抄録
In this paper, ultrasonic fatigue testing results of various materials is briefly reviewed. The emphasis is focused upon the rapidness and effectiveness of ultrasonic fatigue testing which enable screening tests for structural materials such as steam turbine blade materials. It is also exemplified that the ⊿K_<th> can be easily measured at the very slow da/dN between (10)^<-8>∿(10)^<-14>m/cycle. Long term fatigue and corrosion fatigue behavior of structural materials can be investigated by use of ultrasonic fatigue testing. The generation of heat in specimen and frequency effect are also discussed. Finally a couple of future problems to be solved are touched in brief.
