Ati Properties, Inc.

John W Foltz, Iv

Aaron L Fosdick

Raul A Martinez-Ayers

Arnel M Fajardo

Gavin Garside

According to one embodiment, an alpha-beta titanium alloy comprises, in weight percentages: an aluminum equivalency in the range of about 6.7 to 10.0; a molybdenum equivalency in the range of 0 to 5.0; at least 2.1 vanadium; 0.3 to 5.0 cobalt; titanium; and incidental impurities.

Titanium alloy

A method for increasing tensile strength of a cold workable alpha-beta titanium alloy comprises solution heat treating a cold workable alpha-beta titanium alloy in a temperature range of T-106&#xb0; C. to T-72.2&#xb0; C. for 15 minutes to 2 hours; cooling the alpha-beta titanium alloy at a cooling rate of at least 3000&#xb0; C./minute; cold working the alpha-beta titanium alloy to impart an effective strain in the range of 5 percent to 35 percent in the alloy; and aging the alpha-beta titanium alloy in a temperature range of T-669&#xb0; C. to T-517&#xb0; C. for 1 to 8 hours. Fastener stock and fasteners including solution treated, quenched, cold worked, and aged alpha-beta titanium alloys are also disclosed.

Processing of alpha-beta titanium alloys

Various enhanced features are provided for centrifugal casting apparatuses, rotatable assemblies, and molds for casting products from molten material. These enhanced features include, among others, tapered gate portions positioned adjacent to the cavities of a mold, extended and shared gating systems, and detachable mold structures for modifying the thermodynamic characteristics and behavior of molds during casting operations.

Enhanced techniques for centrifugal casting of molten materials

An alpha-beta titanium alloy comprises, in weight percentages: an aluminum equivalency in the range of 2.0 to 10.0; a molybdenum equivalency in the range of 0 to 20.0; 0.3 to 5.0 cobalt; and titanium. In certain embodiments, the alpha-beta titanium alloy exhibits a cold working reduction ductility limit of at least 25%, a yield strength of at least 130 KSI (896.3 MPa), and a percent elongation of at least 10%. A method of forming an article comprising the cobalt-containing alpha-beta titanium alloy comprises cold working the cobalt-containing alpha-beta titanium alloy to at least a 25 percent reduction in cross-sectional area. The cobalt-containing alpha-beta titanium alloy does not exhibit substantial cracking during cold working.

Processes for the production of tantalum alloys and niobium are disclosed. The processes use aluminothermic reactions to reduce tantalum pentoxide to tantalum metal or niobium pentoxide to niobium metal.

Processes for producing tantalum alloys and niobium alloys

A method of assembling a centrifugal casting apparatus includes positioning a wedge on a rotatable axis and positioning at least two molds into sealing engagement with the wedge. Each of the at least two molds includes a front face and defines at least two cavities extending from the front face into the mold. A sprue chamber is defined and is structured to receive molten material, and at least a portion of the sprue chamber is defined by at least a portion of the front faces of the at least two molds.

Centrifugal casting method

A centrifugal casting method for producing a casting of a metallic material comprises positioning a rotatable assembly comprising a plurality of gates and a plurality of cavities positioned about a sprue chamber. The plurality of gates and the plurality of cavities are positioned to receive molten metallic material from the sprue chamber in a general direction of centrifugal force. Each of the plurality of gates is coupled to one of the plurality of cavities, and at least two of the plurality of cavities are stacked. The method further comprises rotating the rotatable assembly. The method further comprises delivering a supply of molten metallic material to the sprue chamber.

Processes for the production of tantalum alloys are disclosed. The processes use aluminothermic reactions to reduce tantalum pentoxide to tantalum metal.

Process for producing tantalum alloys

A centrifugal casting apparatus includes a rotatable assembly to rotate about a rotation axis. The rotatable assembly includes a sprue chamber positioned about the rotation axis and is shaped to receive a supply of molten material. A first gate and a second gate are positioned to receive molten material from the sprue chamber in a general direction of centrifugal force. A first cavity and a second cavity are stacked and are respectively positioned to receive molten material from the first gate and the second gate in the general direction of centrifugal force.

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Albany, OR, United States of America

John W Foltz, Iv