Nickel-base superalloys and articles formed therefrom
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United States of America Patent
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Mar 11, 2003
Grant Date -
Feb 20, 2003
app pub date -
Apr 24, 2001
filing date -
Apr 24, 2001
priority date (Note) -
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Abstract
An article, such as a turbine engine component, formed from a nickel-base superalloy, the nickel-base superalloy containing a .gamma.' tetragonal phase and comprising aluminum, titanium, tantalum, niobium, chromium, molybdenum, and the balance nickel, wherein the article has a time dependent crack propagation resistance of at least about 20 hours to failure at about 1100.degree. F. in the presence of steam. The invention also includes a nickel-base superalloy for forming such and article and methods of forming the article and making the nickel-base superalloy.
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