title: Stress transmission through Ti-Ni alloy, titanium and stainless steel in impact compression test.
abstract: Impact stress transmission of Ti-Ni alloy was evaluated for biomedical stress shielding. Transformation temperatures of the alloy were investigated by means of DSC. 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 more continuous than titanium. The maximum value in the stress difference between incident and transmitted pulses through 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.
authors.affiliation: Department of Metallurgy, Division of Biomaterials, Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University, 2-3-10 Kanda-Surugadai, Chiyoda-ku, Tokyo 101-0062, Japan. yoneyama@i-mde.tmd.ac.jp
authors.forename: T
authors.initials: T
authors.lastname: Yoneyama
authors.forename: H
authors.initials: H
authors.lastname: Doi
authors.forename: E
authors.initials: E
authors.lastname: Kobayashi
authors.forename: H
authors.initials: H
authors.lastname: Hamanaka
authors.forename: Y
authors.initials: Y
authors.lastname: Tanabe
authors.forename: W
authors.initials: W
authors.lastname: Bonfield