The effects of Cr, Co, Al, Mo and Ta on the cyclic oxidation behavior of a prototype cast Ni-base superalloy based on a 2 sup 5 composite statistically designed experiment

Conference · · TMS (The Metallurgical Society) Paper Selection; (USA)

OSTI ID:5249175

Barrett, C A ^[1]

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1. NASA, Cleveland, OH (USA)

A series of cast Ni-base {gamma}/{gamma}{prime} Superalloys with nominally fixed levels of 1 w/o Ti, 2w/o W, 1 w/o Nb, .10 w/o Zr, .12 w/o C and .01B w/o were systematically varied at selected levels of Co, Cr, Mo, Ta, and Al. The alloy compositions were based on a full 2{sup 5}-fractional statistical design supplemented by 5 x 2 star point alloys and center point alloy. This full composite design of 43 alloys allows a complete second degree (main effect, 2 factor interaction and square terms) estimating equation to be derived from the 5-compositional variables. The elemental levels varied were Mo 0 to 4%, Cr 6 to 18%, Co 0 to 20%, Ta 0 to 8%, and Al 3.25 to 6.25%. The cyclic oxidation resistance was determined from specific weight change data as a function of time for one-hour cycles in static air from 1000 to 1150C. A derived oxidation attack parameter, Ka, was fitted over the alloy sample space.

• OSTI ID: 5249175
• Report Number(s): CONF-840909--
• Conference Information: Journal Name: TMS (The Metallurgical Society) Paper Selection; (USA) Journal Volume: 56
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360105* -- Metals & Alloys-- Corrosion & Erosion
ALLOYS
ALUMINIUM
BORON ADDITIONS
BORON ALLOYS
CARBON ADDITIONS
CHEMICAL REACTIONS
CHROMIUM
COBALT
ELEMENTS
METALLURGICAL EFFECTS
METALS
MOLYBDENUM
NICKEL ALLOYS
NICKEL BASE ALLOYS
NIOBIUM ALLOYS
OXIDATION
TANTALUM
TIME DEPENDENCE
TITANIUM ALLOYS
TRANSITION ELEMENTS
TUNGSTEN ALLOYS
VARIATIONS
WEIGHT
ZIRCONIUM ALLOYS