Disclosed herein are embodiments of mechanically alloyed powder feedstock and methods for spheroidizing them using microwave plasma processing. The spheroidized powder can be used in metal injection molding processes, hot isostatic processing, and additive manufacturing. In some embodiments, mechanical milling, such as ball milling, can be used to prepare high entropy alloys for microwave plasma processing.

A process for manufacturing metal-ceramic composite material powder comprising ball milling metal powder and ceramic nanoparticles to yield a metal-ceramic composite powder comprising ceramic nanoparticles embedded in a metal matrix powder particles; wherein the ball milling is performed using a ceramic milling media and a milling vessel having a ceramic interior surface. Metal matrix nanocomposite powders comprising ceramic nanoparticles imbedded in metal matrix powder particles; wherein the metal matrix powder particles have a spherical shape; wherein there is uniform distribution the ceramic nanoparticles; wherein the nanocomposite powders have good flowability.

The present disclosure provides an aluminum alloy to be used in laminate molding containing Si, Fe, Mn and inevitable impurities, in which α-phase Al—Si—Fe intermetallic compound is present in the aluminum alloy. In addition, a manufacturing method of a laminated molding is provided which laminate molds using powder of this aluminum alloy. Further, a laminate molding of this aluminum alloy is provided.

The invention relates to the field of metallurgy, namely to new heat-resistant aluminum alloys used in additive technologies. The alloy includes nickel, manganese, iron, zirconium, cerium, at least one element selected from the group: copper, magnesium, zinc, and at least one element selected from the group: silicon, calcium, where Ni>Mn+Fe, one or more eutectic phases of the type of Al.sub.3Ni, Al.sub.16Mn.sub.3Ni, Al.sub.9FeNi, which are thermally stable, and dispersoids of the Al.sub.3Zr type, which ensure an ultimate strength of a resulting product of at least 370 MPa. The technical effect is the development of an aluminum material used in the form of a powder, which has good processability when printing and increased strength characteristics at room temperature after printing, without a significant decrease in strength after annealing.

Methods for reducing a concentration of hexavalent chromium within a first aluminum slurry by adding a reducing agent to form a second aluminum slurry are provided. The reducing agent causes a chemical reduction reaction with the hexavalent chromium compound of the first aluminum slurry to form a trivalent chromium compound within the second aluminum slurry such that a first weight ratio of hexavalent chromium to trivalent chromium in the first aluminum slurry is decreased to a second weight ratio of hexavalent chromium to trivalent chromium in the second aluminum slurry, with the second weight ratio being less than the first weight ratio.

A method of manufacturing is provided, including forming a metal frame of a head-mounted computing device shaped as a pair of eyeglasses. Forming the metal frame may include additively manufacturing the metal frame of the head-mounted computing device by performing laser sintering on aluminum powder or titanium powder. Forming the metal frame may further include removing an outer surface of the metal frame via a reductive process.

Disclosed are a method of manufacturing an aluminum-based clad heat sink, and an aluminum-based clad heat sink manufactured by the method. The method includes ball-milling (i) aluminum or aluminum alloy powder and (ii) carbon nanotubes (CNT) to prepare a composite powder, preparing a multi-layered billet using the composite billet, and directly extruding the multi-layered billet using an extrusion die to produce a heat sink. The method has an advantage of producing a light high-strength high-conductivity aluminum-based clad heat sink having an competitive advantage in terms of price by using direct extrusion that is suitable for mass production due to its simplicity in process procedure and equipment required.

A method for manufacturing a foam in a conduit comprises extruding a metal conduit. A metal foam powder is injected into a cavity of the metal conduit. The metal foam powder is activated to form a metal foam in the cavity of the metal conduit. A device for producing a foamed metal comprises an extruder that comprises one or more screws for extruding a metal through a die to form a conduit. The die comprises a plurality of ports for injecting a metal foam powder into a central hollow cavity or a wall cavity of the conduit. The device comprises a pressurizing section for increasing pressure on the metal foam powder and a thermal section for increasing the temperature of the metal foam powder to facilitate its expansion into a metal foam.

The purpose of the present invention is to provide an aluminum alloy molded body that has excellent thermal stability and does not contain a rare earth element, and to provide a production method for the same. More specifically, the present invention provides an aluminum alloy molded body that has a high degree of hardness even at 200° C., and a method which enables efficient production of the same even if the aluminum alloy molded body has a complicated shape. An aluminum alloy laminated molded body according to the present invention, which is molded using an additive manufacturing method, is characterized in that: the raw material therefor is an aluminum alloy material containing 2-10 mass % of a transition metal element that forms a eutectic crystal with Al, with the remainder being Al and unavoidable impurities; the relative density thereof is at least 98.5%; a metal structure is composed of a primary crystal a (Al) and a compound composed of Al and the transition metal element; and the spacing of the compound in a region excluding the boundary of a melt pool is no more than 200 nm.

Refractory-reinforced multiphase high entropy alloys (RHEAs) advantageously providing high strength and fracture toughness in an as-AM deposited condition and other conditions are described.