Abstract
A modified energy approach, Strain Energy-Frequency Separation (SEFS) method, has been developed in the present paper. Compared to this method, Strainrange Partitioning (SRP), Frequency Separation (FS), Frequency-Modified Damage Function (Ostergren M) and Strain Energy Partitioning (SEP) method were applied to predict the time-dependent fatigue lives for GH33A disc and raw material at 700°C, 1Cr18Ni9Ti stainless steel at 600°C. The results showed that SEP has the best predictability and SEFS has better one. The fracture mode of GH33A superalloy at 700°C are found to be as follows, PP type is transgranular fracture mode, PC and CC types are mixed (transgranular and intergranular) fracture mode and CP type is intergranular fracture mode.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
