EVALUATIONS OF PLASTIC FATIGUE PROPERTIES OF HEAT-RESISTANT ALLOYS.
Parameters affecting low-cycle fatigue life of AlSl 304, 316, and 348 were investigated. Test parameters were temperature, strain amplitude, strain rate, and length of hold times at peak strain in each cycle. Metallographic and fractographic analysis of 348 and 304 stainless tested at 650 and 816 deg C and strain rates of 4 x 10{sup -3}, 4 x 10{sup -4} and 4 x 10{sup -5} sec{sup -1} showed that the mode of crack initiation was intergranular for all conditions except for the highest strain rate at 650 deg C. At these conditions, the 304 exhibited a transgranular type crack initiated at the highest and lowest strain range evaluated. The 348 exhibited better strain fatigue resistance for a given total axial or plastic strain level. Fatigue resistance at 316 to 650 deg C is less than 304 or 348. The 316 exhibited strain hardening followed by softening over the entire range (F.S.)
- Research Organization:
- General Electric Co., [Cincinnati, Ohio]. Nuclear Materials and Propulsion Operation
- Sponsoring Organization:
- USDOE
- NSA Number:
- NSA-23-006664
- OSTI ID:
- 4823631
- Report Number(s):
- GEMP--1004
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ANNEALING
CRACKS
FATIGUE
HEAT TREATMENTS
LATTICES
MATERIALS TESTING
MATERIALS TESTING
DESTRUCTIVE/equipment calibration and design for fatigue testing heat-resisting metals
N30130* --Metals
Ceramics
& Other Materials--Metals & Alloys--Properties Evaluations
STAINLESS STEEL-304
STAINLESS STEEL-316
STAINLESS STEEL-348
STAINLESS STEEL/fatigue of Types 304 and 348
effects of strain cycle parameters at 650 to 816$sup 0$C on
STAINLESS STEEL/fatigue of Types 316 and 318
effects of strain cycle parameters at 430 to 816$sup 0$C on
STAINLESS STEELS
STRESSES
TEMPERATURE
TENSILE PROPERTIES
CRACKS
FATIGUE
HEAT TREATMENTS
LATTICES
MATERIALS TESTING
MATERIALS TESTING
DESTRUCTIVE/equipment calibration and design for fatigue testing heat-resisting metals
N30130* --Metals
Ceramics
& Other Materials--Metals & Alloys--Properties Evaluations
STAINLESS STEEL-304
STAINLESS STEEL-316
STAINLESS STEEL-348
STAINLESS STEEL/fatigue of Types 304 and 348
effects of strain cycle parameters at 650 to 816$sup 0$C on
STAINLESS STEEL/fatigue of Types 316 and 318
effects of strain cycle parameters at 430 to 816$sup 0$C on
STAINLESS STEELS
STRESSES
TEMPERATURE
TENSILE PROPERTIES