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論文 - 髙田　尚記

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Creep of Super Advanced Fe-Cr-Ni-Nb Austenitic Heat Resistant Steels at 1073 K for A-USC Power Plant 査読有り

Shion Mise, Taro Osaka,Takahiro Kimura, Naoki Takata, Satoru Kobayashi, Masao Takeyama

Proceedings of The 1st International Conference on Advanced High-Temperature Materials Technology for Sustainable and Reliable Power Engineering (123HiMAT-2015) 頁： 165-168 2015年6月

Microstructural Characterization of Gamma Prime Precipitates in Wrought Ni-Based Superalloy Inconel X-750 査読有り

Hiromu Hisazawa, Yoshihiro Terada, Naoki Takata, Masao Takeyama

Proceedings of The 1st International Conference on Advanced High-Temperature Materials Technology for Sustainable and Reliable Power Engineering (123HiMAT-2015) 頁： 250-253 2015年6月

Effect of Ti Addition on the Formation of Fe2Nb (TCP) and Ni3Nb (GCP) Phases in Fe-20Cr-35Ni-2.5Nb Austenitic Heat Resistant Steel at 1073 K 査読有り

Hongmei Li, Fagang Gao, Naoki Takata, Satoru Kobayashi, Masao Takeyama

Proceedings of The 1st International Conference on Advanced High-Temperature Materials Technology for Sustainable and Reliable Power Engineering (123HiMAT-2015) 頁： 161-164 2015年6月

In-Situ Tensile Observation at 1073 K in Laves Phase Strengthened Fe-20Cr-30Ni-2Nb Steels 査読有り

Mari Yoshihara, Naoki Takata, Masao Takeyama

Proceedings of The 1st International Conference on Advanced High-Temperature Materials Technology for Sustainable and Reliable Power Engineering (123HiMAT-2015) 頁： 153-156 2015年6月

3D Observation of Grain Boundary Precipitation of Fe2Nb Laves Phase in a Novel Austenitic Heat Resistant Steel Fe-20Cr-35Ni-2.5Nb 査読有り

Fagang Gao, Naoki Takata, Satoru Kobayashi, Masao Takeyama

Proceedings of The 1st International Conference on Advanced High-Temperature Materials Technology for Sustainable and Reliable Power Engineering (123HiMAT-2015) 頁： 35-38 2015年6月

Ultrafine ferrite formation through cold-rolling and annealing of low-carbon dual-phase steel 査読有り

Yoshitaka Okitsu, Naoki Takata, Nobuhiro Tsuji

Journal of Materials Science & Technology 31 巻頁： 745-754 2015年3月

Crystallography of Bcc/T1/T2 Three-Phase Microstructure in the Directionally Solidified Mo-Nb-Si-B Alloy 査読有り

Naoki Takata, Nobuaki Sekido, Masao Takeyama, John H. Perepezko

Mater. Res. Soc. Symp. Proc. 1760 巻頁： mrsf14-1760-yy03-03 2015年3月

Morphology and formation of Fe-Al intermetallic layers on iron hot-dipped in Al-Mg-Si alloy melt 査読有り

Takata Naoki, Nishimoto Manamu, Kobayashi Satoru, Takeyama Masao

INTERMETALLICS 54 巻頁： 136-142 2014年11月

6111アルミニウム合金のリジング発生に及ぼす加工熱処理の影響とCube方位粒形成過程査読有り

池田賢一，宮田幸昌，吉原隆浩，高田尚記，中島英治

軽金属 64 巻 ( 8 ) 頁： 353-360 2014年8月

溶融Znめっき鋼板のFe/Zn固液界面反応に及ぼす鋼板組織の影響査読有り

高田尚記, 竹山雅夫

鉄と鋼 100 巻 ( 9 ) 頁： 1172-1179 2014年

記述言語：日本語掲載種別：研究論文（学術雑誌）

We have examined the growth kinetics of Fe-Zn intermetallics layers formed on Fe-1.5Mn (α-Fe single phase) and Fe-3.5Mn-0.1C (γ-Fe+α-Fe two phase) steel sheets dipped in pure Zn melt at 460 ºC. In an early stage of dipping, FeZn13-ζ phase layer is initially formed and its thickness slightly increases with increasing dipping time till about 10 s, and then all Fe-Zn intermetallics layers (ζ, δ1, Γ) grow following a parabolic law. The growth kinetics can be recognized in both steels. This result demonstrates a slight effect of steel microstructure on the formation of Fe-Zn intermetallics layers. The composition analysis revealed a significant Fe dissolution into pure Zn melt in an early stage of dipping. The supersaturated Fe in Zn melt would provide the driving force for the crystallization of ζ phase layer on steel sheets. The continuous layer of ζ phase would control Fe diffusion for the following growth of the other Fe-Zn intermetallics layers.

Fe-20Cr-30Ni-2Nbオーステナイト系耐熱鋼の水蒸気雰囲気クリープに及ぼす粒界Laves相の効果査読有り

味噌作裕, Imanuel Tarigan, 木村尭弘, 高田尚記, 上田光敏, 丸山俊夫, 竹山雅夫

鉄と鋼 100 巻 ( 9 ) 頁： 1158-1164 2014年

記述言語：日本語掲載種別：研究論文（学術雑誌）

Creep of carbon free Fe-20Cr-30Ni-2Nb (at.%) steels strengthened by Fe2Nb Laves phase on grain boundaries has been examined in air and steam atmospheres at 1073 K/70 MPa. Sufficiently covering grain boundaries by stable Laves phase can reduce the creep rate, resulting in a significant extension of the creep rupture life without a loss of creep ductility in steam atmosphere as well as air. This effect becomes remarkable in higher area fractions of Laves phase on grain boundaries (ρ) than 80%. The creep rupture strain slightly decrease by steam atmosphere, which would be associated with the interglanular oxidation and its related cracks propagation along grain boundaries enhanced by steam atmosphere in the creep acceleration stage. Its effect can be suppressed by covering grain boundaries by Laves phase (increasing ρ). Therefore, Grain Boundary Precipitation Strengthening by stable Laves phase is a key mechanism for use of materials for boiler tubes in the innovative advanced ultra-super critical (A-USC) thermal power plants to be operated above 973 K.

CREEP OF THE NOVEL AUSTENITIC HEAT RESISTANT STEEL OF FE-20CR-30NI-2NB UNDER STEAM ATMOSPHERE AT 1073 K 査読有り

Yu Misosaku, Imanuel Tarigan, Naoki Takata, Mitsutoshi Ueda, Toshio Maruyama, Masao Takeyama

Advances in Materials Technology for Fossil Power Plants (Proceedings from 8th International Conference, October 22-25, 2013, Waikoloa, Hawaii, USA) 頁： 1352-1362 2013年10月

Plastic deformation of the C14 Laves phase (Fe,Ni)(2)Nb 査読有り

Takata N., Armaki H. Ghassemi, Terada Y., Takeyama M., Kumar K. S.

SCRIPTA MATERIALIA 68 巻 ( 8 ) 頁： 615-618 2013年4月

Effect of Dislocation Sources on Slip in Fe2Nb Laves Phase with Ni in Solution 査読有り

N. Takata, H. Ghassemi Armaki, Y. Terada, M. Takeyama, K. S. Kumar

Mater. Res. Soc. Symp. Proc. 1516 巻頁： 269-274 2012年12月

Dynamic deformation behavior of ultrafine-grained iron produced by ultrahigh strain deformation and annealing 査読有り

Okitsu Yoshitaka, Takata Naoki, Tsuji Nobuhiro

SCRIPTA MATERIALIA 64 巻 ( 9 ) 頁： 896-899 2011年5月

Susceptibility to Hydrogen Embrittlement of IF Steel with Ultrafine-Grained Structure Produced by Accumulative Roll-Bonding Process 査読有り

. Haruna, T. Nakagawa, D. Terada, N. Takata, N. Tsuji

Materials Science Forum 654-656 巻頁： 1235-1238 2010年8月

Analysis of deformation behaviors of ultrafine grained Cu-30%Zn with bimodal grain-size distribution 査読有り

Morimitsu Takatoshi, Takata Naoki, Terada Daisuke, Tsuji Nobuhiro

15TH INTERNATIONAL CONFERENCE ON THE STRENGTH OF MATERIALS (ICSMA-15) 240 巻 2010年

Ultrafine grained copper alloy sheets having both high strength and high electric conductivity 査読有り

Takata Naoki, Lee Seong-Hee, Tsuji Nobuhiro

MATERIALS LETTERS 63 巻 ( 21 ) 頁： 1757-1760 2009年8月

Increasing the ductility of ultrafine-grained copper alloy by introducing fine precipitates 査読有り

Takata Naoki, Ohtake Yusuke, Kita Kazuhisa, Kitagawa Kazuo, Tsuji Nobuhiro

SCRIPTA MATERIALIA 60 巻 ( 7 ) 頁： 590-593 2009年4月

超強加工された純銅の粒界構造査読有り

池田賢一, 山田康介, 高田尚記, 吉田冬樹, 中島英治, 辻伸泰

ふぇらむ : 日本鉄鋼協会会報 = Bulletin of the Iron and Steel Institute of Japan 14 巻 ( 1 ) 頁： . 2009年1月

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