1991 Volume 40 Issue 454 Pages 901-907
The present paper describes an experimental study on the effect of environment on creep-fatigue strength of a single crystal Ni-base superalloy, CMSX-2. The creep-fatigue tests were carried out in vacuum, air and melted-salt. The creep-fatigue life of CMSX-2 decreased as corrosion environment became severer. This resulted from the difference in surface damage condition among the specimens tested in each environment. The creep-fatigue lives under PP and CC strain waveform conditions seemed to be more sensitive to environment than those under PC and CP conditions, similar to those of polycrystalline austenitic stainless steel.