Life Prediction Techniques for Analyzing Creep-Fatigue Interaction in Advanced Nickel-Base Superalloys.
Abstract
ON THE BASIS OF THE LIMITED DATA THAT ARE PRESENTED IN THIS STUDY, IT MAY BE CONCLUDED THAT THE EFFECT OF CREEP DAMAGE ON THE LOW CYCLE FATIGUE BEHAVIOR OF Rene 95 at 1200 F is not very severe. This is probably because of the good stress rupture properties of the material at this temperature. Strain Range Partitioning approach does not seem to hold much promise for analyzing, and therefore, for predicting strain controlled low cycle fatigue behavior of Rene 95 under creep-fatigue conditions at 1200 F. When compared to the SRP approach, the Frequency Modified approach appears less cumbersome and, hence, more advantageous. The present study indicates, however, that the FM approach using the frequencies calculated on the basis of the actual cycles holds only a slight edge over that involving unmodified inelastic strain range versus cyclic life representation. At present, the damage approach proposed by Ostergren seems to offer more potential as it takes into account the aspect of loop shift that accompanies fatigue cycling of Rene 95.
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 01, 1976
- Accession Number
- ADA038069
Entities
People
- M. N. Menon
Organizations
- Wright State University