Abstract:
Creep-fatigue
tests were performed at constant maximum stress in a range of
high alternating stress. On basis of the developed testing
technique for measurement of dynamic back stress, a series of
creep-fatigue resistances are measured at high alternating
stress. The relevent creep-fatigue strain rate equation
expressed by dynamic effective stress is established. The
microstructure observations on TEM explain the influence of high
alternating stress on creep-fatigue resistance and give a deep
understanding of the dependence of creep-fatigue strain rate and
fracture life on the high alternating stress. The deformation
mechanisms according to the observation microstructure on TEM is
consistent with that expected on basis of the stress exponent of
the creep-fatigue strain rate equation.
Key words:
Creep-fatigue Resistance High
alternating stress Fe-Ni-Cr-alloy
Manuscript received on March
10, 1995
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