研究者詳細 - 徳永　透子

論文 - 徳永　透子

分割表示 37 件中 1 - 20 件目／全件表示 >>

High-temperature strength and kink-band formation in mille-feuille-structured Ti/FeTi eutectic alloys 査読あり

T. Tokunaga, T. Yonemura, K. Hagihara

Materials Science and Engineering A 900 146505 2024年04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）

DOI： https://doi.org/10.1016/j.msea.2024.146505

New kink-band formation mechanism discovered in Zn-Al alloy with mille-feuille microstructure 査読あり国際誌

K. Hagihara, S. Ohsawa, T. Tokunaga

Materials & Design 239 112767 2024年03月

担当区分：最終著者記述言語：英語掲載種別：研究論文（学術雑誌）

DOI： https://doi.org/10.1016/j.matdes.2024.112767

Effect of rolling and alloying elements on the impact properties of hypereutectoid steels 査読あり

T. Tokunaga, Y. Minamino, K. Yamamoto, T. Sugimoto, K. Hagihara

ISIJ International 64 ( 6 ) 1078 - 1088 2024年02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）

DOI： https://doi.org/10.2355/isijinternational.ISIJINT-2023-453

Contributions of multimodal microstructure in the deformation behavior of extruded Mg alloys containing LPSO phase 査読あり

K. Hagihara, T. Mayama, M. Yamasaki, S. Harjo, T. Tokunaga, K. Yamamoto, M. Sugita, K. Aoyama, W. Gong, S. Nishimoto

International Journal of Plasticity 173 103865 2024年02月

記述言語：英語掲載種別：研究論文（学術雑誌）

DOI： https://doi.org/10.1016/j.ijplas.2023.103865

Effects of cementite particles on impact properties in high-hardness hypereutectoid steels 査読あり

T. Tokunaga, K. Yamamoto, Y. Minamino, T. Takayama, T. Sugimoto, K. Hagihara

ISIJ International 64 ( 2 ) 2024年

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）

Kink-band formation in the directionally-solidified Mg/LPSO two-phase alloys 査読あり

T. Tokunaga, K. Hagihara, M. Yamasaki, T. Mayama, K. Yamamoto, H. Narimoto, T. Kida, Y. Kawamura, T. Nakano

Science and Technology of Advanced Materials 2022年10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）

DOI： https://doi.org/10.1080/14686996.2022.2137696

Microstructural factors governing the significant strengthening of Al/Al2Cu mille-feuille structured alloys accompanied by kink-band formation 査読あり国際共著

K. Hagihara, T. Tokunaga, S. Ohsawa, S. Uemichi, K. Guan, D. Egusa, E.Abe

International Journal of Plasticity 158 103419 2022年09月

記述言語：英語掲載種別：研究論文（学術雑誌）

DOI： https://doi.org/10.1016/j.ijplas.2022.103419

青森県量子科学センターにおけるBNCT

徳永透子, 八戸慎吾, 菊池洋好, 馬場豊美

インナービジョン 36 ( 2 ) 62 - 63 2021年02月

掲載種別：研究論文（学術雑誌）

Microstructure refinement and mechanical properties improvement of Al-Si-Fe alloys by hot extrusion using a specially designed high-strain die 査読あり

酒向志乃, 徳永透子, 大野宗一, 松浦清隆

Journal of Materials Processing Technology 277 ( 116447 ) 1 - 9 2020年

記述言語：英語掲載種別：研究論文（学術雑誌）

Development of High Corrosion- and Wear-Resistant Al-Si Alloy Coating on AZ80 Mg Alloy by Hot Extrusion 査読あり

Toko Tokunaga, Kazushi Sotomoto, Munekazu Ohno, Kiyotaka Matsuura

Journal of Materials Engineering and Performance 29 6355 - 6362 2020年

記述言語：英語掲載種別：研究論文（学術雑誌）

Enhancement of ductility for Al–Si–Fe alloy by refining β phase with a novel ball-die extrusion 査読あり

徳永透子, 犬伏晴紀

SN Applied Sciences 1 ( 10 ) 1334 2019年10月

記述言語：英語掲載種別：研究論文（学術雑誌）

DOI： 10.1007/s42452-019-1377-4

その他リンク： http://link.springer.com/article/10.1007/s42452-019-1377-4/fulltext.html

Microstructure evolution during superplastic deformation of an Al-coated Mg alloy sheet 査読あり

T. Tokunaga, M. Ohno

Journal of Alloys and Compounds 805 436 - 443 2019年

記述言語：英語掲載種別：研究論文（学術雑誌）

Fabrication of Al-Coated Mg-Li Alloy Sheet and Investigation of Its Properties 査読あり

T. L. Zhang, T. Tokunaga, M. Ohno, M. L. Zhang, K. Matsuurah

Acta Metallurgica Sinica (English Letters) 32 169 - 177 2019年

記述言語：英語掲載種別：研究論文（学術雑誌）

Microstructure evolution in superplastic Al/Mg/Al clad sheet 査読あり

T. Tokunaga, K. Matsuura, M. Ohno

Proceedings of 16th Inter-national Conference on Aluminum Alloys (ICAA16) 2018年

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）

Coating on magnesium alloy with super duralumin by hot extrusion and evaluation of its surface properties 査読あり

Toko Tokunaga, Kazushi Sotomoto, Munekazu Ohno, Kiyotaka Matsuura

Materials Transactions 59 ( 3 ) 432 - 436 2018年

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：Japan Institute of Metals (JIM)

The poor corrosion resistance of Mg alloys, which is well known as one of the lightest structural metal materials, limits a wide use of these alloys. In order to dramatically increase not only the corrosion resistance but also the surface hardness of Mg alloys (AZ80), coating with A2024 Al alloy by hot extrusion has been attempted in this study. The coating was successfully realized by hot extrusion of a Mg alloy (AZ80) billet together with an Al alloy plate placed between the billet and the extrusion die. The A2024 Al alloy-coated Mg alloy exhibited an excellent corrosion resistance and no weight loss was observed after immersion in a 5 mass% HCl aqueous solution for 10 min while a weight loss of about 1500 g･m−2 was observed in case of AZ80 Mg alloy without coating under the same condition. The surface hardness of the coated alloy was increased to about 85 HV by aging for 144 h at room temperature after solution treatment for 3 h at 673 K.

DOI： 10.2320/matertrans.M2017317

Brazed Bonding between SiAlON and heat-resistant alloys with application of filler materials 査読あり

Toko Tokunaga, Masayuki Koshiyama, Kazuya Kurokawa, Munekazu Ohno, Kiyotaka Matsuura

Materials Transactions 59 ( 6 ) 969 - 975 2018年

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：Japan Institute of Metals (JIM)

It has been required to improve the heat efficiency of thermal power generation system for the sake of mitigation of the global warming and resource depletion problems. For improving the heat efficiency, it is effective to increase the steam temperature, and as a result, appropriate heatresistant alloys are needed. Although SUS304 stainless steel and Ni-based superalloys have been proposed as promising heat-resistant alloys until now, there still remain some concerns such as high-temperature corrosion by flaming gas and erosion by combustion ash. Thus, the present authors propose SiAlON ceramic coating on SUS304 and INCONEL X-750 because SiAlON has excellent heat, wear and corrosion resistances. In the present study, brazed bonding between SiAlON and these heat-resistant alloys was attempted with the applications of Cu and Ag as a soft filler material to reduce the residual stress generated due to the difference in thermal expansion coefficient between SiAlON and the heat-resistant alloys. As for the bonding with the Cu filler, the SiAlON/Cu/SUS joint was successful when the brazing time was short. However, when the brazing time was long (for example, 60 minutes), Fe-based grains were formed in the Cu filler layer, and the cracks were formed in the SiAlON near the joint interface during cooling in the brazing process. It was considered that the Cu filler was hardened by the formation of the Fe-based grains and could not reduce the residual stress. As for the bonding with the Ag filler, on the other hand, the SiAlON/Ag/SUS joint was successful even for a long brazing time. The SiAlON/Ag/INCONEL joint was also successful. The bending strengths of these SiAlON/Cu/SUS, SiAlON/Ag/SUS and SiAlON/Ag/INCONEL joints were evaluated by a three point bending test, and the results were approximately 200, 270 and 350 MPa, respectively. In all cases fracture occurred in the SiAlON, which means that the SiAlON and the alloys were strongly bonded.

DOI： 10.2320/matertrans.M2018038

Low temperature superplasticity of a dual-phase Mg-Li-Zn alloy processed by a multi-mode deformation process 査読あり

T. L. Zhang, T. Tokunaga, M. Ohno, R. Z. Wu, M. L. Zhang

Materials Science & Engineering A 737 61 - 68 2018年

記述言語：英語掲載種別：研究論文（学術雑誌）

熱間押出法を用いた炭素繊維一方向配向Cu基複合材料の作製と熱伝導特性評価査読あり

紺谷博人, 徳永透子, 大野宗一, 佐々木克彦, 松浦清隆

日本金属学会誌 82 ( 5 ) 125 - 129 2018年

記述言語：日本語掲載種別：研究論文（学術雑誌）

DOI： 10.2320/jinstmet.J2017047

Coatings on Mg alloys and their mechanical properties (review) 査読あり

T. Tokunaga, M. Ohno, K. Matsuura