Creep-fatigue interactions in an austenitic stainless steel
A phenomenological model of the interaction between creep and fatigue in Type 304 stainless steel at elevated temperatures is presented. The model is based on a crack-growth equation and an equation governing cavity growth, expressed in terms of current plastic strain and plastic strain rate. Failure is assumed to occur when a proposed interaction equation is satisfied. Various parameters of the equations can be obtained by correlation with continuously cycling fatigue and monotonic creep-rupture test data, without the use of any hold-time fatigue tests. Effects of various wave shapes such as tensile, compressive, and symmetrical hold on the low-cycle fatigue life can be computed by integrating the damage-rate equations along the appropriate loading path. Microstructural evidence in support of the proposed model is also discussed.
- Research Organization:
- Argonne National Lab., IL (USA)
- DOE Contract Number:
- W-31-109-ENG-38
- OSTI ID:
- 6629093
- Report Number(s):
- CONF-780486-1; TRN: 78-018783
- Resource Relation:
- Conference: 2. conference on temperature and environmental effects on failure, Waterloo, Ontario, Canada, 21 Apr 1978
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
STAINLESS STEEL-304
FATIGUE
AUSTENITIC STEELS
CRACKS
CREEP
HIGH TEMPERATURE
PLASTICITY
RUPTURES
ALLOYS
CHROMIUM ALLOYS
CHROMIUM STEELS
CHROMIUM-NICKEL STEELS
CORROSION RESISTANT ALLOYS
FAILURES
HEAT RESISTANT MATERIALS
HEAT RESISTING ALLOYS
IRON ALLOYS
IRON BASE ALLOYS
MATERIALS
MECHANICAL PROPERTIES
NICKEL ALLOYS
STAINLESS STEELS
STEELS
360103* - Metals & Alloys- Mechanical Properties