Effects of environment on the low-cycle fatigue behavior of Type 304 stainless steel
The low-cycle fatigue behavior of Type 304 stainless steel has been investigated at 593/sup 0/C in a dynamic vacuum of better than 1.3 x 10/sup -6/ Pa (10/sup -8/ torr). The results concerning the effects of strain range, strain rate and tensile hold time on fatigue life are presented and compared with results of similar tests performed in air and sodium environments. Under continuous symmetrical cycling, fatigue life is significantly longer in vacuum than in air; in the low strain range regime, the effect of sodium on fatigue life appears to be similar to that of vacuum. Strain rate (or frequency) strongly influences fatigue life in both air and vacuum. In compressive hold-time tests, the effect of environment on life is similar to that in a continuous-cycling test. However, tensile hold times are nearly as damaging in vacuum as in air. Thus, at least for austenitic stainless steels, the influence of the environment of fatigue life appears to depend on the loading waveshape.
- Research Organization:
- Argonne National Lab., IL (USA)
- DOE Contract Number:
- W-31109-ENG-38
- OSTI ID:
- 5589587
- Report Number(s):
- ANL-79-92
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360103* -- Metals & Alloys-- Mechanical Properties
AIR
ALKALI METALS
ALLOYS
CHROMIUM ALLOYS
CHROMIUM STEELS
CHROMIUM-NICKEL STEELS
CORROSION RESISTANT ALLOYS
CREEP
ELEMENTS
FATIGUE
FLUIDS
GASES
HEAT RESISTANT MATERIALS
HEAT RESISTING ALLOYS
IRON ALLOYS
IRON BASE ALLOYS
MATERIALS
MECHANICAL PROPERTIES
METALLURGICAL EFFECTS
METALS
NICKEL ALLOYS
SODIUM
STAINLESS STEEL-304
STAINLESS STEELS
STEELS
STRAIN RATE
TEMPERATURE EFFECTS
THERMAL CYCLING
ULTRAHIGH VACUUM