| Project/Area Number |
60850133
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| Research Category |
Grant-in-Aid for Developmental Scientific Research
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| Allocation Type | Single-year Grants |
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| Research Field |
金属材料(含表面処理・腐食防食)
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| Research Institution | Faculty of Engineering, Kansai University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
源 堅樹 (株)神戸製鋼所, 軽合金伸銅事業部・研究部, 主任研究員 (30160542)
NAKAO Kazuyoshi Assistant, 工学部, 助手 (40067632)
KAMEI Kiyoshi Professor, 工学部, 教授 (70067411)
AKAMATSU Katsuya Professor, 工学部, 教授 (70067643)
KOMATSU Shinay Professor, 工学部, 教授 (90067637)
MINAMOTO Kenji Chief Research Engineer
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| Project Period (FY) |
1985 – 1986
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| Project Status |
Completed (Fiscal Year 1986)
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| Budget Amount *help |
¥9,500,000 (Direct Cost: ¥9,500,000)
Fiscal Year 1986: ¥3,000,000 (Direct Cost: ¥3,000,000)
Fiscal Year 1985: ¥6,500,000 (Direct Cost: ¥6,500,000)
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| Keywords | Cu-base Shape Memory Alloy / Rapid Solidification Techniques / Powder Metallurgy / 変態温度の調整法 / 銅基形状記憶合金 / 結晶粒微細化 / 超急冷凝固 / 粉末冶金法 |
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| Research Abstract |
Although Cu-base shape memory alloys (SMA) have the large potential to be used as new functional materials owing to a lower price compared with that of the Ni-Ti SMA, the application seems to be limited by the reason that ordinary polycrystalline materials have a rather low ductility in case of a coarse grain structure, which may be an inherent property of these alloy systems.
The present investigation has been carried out to improve a ductility in Cu-Al-Ni-Mn SMA by grain refinement using a rapid solidification techniques combined with powder metallurgy(P/M) method. At the same time, it has been also made to develope the technological method of controlling transformation temperatures of SMA by P/M method, which consists of mixing the two kinds of standerd alloys with the definite transformation temperature.
It was found that the addition of 1% Ti and 0.2%V to 4032III alloy developed by the research group of Kansai University was most effective to obtain the small grain size such as 3-4 <mu> m even after annealing for 30 min at 900゜C in the specimen prepared by RSP-P/M. These specimens showed a fairly improved hot and cold deformability together with a good SM effect. However, the transformation temperatures were found to be affected considerably due to the grain size with the order of several micron metres as well as the fine distribution of the compounds, which plays an important role for restriction to grain growth during annearing. The method of controlling the transformation temperatures of SAM has been established by RSP-P/M using the two previously prepared RSP, which has the difinit transformation temperature. These specimen showed to have agood ductility by SEM fractograpy.
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