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Vanadium-base Alloy.

Keith-GH; Mathews-DR
U S Pat 3 576 621 1971 Apr; :
Although pure vanadium, in the form of sheet rolled to 0.05-In thick at 500 deg. C from 80-g ingots arc-melted from powder compacts under he has at room temperature approximately 100,000 psi tensile strength, 6.1 G/cm3 density, and 5 pct elongation, an alloy similarly fabricated from a powder mixture containing approximately mo 20, ti 10, si 0.5, Y 0.25, and c 0.1 pct had sufficiently higher strength, with 6.25 Density, and about the same ductility and corrosion resistance to be of value as a construction material, especially at 800 deg.-1,000 Deg. C. The ingots were encapsulated in stainless steel for swaging at 1,200 deg c to rods that were rolled at the same temperature to sheets 0.135-In thick before removing the protection by machining, and finished at 500 deg. C to 0.04-0.06-In thickness. The compositions claimed are V 60-80, mo 15- 25, ti 5-15, y 0.1-1, and c 0.05-0.2 pct, with or without 0.2-0.75 pct si. At r.T. The thin sheets with si had 130,000-170,000 psi yield, 160,000-183,000 psi tensile strength, and 1-9 pct elongation; without si these properties were 110,000-147,000, 140,000-163,000, and 3-7 respectively; and for unalloyed V, 92,000, 110,000, and 5 respectively. At 800 deg. C these properties were 65,000-85,000, 85,000-97,000, 20-60; 50,000-60,000, 64,000-73,000, 30-40; 26,000, 30,000, 22 respectively. The penetration by 3n hno3 as measured in 24-h tests at 25-50 deg. C was 1943 mils/yr for the alloy containing si, 1445 for the alloy without si, and 1902 for unalloyed V.
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PAT 3,576,621
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U.S. Pat. 3,576,621; Apr 27, 1971; Chem. Abstr. 75:24,563K