Patent ID: 8616851

Claim:
An article, comprising: a first section extending from an outer periphery to a predetermined surface located inward from the outer periphery, wherein the first section comprises a nanostructured ferritic alloy; wherein the nanostructured ferritic alloy comprises from about 5 weight percentage to about 30 weight percentage chromium, from about 0.1 weight percentage to about 2 weight percentage titanium, from about 0 weight percentage to about 5 weight percentage molybdenum, from about 0 weight percentage to about 5 weight percentage tungsten, from about 0 weight percentage to about 5 weight percentage manganese, from about 0 weight percentage to about 5 weight percentage silicon, from about 0 weight percentage to about 2 weight percentage niobium, from about 0 weight percentage to about 2 weight percentage aluminum, from about 0 weight percentage to about 8 weight percentage nickel, from about 0 weight percentage to about 2 weight percentage tantalum, from about 0 weight percentage to about 0.5 weight percentage carbon, and from about 0 weight percentage to about 0.5 weight percentage nitrogen, with the balance weight percentage being iron and incidental impurities; and a number density of at least about 1018 m âˆ’3 nanofeatures comprising titanium oxide and at least one element from an oxide added during formation of the nanostructured ferritic alloy, or from the alloy matrix; and a second section extending from an inner periphery to the predetermined surface located outward from the inner periphery, wherein the second section comprises at least one other alloy different from the nanostructured ferritic alloy.