A method of forming an article from an α−β titanium including, in weight percentages, from about 2.9 to about 5.0 aluminum, from about 2.0 to about 3.0 vanadium, from about 0.4 to about 2.0 iron, from about 0.2 to about 0.3 oxygen, from about 0.005 to about 0.3 carbon, from about 0.001 to about 0.02 nitrogen, and less than about 0.5 of other elements. The method comprises cold working the α−β titanium alloy.

Processing of titanium-aluminum-vanadium alloys and products made thereby

Methods of refining the grain size of titanium and titanium alloys include thermally managed high strain rate multi-axis forging. A high strain rate adiabatically heats an internal region of the workpiece during forging, and a thermal management system is used to heat an external surface region to the workpiece forging temperature, while the internal region is allowed to cool to the workpiece forging temperature. A further method includes multiple upset and draw forging titanium or a titanium alloy using a strain rate less than is used in conventional open die forging of titanium and titanium alloys. Incremental workpiece rotation and draw forging causes severe plastic deformation and grain refinement in the titanium or titanium alloy forging.

Processing Routes for Titanium and Titanium Alloys

Metastable beta titanium alloys and methods of processing metastable β-titanium alloys are disclosed. For example, certain non-limiting embodiments relate to metastable β-titanium alloys, such as binary β-titanium alloys comprising greater than 10 weight percent molybdenum, having tensile strengths of at least 150 ksi and elongations of at least 12 percent. Other non-limiting embodiments relate to methods of processing metastable β-titanium alloys, and more specifically, methods of processing binary β-titanium alloys comprising greater than 10 weight percent molybdenum, wherein the method comprises hot working and direct aging the metastable β-titanium alloy at a temperature below the β-transus temperature of the metastable β-titanium alloy for a time sufficient to form α-phase precipitates in the metastable β-titanium alloy. Articles of manufacture comprising binary β-titanium alloys according to various non-limiting embodiments disclosed herein are also disclosed.

Metastable beta-titanium alloys and methods of processing the same by direct aging

A heat pipe is produced by forming on a container an outwardly projecting tube portion having an interior in communication with the interior of the container for providing a gas retaining portion, injecting a working liquid into the container through an outer end opening of the tube portion, subsequently closing the end opening of the tube portion to thereby form the gas retaining portion on the container, heating the container to evaporate the working liquid to cause the gas retaining portion to retain therein noncondensable gases within the container, thereafter closing a container opening in communication with the gas retaining portion and separating the gas retaining portion from the container for removal. The weight of the container having the gas retaining portion and the combined weight of the heat pipe obtained and the separated gas retaining portion are measured and compared.

Method of checking whether noncondensable gases remain in heat pipe and process for producing heat pipe

An article of manufacture selected from a titanium alloy fastener and a titanium alloy fastener stock including an alpha/beta titanium alloy comprising, in percent by weight: 3.9 to 4.5 aluminum; 2.2 to 3.0 vanadium; 1.2 to 1.8 iron; 0.24 to 0.3 oxygen; up to 0.08 carbon; up to 0.05 nitrogen; titanium; and up to a total of 0.3 of other elements. In certain embodiments, article of manufacture has an ultimate tensile strength of at least 170 ksi (1,172 MPa) and a double shear strength of at least 103 ksi (710.2 MPa). A method of manufacturing a titanium alloy fastener and a titanium alloy fastener stock comprising the alpha/beta alloy is disclosed.

High strength alpha/beta titanium alloy fasteners and fastener stock

Clad metal plate comprising a layer of cladding metal bonded to a first substrate metal layer is produced by a method comprising initially metallurgically bonding a thin layer of substrate to a thick layer of cladding metal and bonding further layers of substrate metal to the first substrate layer in at least two roll bonding steps wherein the cladding layer is reduced to the desired thickness. The initial metallurgical bonding step may advantageously be a bonding method such as explosive bonding which is free from metal compatibility restrictions encountered in roll-bonding. The method enables a base metal such as carbon steel to be clad economically with a metal, for example titanium, with which it is incompatible for roll-bonding.

Hardwick Roy

Papers

Method for producing clad metal plate

Verfahren zum herstellen einer beschichteten metallplatte.