| Project/Area Number |
24760082
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Materials/Mechanics of materials
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| Research Institution | The University of Kitakyushu (2013-2014)
Oita University (2012) |
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Principal Investigator |
CHO Hiroki 北九州市立大学, 国際環境工学部, 准教授 (00435421)
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| Project Period (FY) |
2012-04-01 – 2015-03-31
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| Project Status |
Completed (Fiscal Year 2014)
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| Budget Amount *help |
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2014: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2013: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2012: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
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| Keywords | 形状記憶合金 / アクチュエータ / 熱エンジン / 低温排熱回収 / 機械的特性 / 疲労特性 / 低温排熱エネルギー回収 / 金属組織 / 排熱回収 / 疲労強度 |
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| Outline of Final Research Achievements |
Effects of applied strain during heat-treatment and surface smoothness on mechanical characteristics and fatigue characteristics of Ti-Ni shape memory alloy (SMA) are investigated. From the results, the applied strain during heat-treatment has a small influence on fatigue characteristics of Ti-Ni SMA. However, mechanical and shape memory characteristics of Ti-Ni SMA are improved by the heat-treatment under applying strain above 10%. Moreover, fatigue characteristics of Ti-Ni SMA is improved with the surface smoothing of SMA sample. Furthermore, fatigue characteristics are improved by nylon-coating even if mechanical polished sample.
Meanwhile, we develop a new heat engine (the belt-driven type heat-engine) to improve the output power of heat engine using SMA spiral spring actuators, and investigate output characteristics of this engine. In consequence, the output efficiency of the new engine is 20 % higher than that of the previous type heat-engine using a spiral spring actuator.
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