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Effects of thermal aging on the mechanical properties of Ni--Cr--Mo--Fe alloy. [At 1000/sup 0/, 1200/sup 0/, 1400/sup 0/ and 1600/sup 0/F]

Conference ·
OSTI ID:6534615
;
The thermal aging of Ni-Cr-Mo-Fe Alloy (Hastelloy Alloy X) at 1000/sup 0/, 1200/sup 0/, 1400/sup 0/, and 1600/sup 0/F (538/sup 0/, 649/sup 0/, 760/sup 0/, and 871/sup 0/C) for times up to 15,000 h is discussed together with the associated changes in room-temperature impact toughness properties. Effects of 10,000-h aging on room-temperature and elevated-temperature tensile properties, and stress-rupture properties were also evaluated. The alloy exhibits a substantial drop in room-temperature tensile ductility, while elevated-temperature tensile ductility was relatively unaffected by the aging. Stress-rupture properties, while affected by the 1600/sup 0/F (871/sup 0/C) aging, were relatively unaffected by the lower aging temperatures. The correlation between mechanical properties and microstructure is discussed.
Research Organization:
General Atomic Co., San Diego, CA (USA)
DOE Contract Number:
EY-76-C-03-0167-050
OSTI ID:
6534615
Report Number(s):
GA-A-15016; CONF-781202-20
Country of Publication:
United States
Language:
English

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21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS
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36 MATERIALS SCIENCE
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AGING
ALLOYS
CHROMIUM ALLOYS
COBALT ALLOYS
COMPARATIVE EVALUATIONS
CRYSTAL STRUCTURE
DUCTILITY
ELONGATION
EXPANSION
FAILURES
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IMPACT TESTS
IRON ALLOYS
MATERIALS
MATERIALS TESTING
MECHANICAL PROPERTIES
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MICROSTRUCTURE
MOLYBDENUM ALLOYS
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REACTOR MATERIALS
REACTORS
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TEMPERATURE DEPENDENCE
TENSILE PROPERTIES
TESTING
THERMAL EXPANSION
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VERY HIGH TEMPERATURE
YIELD STRENGTH