Nickel based alloy composition
AssigneeROLLS-ROYCE plc
InventorsRoger Reed, David Crudden, Babak Raeisinia, Mark Christopher Hardy
Life of this patent
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Abstract
A nickel based alloy composition including, by atomic per cent, between 12 and 15% of elements from the group of aluminium, titanium, tantalum and niobium, between 0.8 and 1.8% tungsten, between 5 and 8% aluminium, at least 28% of elements from the group of molybdenum, tungsten, chromium and cobalt, wherein the atomic ratio of the sum of titanium, tantalum and niobium to aluminium is between 0.6 and 1.1, and wherein the composition includes less than 1.5% molybdenum, the balance being nickel save for incidental impurities.
Claims14
An alloy composition comprising, in atomic percent, between 12 and 17.3% chromium, between 13.7 and 18.3% cobalt, between 0.8 and 1.8% tungsten, between 5.8 and 8.2% aluminium, between 2.7 and 6.2% titanium, between 0.4 and 1.7% tantalum, up to 2.1% niobium, between 0.05 and 0.3% carbon, between 0.05% and 0.25% boron, between 0.02 and 0.06 zirconium, up to 1.5% molybdenum, up to 0.2% hafnium, up to 4% iron, up to 1% silicon and up to 0.65% manganese, the balance being nickel save for incidental impurities;
- wherein the alloy has a γ′ fraction of between about 50% and about 60%.
An alloy composition comprising, in atomic percent, substantially 15.2% chromium, substantially 14% cobalt, substantially 7.1% aluminium, substantially 3.5% titanium, substantially 1.6% tantalum, substantially 0.8% molybdenum, substantially 1.7% tungsten, substantially 1.0% niobium, substantially 0.135% boron, substantially 0.245% carbon, substantially 0.036% zirconium, substantially 1.0% iron, the balance being nickel save for incidental impurities.
An alloy composition comprising, in atomic percent, substantially 14.0% chromium, substantially 15.0% cobalt, substantially 7.0% aluminium, substantially 3.5% titanium, substantially 1.6% tantalum, substantially 1.3% molybdenum, substantially 1.0% tungsten, substantially 0.9% niobium, substantially 0.136% boron, substantially 0.147% carbon, substantially 0.036% zirconium, substantially 1.0% iron, substantially 0.94% silicon, substantially 0.59% manganese the balance being nickel save for incidental impurities.
An alloy composition comprising, in atomic percent, substantially 14.1% chromium, substantially 16.5% cobalt, substantially 7.0% aluminium, substantially 3.5% titanium, substantially 1.6% tantalum, substantially 1.4% molybdenum, substantially 1.1% tungsten, substantially 0.9% niobium, substantially 0.109% boron, substantially 0.147% carbon, substantially 0.058% zirconium, substantially 1.0% iron, substantially 0.53% silicon, substantially 0.59% manganese the balance being nickel save for incidental impurities.
Dependencies are inferred from the claim text.