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Aging behavior of alloy 800H and associated mechanical property changes. [538/sup 0/ to 816/sup 0/C]

Technical Report ·
DOI:https://doi.org/10.2172/6061464· OSTI ID:6061464
;

Aging behavior of five different heats of Alloy 800H was investigated in the temperature range 538/sup 0/ to 816/sup 0/C (1000 to 1500/sup 0/F) for times up to 8,000 h. Significant age-hardening was observed at low temperatures (i.e., 538/sup 0/, 593/sup 0/ and 649/sup 0/C (1000/sup 0/, 1100/sup 0/ and 1200/sup 0/F) in most heats. One of the heats, however, exhibited less hardening. Microstructural changes occurring during aging were evaluated by optical metallography, transmission electron microscopy, and x-ray diffraction. Effects of thermal aging on both tensile properties and impact toughness properties were evaluated. The results show that the alloy exhibits good residual impact toughness and tensile ductility after aging up to 8,000 h.

Research Organization:
General Atomic Co., San Diego, CA (USA)
DOE Contract Number:
EY-76-C-03-0167-050
OSTI ID:
6061464
Report Number(s):
GA-A-15194
Country of Publication:
United States
Language:
English

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AGE HARDENING
AGING
ALLOYS
CARBIDES
CARBON COMPOUNDS
CHEMICAL COMPOSITION
CHROMIUM ALLOYS
CRYSTAL STRUCTURE
DATA
DATA FORMS
DUCTILITY
EXPERIMENTAL DATA
GAS COOLED REACTORS
GRAIN BOUNDARIES
GRAPHITE MODERATED REACTORS
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HEAT RESISTANT MATERIALS
HEAT RESISTING ALLOYS
HTGR TYPE REACTORS
INCOLOY 800
INCOLOY ALLOYS
INFORMATION
IRON ALLOYS
IRON BASE ALLOYS
MATERIALS
MECHANICAL PROPERTIES
MICROSTRUCTURE
NICKEL ALLOYS
NUMERICAL DATA
PRECIPITATION
REACTOR MATERIALS
REACTORS
SEPARATION PROCESSES
TABLES
TENSILE PROPERTIES
YIELD STRENGTH