HOMOGENEOUS TITANIUM TUNGSTEN ALLOYS PRODUCED BY POWDER METAL TECHNOLOGY
The present disclosure is related to homogeneous alloys comprising titanium and 9% to less than 20% by weight of tungsten, wherein the alloy has a yield strength of at least 120,000 psi and ductility of least 20% elongation; and with further alloying an ultimate tensile strength of at least 200,000 psi and useful ductility of at least 2% elongation; and with the addition of ceramic particulate reinforcements can exhibit an ultimate tensile strength of at least 180,000 psi. Products and metal matrix composites comprising such homogeneous alloys are also disclosed. The metal matrix composites further comprise a discontinuous reinforcement chosen from TiC, TiB 2 , or TiB, particles or combinations of such particles. Method of making such alloys and composites as well as products made from such alloys and composites are also disclosed.
1 - 23 . (canceled)
24 . An alloy comprising titanium and 9% to less than 20% by weight of tungsten, 4% to 6% by weight of aluminum and 3% to 4% by weight of vanadium, having an ultimate tensile strength of at least 200,000 psi.
25 . The alloy according to claim 24 , wherein the alloy exhibits a ductility of up to about 10% elongation.
26 . The alloy according to claim 25 , wherein the alloy exhibits a ductility ranging from about 1% to about 5% elongation
27 . The alloy according to claim 26 , wherein the tungsten is present in an amount of about 15% by weight.
28 . The alloy according to claim 27 , wherein the alloy exhibits an ultimate tensile strength of about 210,000 psi.
29 . The alloy according to claim 27 , wherein the alloy exhibits a ductility above 2%.
30 . The alloy according to claim 27 , wherein the alloy is consolidated to at least 95% density by at least one of sintering, pressing, and hot isostatic pressing.
31 . A product comprising the alloy according to claim 24 .
32 . A metal matrix composite comprising titanium, 9% to less than 20% by weight of tungsten, 4% to 6% by weight of aluminum and 3% to 4% by weight of vanadium, and 4 to 12% by weight of a discontinuous reinforcement, wherein the metal matrix composite exhibits an ultimate tensile strength of at least 180,000 psi.
33 . The metal matrix composite according to claim 32 , wherein the metal matrix composite exhibits a ductility of up to 10% elongation.
34 . The metal matrix composite according to claim 33 , wherein the discontinuous reinforcement is selected from the group consisting of TiC, TiB2, TiB, and combinations thereof.
35 . The metal matrix composite according to claim 34 , wherein the discontinuous reinforcement is TiC.
36 . The metal matrix composite according to claim 35 , wherein the TiC is present in amount of about 7.5% by weight.
37 . The metal matrix composite according to claim 36 , wherein the metal matrix composite exhibits a Rockwell hardness of about 48 on the C scale.
38 . The metal matrix composite according to claim 36 , wherein the metal matrix composite exhibits an ultimate tensile strength of at least 200,000 psi.
39 . The metal matrix composite of claim 32 , wherein the metal matrix composite is consolidated to at least 95% density by at least one of sintering, pressing, and hot isostatic pressing.
40 . A product comprising the metal matrix composite according to claim 32 .