| Project/Area Number |
10480242
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| Research Category |
Grant-in-Aid for Scientific Research (B).
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Biomedical engineering/Biological material science
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| Research Institution | Tokyo Medical and Dental University |
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Principal Investigator |
YONEYAMA Takayuki Tokyo Med.and Dent.Univ., Inst.of Biomaterials and Bioengineering, Associate professor, 生体材料工学研究所, 助教授 (00220773)
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| Co-Investigator(Kenkyū-buntansha) |
EQUO Kobayashi Tokyo Med.and Dent.Univ., Inst.of Biomaterials and Bioengineering, Research associate, 生体材料工学研究所, 助手 (40242268)
DOI Hisashi Tokyo Med.and Dent.Univ., Inst.of Biomaterials and Bioengineering, Research associate, 生体材料工学研究所, 助手 (30251549)
HAMANAKA Hitoshi Tokyo Med.and Dent.Univ., Inst.of Biomaterials and Bioengineering, Professor, 生体材料工学研究所, 教授 (10013955)
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| Project Period (FY) |
1998 – 2000
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| Project Status |
Completed (Fiscal Year 2000)
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| Budget Amount *help |
¥8,000,000 (Direct Cost: ¥8,000,000)
Fiscal Year 2000: ¥1,400,000 (Direct Cost: ¥1,400,000)
Fiscal Year 1999: ¥1,800,000 (Direct Cost: ¥1,800,000)
Fiscal Year 1998: ¥4,800,000 (Direct Cost: ¥4,800,000)
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| Keywords | Titanium-nickel alloy / Impact test / Hopkinson pressure-bar / Heat treatment / Phase transformation |
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| Research Abstract |
The purpose of this research was to evaluate the impact stress transmission of Ti-Ni alloy for biomedical stress shielding. An impact compression test was carried out with use of split-Hopkinson pressure-bar technique with cylindrical specimens of Ti-Ni alloy, titanium and stainless steel. As a result, the transmitted pulse through Ti-Ni alloy was considerably depressed as compared with those through titanium and stainless steel. The initial stress reduction was large through Ti-Ni alloy and titanium, but the stress reduction through Ti-Ni alloy was much more continuous than titanium. The maximum value in the stress difference betweeen incident and transmitted pulses throgh Ti-Ni alloy or titanium was higher than that through stainless steel, while the stress reduction in the maximum stress through Ti-Ni alloy was statistically larger than that through titanium or stainless steel. Ti-Ni alloy transmitted less impact stress than titanium or stainless steel, which suggested that the loading stress to adjacent tissues could be decreased with use of Ti-Ni alloy as a component material in an implant system. Transformation behavior of the alloy, which is an important factor on the stress transmission, were alos investigated by means of DSC.
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