Development of creep resistant austenitic stainless steels for advanced steam cycle superheater application. [Uses of radiation effects to guide alloy development]
Conference
·
OSTI ID:6298672
The compositions of several 14Cr-16Ni austenitic stainless steels were modified with combinations of minor and residual alloying elements to produce excellent creep strength based on unique precipitate microstructures. These modifications produce fine MC and phosphide precipitates in the matrix for strength and various coarser carbide phases along the grain boundaries for ductility and rupture resistance. Creep-rupture resistance of these modified 14-16 steels is much better than that of type 316 or Inconel 800H and better than that of 17-14CuMo at 700C in the mill-annealed condition. Analysis of microstructure and correlation with creep properties suggests that precipitate effects are primarily responsible for the properties improvement. The ideas and insight for design of the novel precipitate microstructures stem from microcompositional information obtained using state-of-the-art analytical electron microscopy (AEM). 5 refs., 13 figs., 1 tab.
- Research Organization:
- Oak Ridge National Lab., TN (USA)
- DOE Contract Number:
- AC05-84OR21400
- OSTI ID:
- 6298672
- Report Number(s):
- CONF-8705103-9; ON: DE87012929
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
20 FOSSIL-FUELED POWER PLANTS
200101 -- Fossil-Fueled Power Plants-- Cooling & Heat Transfer Equipment & Systems
36 MATERIALS SCIENCE
360103* -- Metals & Alloys-- Mechanical Properties
ALLOYS
AUSTENITIC STEELS
BARYONS
CHEMICAL ANALYSIS
CHROMIUM ALLOYS
CHROMIUM STEELS
CHROMIUM-NICKEL STEELS
CORROSION RESISTANT ALLOYS
CREEP
CRYSTAL STRUCTURE
ELECTRON MICROPROBE ANALYSIS
ELECTRON MICROSCOPY
ELEMENTARY PARTICLES
FERMIONS
FRACTURE PROPERTIES
GRAIN BOUNDARIES
HADRONS
HARDENING
HEAT RESISTANT MATERIALS
HEAT RESISTING ALLOYS
IRON ALLOYS
IRON BASE ALLOYS
MATERIALS
MECHANICAL PROPERTIES
METALLOGRAPHY
MICROANALYSIS
MICROSCOPY
MICROSTRUCTURE
MODIFICATIONS
MOLYBDENUM ALLOYS
NEUTRONS
NICKEL ALLOYS
NUCLEONS
PHASE STUDIES
PHYSICAL RADIATION EFFECTS
PRECIPITATION HARDENING
RADIATION EFFECTS
STAINLESS STEEL-316
STAINLESS STEELS
STEELS
SUPERHEATERS
TIME DEPENDENCE
200101 -- Fossil-Fueled Power Plants-- Cooling & Heat Transfer Equipment & Systems
36 MATERIALS SCIENCE
360103* -- Metals & Alloys-- Mechanical Properties
ALLOYS
AUSTENITIC STEELS
BARYONS
CHEMICAL ANALYSIS
CHROMIUM ALLOYS
CHROMIUM STEELS
CHROMIUM-NICKEL STEELS
CORROSION RESISTANT ALLOYS
CREEP
CRYSTAL STRUCTURE
ELECTRON MICROPROBE ANALYSIS
ELECTRON MICROSCOPY
ELEMENTARY PARTICLES
FERMIONS
FRACTURE PROPERTIES
GRAIN BOUNDARIES
HADRONS
HARDENING
HEAT RESISTANT MATERIALS
HEAT RESISTING ALLOYS
IRON ALLOYS
IRON BASE ALLOYS
MATERIALS
MECHANICAL PROPERTIES
METALLOGRAPHY
MICROANALYSIS
MICROSCOPY
MICROSTRUCTURE
MODIFICATIONS
MOLYBDENUM ALLOYS
NEUTRONS
NICKEL ALLOYS
NUCLEONS
PHASE STUDIES
PHYSICAL RADIATION EFFECTS
PRECIPITATION HARDENING
RADIATION EFFECTS
STAINLESS STEEL-316
STAINLESS STEELS
STEELS
SUPERHEATERS
TIME DEPENDENCE