. Masato Yoshiya, Kenta Nakajima, Manabu Watanabe, Nobufumi Ueshima, Tomoya Nagira, Hideyuki Yasuda. Interface Energies of Hetero- and Homo-Phase Boundaries and Their Impact on &delta;-&gamma; Massive-Like Phase Transformations in Carbon Steel. MATERIALS TRANSACTIONS. 56 [9] (2015) 1461-1466 10.2320/matertrans.ma201568
  2. Yosuke Suzuki-Yamamoto, Ryota Ozaki, Masato Yoshiya, Tomoya Nagira, Hideyuki Yasuda. Yet Another Marked Difference among Impurities as Modifier Elements for Refinement of Eutectic Si in Al-Si Alloys. MATERIALS TRANSACTIONS. 56 [9] (2015) 1475-1483 10.2320/matertrans.ma201576
  3. Masato Yoshiya, Manabu Watanabe, Kenta Nakajima, Nobufumi Ueshima, Koki Hashimoto, Tomoya Nagira, Hideyuki Yasuda. Concurrent &gamma;-Phase Nucleation as a Possible Mechanism of &delta;-&gamma; Massive-like Phase Transformation in Carbon Steel: Numerical Analysis Based on Effective Interface Energy. MATERIALS TRANSACTIONS. 56 [9] (2015) 1467-1474 10.2320/matertrans.ma201569
  4. K. Yamane, Hideyuki Yasuda, A. Sugiyama, T. Nagira, M. Yoshiya, K. Morishita, K. Uesugi, A. Takeuchi, Y. Suzuki. Influence of Mg on Solidification of Hypereutectic Cast Iron: X-ray Radiography Study. Metallurgical and Materials Transactions A. 46 [11] (2015) 4937-4946 10.1007/s11661-015-3077-z
  5. Tomoya Nagira, Noriaki Nakatsuka, Hideyuki Yasuda, Kentaro Uesugi, Akihisa Takeuchi, Yoshio Suzuki. Impact of melt convection induced by ultrasonic wave on dendrite growth in Sn–Bi alloys. Materials Letters. 150 (2015) 135-138 10.1016/j.matlet.2015.02.069
  6. S Morita, H Yasuda, T Nagira, C M Gourlay, K Morishita, M Yoshiya, A Sugiyama. Application of a macroscopic model to predict the band segregation induced by shear deformation of semisolid. IOP Conference Series: Materials Science and Engineering. 84 (2015) 012011 10.1088/1757-899x/84/1/012011
  7. T Nagira, S Morita, H Yasuda, C M Gourlay, M Yoshiya, A Sugiyama, K Uesugi. Localization of shear strain and shear band formation induced by deformation in semi-solid Al-Cu alloys. IOP Conference Series: Materials Science and Engineering. 84 (2015) 012078 10.1088/1757-899x/84/1/012078
  8. M Yoshiya, M Sato, M Watanabe, K Nakajima, T Yokoi, N Ueshima, T Nagira, H Yasuda. Impacts of Interface Energies and Transformation Strain from BCC to FCC on Massive-like δ-γ Transformation in Steel. IOP Conference Series: Materials Science and Engineering. 84 (2015) 012049 10.1088/1757-899x/84/1/012049
  9. T Nishimura, K Morishita, T Nagira, M Yoshiya, H Yasuda. Kinetics of the δ/γ interface in the massive-like transformation in Fe-0.3C-0.6Mn-0.3Si alloys. IOP Conference Series: Materials Science and Engineering. 84 (2015) 012062 10.1088/1757-899x/84/1/012062
2014
  1. Tomoya Nagira, Shugo Morita, Hiroyoshi Yokota, Hideyuki Yasuda, Christopher M. Gourlay, Masato Yoshiya, Akira Sugiyama, Kentaro Uesugi, Akihisa Takeuchi, Yoshio Suzuki. In Situ Observation of Deformation in Semi-solid Fe-C Alloys at High Shear Rate. Metallurgical and Materials Transactions A. 45 [12] (2014) 5613-5623 10.1007/s11661-014-2489-5
2013
  1. Tomoya Nagira, Hiroyoshi Yokota, Shugo Morita, Hideyuki Yasuda, Masato Yoshiya, Christopher M. Gourlay, Akira Sugiyama, Kentarou Uesugi, Keiji Umetani. Characterization of Shear Deformation Based on In-situ Observation of Deformation in Semi-solid Al–Cu Alloys and Water-particle Mixture. ISIJ International. 53 [7] (2013) 1195-1201 10.2355/isijinternational.53.1195
  2. Tomoya Nagira, Hiroyoshi Yokota, Shugo Morita, Hideyuki Yasuda, Masato Yoshiya, C.M. Gourlay, Akira Sugiyama, Kentarou Uesugi, Keiji Umetani. Characterization of Shear Deformation Based on In-situ Observation of Deformation in Semi-Solid Al-Cu Alloys and Water-Particle Mixture. Tetsu-to-Hagane. 99 [2] (2013) 141-148 10.2355/tetsutohagane.99.141
  3. Kazuhiro Nogita, Hideyuki Yasuda, Arvind Prasad, Stuart D. McDonald, Tomoya Nagira, Noriaki Nakatsuka, Kentaro Uesugi, David H. StJohn. Real time synchrotron X-ray observations of solidification in hypoeutectic Al–Si alloys. Materials Characterization. 85 (2013) 134-140 10.1016/j.matchar.2013.08.015
  4. J. Fonseca, C. O’Sullivan, T. Nagira, H. Yasuda, C.M. Gourlay. In situ study of granular micromechanics in semi-solid carbon steels. Acta Materialia. 61 [11] (2013) 4169-4179 10.1016/j.actamat.2013.03.043
2012
  1. Tomoya Nagira, Hideyuki Yasuda, Takumi Sakimura, Kentarou Yoshida. Solidification of Al2O3–YAG eutectic composites with off-metastable eutectic composition from undercooled melt produced by melting Al2O3–YAP eutectics. Journal of the European Ceramic Society. 32 [10] (2012) 2137-2143 10.1016/j.jeurceramsoc.2012.02.007
  2. S Morita, H Yasuda, T Nagira, C M Gourlay, M Yoshiya, A Sugiyama. Macroscopic modelling of semisolid deformation for considering segregation bands induced by shear deformation. IOP Conference Series: Materials Science and Engineering. 33 (2012) 012053 10.1088/1757-899x/33/1/012053
  3. H Yasuda, T Nagira, M Yoshiya, A Sugiyama, N Nakatsuka, M Kiire, M Uesugi, K Uesugi, K Umetani, K Kajiwara. Massive transformation fromδphase toγphase in Fe–C alloys and strain induced in solidifying shell. IOP Conference Series: Materials Science and Engineering. 33 (2012) 012036 10.1088/1757-899x/33/1/012036
  4. H Yasuda, T Nagira, M Yoshiya, M Uesugi, N Nakatsuka, M Kiire, A Sugiyama, K Uesugi, K Umetani. In-situobservation of peritectic solidification in Sn-Cd and Fe-C alloys. IOP Conference Series: Materials Science and Engineering. 27 (2012) 012084 10.1088/1757-899x/27/1/012084
2011
  1. Hideyuki Yasuda, Tomoya Nagira, Masato Yoshiya, Noriaki Nakatsuka, Akira Sugiyama, Kentaro Uesugi, Keiji Umetani. Development of X-ray Imaging for Observing Solidification of Carbon Steels. ISIJ International. 51 [3] (2011) 402-408 10.2355/isijinternational.51.402
  2. C.M. Gourlay, A.K. Dahle, T. Nagira, N. Nakatsuka, K. Nogita, K. Uesugi, H. Yasuda. Granular deformation mechanisms in semi-solid alloys. Acta Materialia. 59 [12] (2011) 4933-4943 10.1016/j.actamat.2011.04.038
  3. C.M. Gourlay, K. Nogita, A.K. Dahle, Y. Yamamoto, K. Uesugi, T. Nagira, M. Yoshiya, H. Yasuda. In situ investigation of unidirectional solidification in Sn–0.7Cu and Sn–0.7Cu–0.06Ni. Acta Materialia. 59 [10] (2011) 4043-4054 10.1016/j.actamat.2011.03.028
  4. T. Nagira, C.M. Gourlay, A. Sugiyama, M. Uesugi, Y. Kanzawa, M. Yoshiya, K. Uesugi, K. Umetani, H. Yasuda. Direct observation of deformation in semi-solid carbon steel. Scripta Materialia. 64 [12] (2011) 1129-1132 10.1016/j.scriptamat.2011.03.009
2010
  1. Hideyuki Yasuda, S. Kato, T. Shinba, T. Nagira, M. Yoshiya, Akira Sugiyama, K. Umetani, Kentaro Uesugi. Regular Structure Formation of Hypermonotectic Al-In Alloys. Materials Science Forum. 649 (2010) 131-136 10.4028/www.scientific.net/msf.649.131
2009
  1. Tomoya Nagira, Hideyuki Yasuda, Satoshi Takeshima, Takumi Sakimura, Yoshiharu Waku, Kentaro Uesugi. Chain structure in the unidirectionally solidified Al2O3–YAG–ZrO2 eutectic composite. Journal of Crystal Growth. 311 [14] (2009) 3765-3770 10.1016/j.jcrysgro.2009.05.004
  2. Noriaki Nakatsuka, Hideyuki Yasuda, Tomoya Nagira, Masato Yoshiya. Three-dimensional alignment of FeSi2with orthorhombic symmetry by an anisotropic magnetic field. Journal of Physics: Conference Series. 165 (2009) 012021 10.1088/1742-6596/165/1/012021
  3. Tomoya Nagira, Hideyuki Yasuda, Masato Yoshiya. Formation and microstructure of Al2O3-YAG eutectic ceramics by phase transformation from metastable system to equilibrium system. Journal of Physics: Conference Series. 165 (2009) 012006 10.1088/1742-6596/165/1/012006
  4. H Yasuda, D Nagamatsu, T Yoshimoto, T Nagira, M Yoshiya, Y Yokoyama, A Inoue. Crystal growth in the bulk-metallic-glass Zr-based alloys by using the DC + AC levitation method. Journal of Physics: Conference Series. 144 (2009) 012056 10.1088/1742-6596/144/1/012056
2008
  1. H. Yasuda, Y. Yamamoto, N. Nakatsuka, T. Nagira, M. Yoshiya, A. Sugiyama, I. Ohnaka, K. Umetani, K. Uesugi. In situobservation of nucleation, fragmentation and microstructure evolution in Sn–Bi and Al–Cu alloys. International Journal of Cast Metals Research. 21 [1-4] (2008) 125-128 10.1179/136404608x361800
2004
  1. Mikio Ito, Tomoya Nagira, Daisuke Furumoto, Yoshimitsu Oda, Shigeta Hara. Synthesis of NaxCo2O4thermoelectric oxide with crystallographic anisotropy by chemical solution process. Science and Technology of Advanced Materials. 5 [1-2] (2004) 125-131 10.1016/j.stam.2003.09.009

書籍 TSV

会議録 TSV

口頭発表 TSV

2020
  1. 柳樂 知也, 劉 小超, 潮田 浩作, 藤井 英俊. 低い積層欠陥エネルギーを有するfcc金属におけるFSW中の微細組織形成機構の解明. 2020年度溶接学会秋季全国大会. 2020

その他の文献 TSV

特許 TSV

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