High-temperature creep and fatigue behaviors of AL6XN super austenite steel
- 1. School of Materials Science and Engineering, Shanghai Jiaotong Univ., Shanghai (China)
- 2. Suzhou Nuclear Power Research Inst., Suzhou (China)
Description
High-temperature creep and fatigue behaviors of AL6XN super austenite steel were studied at 650-750 degree C and 120-220 MPa, and 300 degree C and 600 degree C with different strain amplitudes, respectively. The results show that the values of stress exponent and Q for high-temperature creep are estimated to be 5.23 and 327 kJ/mol, respectively. Based on TEM observations, the mechanism of creep was considered as the dislocation climb and glide mode. The stress level of AL6XN steel in the fatigue-test at 600 degree C is larger than that at 300 degree C, and the cycling life decreases obviously with increasing temperature and strain amplitude. TEM observations revealed dislocation tangles, rather than dislocation cells in the steel after the fatigue-test at 600 degree C, and the typical striations on the fracture surfaces without the secondary cracks are observed by SEM, which is related to the dynamic strain aging occurred in the AL6XN austenitic steel. (authors)
Additional details
Publishing Information
- Journal Title
- Atomic Energy Science and Technology
- Journal Volume
- 43
- Journal Issue
- 6
- Journal Page Range
- p. 509-513
- ISSN
- 1000-6931
INIS
- Country of Publication
- China
- Country of Input or Organization
- China
- INIS RN
- 42073277
- Subject category
- S36: MATERIALS SCIENCE;
- Descriptors DEI
- AMPLITUDES; AUGMENTATION; AUSTENITIC STEELS; CRACKS; CREEP; DISLOCATIONS; FATIGUE; FRACTURES; FUEL CANS; MAXIMUM PERMISSIBLE ACTIVITY; PRESSURE RANGE MEGA PA; SCANNING ELECTRON MICROSCOPY; STRAIN AGING; STRAINS; STRESSES; STRIATIONS; SURFACES; TEMPERATURE RANGE 0400-1000 K; TRANSMISSION ELECTRON MICROSCOPY
- Descriptors DEC
- AGING; ALLOYS; CARBON ADDITIONS; CRYSTAL DEFECTS; CRYSTAL STRUCTURE; ELECTRON MICROSCOPY; FAILURES; IRON ALLOYS; IRON BASE ALLOYS; LINE DEFECTS; MECHANICAL PROPERTIES; MICROSCOPY; PRESSURE RANGE; SAFETY STANDARDS; STANDARDS; STEELS; TEMPERATURE RANGE; TRANSITION ELEMENT ALLOYS
Optional Information
- Notes
- 8 figs., 9 refs.