C - Chemistry – Metallurgy – 22 – C
Patent
C - Chemistry, Metallurgy
22
C
C22C 27/02 (2006.01) C22C 30/00 (2006.01) C22C 49/00 (2006.01)
Patent
CA 2105189
CLAD STRCUTURAL MEMBER WITH NbTiAlCr Hf ALLOY CLADDING AND NIOBIUM BAS METAL CORE ABSTRACT OF THE DISCLOSURE Composite structures having a higher density, stronger reinforcing niobium based alloy embedded within a lower density, lower strength niobium based cladding alloy are provided. The cladding is preferably an alloy having a niobium and titanium base according to the expression: Nb-Ti27-40.5-Al4.5-10.5-Hf1.5-5.5V0-6Cr4.5-8.5Zr0-1C0-0.5, where each metal of the metal/metal composite has a body centered cubic crystal structure, and wherein the ratio of concentrations of Ti to Nb (Ti/Nb) is greater than or equal (?) to 0.5, and wherein the maximum concentration of the Hf+V+Al+Cr additives is less than or equal (?) to the expression: 16.5 + 5 x Ti/Nb . The reinforcement may be in the form of plates, sheets or rods of the higher strength, higher temperature niobium based reinforcing alloy. The same crystal form is present in both the matrix and the reinforcement and is specifically body centered cubic crystal form.
Benz Mark Gilbert
Hughes John Raymond
Jackson Melvin Robert
Company General Electric
Craig Wilson And Company
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