Stress transmission through Ti-Ni alloy, titanium and stainless steel in impact compression test

Impact stress transmission of Ti-Ni alloy was evaluated for biomedical stre ss 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 titan ium and stainless steel. The initial stress reduction was large through Ti- Ni alloy and titanium, but the stress reduction through Ti-Ni alloy was mor e continuous than titanium. The maximum value in the stress difference betw een incident and transmitted pulses through Ti-Ni alloy or titanium was hig her than that through stainless steel, while the stress reduction in the ma ximum stress through Ti-Ni alloy was statistically larger than that through titanium or stainless steel. Ti-Ni alloy transmitted less impact stress th an 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. (C) 2000 Kluwer Academic Publishers.