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Volume 21, No. 4, May 1992

Headlines

International P/M Community Focuses on San Francisco
U.S. Navy Signs Osprey Process Agreement
Sherritt Offers Fine Cobalt Powders
Eastern Sintered Alloys Accredited
Roll to Receive P/M Pioneer Award
Hennepin Technical College Solicits Students
QMP Moves Sales Office
Climax Research Investigates Welding Procedure for New Alloy
New P/M Particle Sizer
Call For Papers - International P/M Conference in Aerospace, Defense and Demanding Applications
13th Plansee Seminar
Tribology Conference in Russia
New Publications at P/M'92 World Congress
 

ASTRO America Manages U.S. Army Initiative


Hulls are used in the construction of ground vehicles such as Humvees (Courtesy of ASTRO America)

The Applied Science & Technology Research Organization (ASTRO America) will manage the U.S. Army’s effort to build the world’s largest metal 3D printer for ground vehicle production and establish whether a 3D printer can manufacture a Humvee chassis in one build. Known as the ‘Jointless Hull Project’ the effort aims to provide improved production speeds, reduced production costs, reduced vehicle weight, greater vehicle performance and increased survivability.

Advancing Magnesium Additive Manufacturing

The U.S. Army Research Laboratory (ARL) will collaborate with researchers from the University of Central Florida (UCF) to develop additive manufactured lighter weight weapons components for soldiers. The team will optimize the process parameters for the AM of a high-strength magnesium alloy. The lightweight alloy was used to fabricate 24 micro-lattice structures via laser powder bed fusion, allowing the characterization of its compressive strength and failure modes. The expectations are high-strength alloy will eventually be used in future military parts.



Magnesium AM lattice structures by UCF and ARL researchers. (Courtesy of UCF)

Iowa State Improves Precious Metal Recovery


Novel process brings most reactive components to the surface (left) and traps the least reactive components at the core (right). (Courtesy Martin Thuo/Iowa State University)

Inspired by nature’s work to build spiky structures in caves, Iowa State University (ISU) researchers have developed a novel technology capable of recovering precious metals from the alloys in electrical waste, such as old phones, computers, and televisions. University start-up funds and part of a U.S. Department of Energy Small Business Innovation Research grant supported development of the technology.

At relatively low temperatures, oxygen is introduced, slowly moving most reactive surfaces to the surface forming stalagmite-like spikes of metal oxides.  The least-reactive components remain in a purified, liquid core surrounded by brittle metal-oxide spikes “to create a so-called ‘ship-in-a-bottle structure,’” said Martin Thuo, the leader of the research project and an associate professor of materials science and engineering at ISU.

ORNL Additive Manufacturing “Mighty Mo”


ORNL researchers used Electron Beam Powder Bed Fusion to produce crack-free molybdenum, proving its viability for Additive Manufacturing. (Courtesy of ORNL/US Dept of Energy)

Oak Ridge National Laboratory, Oak Ridge, Tennessee, proved molybdenum titanium carbide, a refractory metal alloy that can withstand extreme temperature environments, can also be crack free and dense when produced with electron beam powder bed fusion. Molybdenum (Mo) and other refractory alloys are difficult to process through traditional manufacturing because of their high melting temperature, reactivity with oxygen and brittleness.
 

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