Abstract

Fatigue failure is a significant problem in the usage of the metallic biomaterials. Understanding the fatigue characteristics of metallic biomaterials is important for the long-term usage of the implants made of metallic biomaterials. Fatigue strength including fatigue strength level, fatigue strength in vitro and in vivo, notch-fatigue strength, fatigue strength and surface modification, fatigue strength and surface hardening treatment, fatigue strength and bioactive surface modification, improvement in fatigue strength by heat treatment, aging treatment, thermomechanical treatment, deformation-induced transformation of metastable phase, thermochemical treatment, and adding lightweight interstitial element such as oxygen, fatigue crack propagation characteristics including short and long fatigue crack propagation in air and in vitro, improvement in long fatigue crack propagation resistance of metallic biomaterials, and fatigue strength of wire made of new biomedical titanium alloy are described in this chapter.

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