RELATIONS OF HIGH-TEMPERATURE PROPERTIES OF A Ti + Al HARDENED NICKEL-BASE ALLOY TO CONTAMINATION BY CRUCIBLES

Journal Article · Wed Oct 01 04:00:00 EDT 1958 · Trans. Met. Soc. AIME

OSTI ID:4322121

Decker, R F; Rowe, J P; Freeman, J W

During the course of a study of the influence of melting practlce on the hot-working characteristics and creep-rupture properties of a Ti + Al chnrdened nickelbase alloy, it was found that during vacuum induction melting the major variable was the type of ceramic used for the crucible. Analytical studies of the materials by industrlal concerns indicated that trace amounts of zirconium or boron were derived from the crucibles. This reduced cracking during hot working and increased rup tsre strength and ductility. Heats made in alumina crucibles had poor characteristics. Zirconium derived from zlrconia crucibles improved characteristics. Boron derived during melting from the usual contamination of magnesia wlth borate compounds was more beneficial than zirconium. Equtvalent addition of zirconium or boron to heats made in alumina produced properties comparable to those heats made in zirconia or magnesia. (auth)

• Research Organization: International Nickel Co., Inc.; Univ. of Michigan, Ann Arbor
• NSA Number: NSA-13-002233
• OSTI ID: 4322121
• Journal Information: Trans. Met. Soc. AIME, Journal Name: Trans. Met. Soc. AIME Vol. Vol: 212
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

ALUMINUM ALLOYS
ALUMINUM OXIDES
BORATES
BORON
CERAMICS
CONTAMINATION
CRACKS
CRUCIBLES
DUCTILITY
HIGH TEMPERATURE
HOT WORKING
IMPURITIES
MAGNESIUM OXIDES
MECHANICAL PROPERTIES
MELTING
METALLURGY AND CERAMICS
NICKEL ALLOYS
TENSILE PROPERTIES
TITANIUM ALLOYS
ZIRCONIUM