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Hokkaido University Collection of Scholarly and Academic Papers >
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(Nb)/(Nb, Ti)5Si3二相合金の機械的性質に及ぼすラメラー間隔の影響
| Title: | (Nb)/(Nb, Ti)5Si3二相合金の機械的性質に及ぼすラメラー間隔の影響 |
| Other Titles: | Effect of Lamellar Spacing on the Mechanical Properties of (Nb)/(Nb, Ti)5Si3 Two-Phase Alloys |
| Authors: | 関戸, 信彰1 Browse this author | | 木村, 好里2 Browse this author | | 韋, 富高3 Browse this author | | 三浦, 誠司4 Browse this author →KAKEN DB | | 三島, 良直5 Browse this author |
| Authors(alt): | Sekido, Nobuaki1 | | Kimura, Yoshisato2 | | Wei, Fu-Gao3 | | Miura, Seiji4 | | Mishima, Yoshinao5 |
| Keywords: | niobium alloy | | intermetallic compound | | multi-phase alloy | | microstrucute | | eutectoid decomposition | | lamellar spacing | | room temperature toughness | | high temperature strength |
| Issue Date: | 1-Nov-2000 |
| Publisher: | 日本金属学会 |
| Journal Title: | 日本金属学会誌 |
| Journal Title(alt): | Journal of the Japan Institute of Metals |
| Volume: | 64 |
| Issue: | 11 |
| Start Page: | 1056 |
| End Page: | 1061 |
| Publisher DOI: | 10.2320/jinstmet1952.64.11_1056 |
| Abstract: | Effects of lamellar spacing on the mechanical properties of (Nb)/(Nb, Ti)5Si3 two-phase alloys with a fine lamellar structure have been investigated for an improvement in room-temperature toughness and high-temperature strength. Lamellar spacing of the alloy are controlled, without changing the volume fraction and composition of each phase, by varying annealing temperature for the decomposition of high-temperature phase (Nb, Ti)3Si into (Nb) and (Nb, Ti)5Si3. A Time-Temperature-Transformation diagram (TTT diagram) was determined for a Nb-25 mol%Si-10 mol%Ti alloy. It was found that the decomposition of (Nb, Ti)3Si in the Nb-Si-Ti system is kinetically faster than that of Nb3Si in the binary Nb-Si system. Average lamellar spacing, λ , of the alloy is characterized by the degree of super-cooling, ΔT, following a relationship as “λ∝1⁄ΔT”. Coarse lamellar structure shows better room temperature compressive plastic strain before fracture and higher elevated temperature strength. The alloys investigated in this study show superior compressive strength at over 1000°C as compared with some commercial Ni-based superalloys. |
| Type: | article |
| URI: | http://hdl.handle.net/2115/75127 |
| Appears in Collections: | 工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 三浦 誠司
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