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US 2026/0265877 A1Published application
DUCTILE HIGH-TEMPERATURE STRENGTH REFRATORY HIGH-ENTROPY ALLOYS (RHEAs) AND METHODS OF MAKING
AssigneeNational Technology & Engineering Solutions of Sandia, LLC
InventorSalvador B. Rodriguez
Life of this patent
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Abstract
RHEA alloys that have the high-strength/high-temperature of Inconel alloys while retaining the erosion-, corrosion-, and radiation-resistance of RHEA alloys are disclosed. The RHEA alloy includes an element selected Ni, Co and Fe.
Claims20
An alloy, comprising:
- equiatomic amounts of three, four, five or six refractory elements selected from the group consisting of chrome (Cr), molybdenum (Mo), manganese (Mn), niobium (Nb), tantalum (Ta) and titanium (Ti);
- and
- an atomic amount of a non-refractory element selected from the group consisting of nickel, cobalt or iron that is greater than zero and less than or equal to five compared to one of the refractory elements.
An alloy, comprising:
- the formula CrMoMnNbNixTaTi or CrMoNbNixTi, where x is greater than zero and less than or equal to five.
A method of making an article, comprising:
- binder jetting a powder to form a green part by dispersing two or more layers of the powder followed by a layer of a binding agent;
- repeating the dispersal of the powder layers and binding agent layers until the green part of a desired thickness is achieved;
- and
- sintering the green part at a temperature and pressure to remove the binding agent and form the article;
- wherein the powder is formed of a mixture of refractory high-entropy alloy (RHEA) forming elements selected from the group consisting of four to seven elements of chrome (Cr), molybdenum (Mo), manganese (Mn), niobium (Nb), tantalum (Ta) and titanium (Ti) or a ductile RHEA of three to six elements of chrome (Cr), molybdenum (Mo), manganese (Mn), niobium (Nb), tantalum (Ta) and titanium (Ti) and one element selected from the group consisting of iron (Fe), cobalt (Co) and nickel (Ni).
2 more elements
The method of 7, wherein the article has the formula CrMoMnNbNixTaTi or
- CrMoNbNixTi, where x is greater than zero and less than or equal to five.
Dependencies are inferred from the claim text.