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BORON AND ZIRCONIUM FROM CRUCIBLE REFRACTORIES IN A COMPLEX HEAT-RESISTANT ALLOY

Technical Report ·
OSTI ID:4240614
; ;
The effects of the presence of small amounts of boron and zirconium in a titanium-and-aluminum-hardened nickel-base alloy were studied. Beneficial increases in high-temperature properties of the alloy were obtained by melting in magnesia or zirconia crucibles. Effects similar to those obtained by release of boron and zirconium during crucible-melt reactions were obtained by the intentional additions of boron and zirconium. These additions prolonged the life to fracture and permitted more deformation before fracture. Development of structural changes through the creep process is illustrated by optical and electron photomicrographs. (auth)
Research Organization:
Michigan. Univ., Ann Arbor
NSA Number:
NSA-13-018105
OSTI ID:
4240614
Report Number(s):
NACA-1392
Country of Publication:
United States
Language:
English

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Related Subjects

ADDITIVES
ALUMINUM ALLOYS
BORON
CREEP
CRUCIBLES
DEFORMATION
ELECTRON MICROSCOPY
FAILURES
HARDNESS
IMPURITIES
MAGNESIUM OXIDES
MECHANICAL PROPERTIES
MELTING
METALLURGY AND CERAMICS
NICKEL ALLOYS
TENSILE PROPERTIES
TITANIUM ALLOYS
ZIRCONIUM
ZIRCONIUM OXIDES