Fatigue and creep-fatigue behavior of a nickel-base superalloy at 850 degrees C

Fully reversed total strain-controlled low-cycle fatigue tests with continuously cycling, equal hold in tension and compression, hold in tension or in compression have been conducted at 850 degrees C in air to study fatigue and creep-fatigue behavior of nickel-base alloy GH4049. At higher strain amplitudes, the alloy exhibits cyclic strain hardening followed by softening while a stable cyclic stress response is shown at low strain amplitudes. A...