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United States of America As Represented by the Secretary of the Air Force

Ceracon Gmbh

Ellwood National Forge Company

Morris F Dilmore

Henry S Meeks

Marc S Fleming

James D Ruhlman

Animesh Bose

Alan J Armstrong

A process of making useful shapes by joining of tungsten alloys. Joining of tungsten heavy alloys which are alloys typically made from W&#x2014;Ni&#x2014;Fe is used. These alloys are typically manufactured by liquid phase sintering. This leads to difficulty in producing large length to diameter ratio parts that have some significant weight (such as penetrators). A 'brick and mortar' approach is employed wherein smaller segments of this alloy (low length to diameter ratio) are joined to together to produce a larger part with higher length to diameter ratio.

Joining of tungsten alloys

The present invention relates to a low alloy, low to medium carbon content, high strength, and high ductility steel composition. The present invention contains relatively low nickel content, yet exhibits high performance characteristics and is manufactured at a substantially lower cost than alloy compositions containing high levels of nickel.

Eglin steel&#x2014;a low alloy high strength composition

The method of consolidating a body in any of initially powdered, sintered, fibrous, sponge, or other form capable of compaction, that includes providing flowable pressure transmission particles having carbonaceous and ceramic composition or compositions; heating particles to elevated temperature; locating the heated particles in a bed; positioning the body at the bed, to receive pressure transmission; effecting pressurization of the bed to cause pressure transmission via the particles to the body, thereby to compact and consolidate the body into desired shape, increasing its density, the body consisting essentially of one or more metals selected from the following group: tungsten, rhenium, uranium, tantalum, platinum, copper, gold, hafnium, molybdenum, titanium, zirconium, aluminum, the consolidated body having, along a body dimension, one of the following characteristics: decreasing strength, increasing strength, or decreasing ductility (strain hardening) and increasing ductility (strain hardening).

Metal consolidation process applicable to functionally gradient material (FGM) compositions of tantalum and other materials

A method of consolidating metal powder to form an object that includes pressing the powder into a preform, and preheating the preform to elevated temperature; providing flowable pressure transmitting particles and transmitting microwaves into the particles to heat same, and providing a bed of the flowable and heated pressure transmitting particles; positioning the preform in such relation to the bed that the particles substantially encompass the perform; and pressurizing the bed to compress the particles and cause pressure transmission to the preform, thereby to consolidate the preform into a desired object shape, the powder of step a) consisting essentially of at least two of the following: W, Ni, Fe, Co, manganese and titanium, and preferably at least three of same.

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Baker, FL, United States of America

Morris F Dilmore