Materials

Army, ASU Collaboration Produces Alloy with Superhero-Like Strength

Researchers from the U.S. Army Research Laboratory and Arizona State University (ASU) have designed a super-strong alloy of copper and tantalum that can withstand extreme impact and temperature. It's likely the closest material on earth to vibranium, a rare, fictitious metallic substance found in Marvel's Wakanda and used in Captain America's shield.

Its structure and deformation response make it a candidate for ballistic impact or protective applications for military vehicles or personal protection for soldiers, said Dr. Kristopher Darling, a materials scientist with ARL's Lightweight and Specialty Metals Branch. Darling said that even beyond the Army, "anywhere there's high strength and good electrical conductivity required, these alloys can be thought of as a model system whose structure can be passed on to other alternative material systems. Materials based on iron or aluminum, for instance, could be used for protection and lethality applications."

Posted in: INSIDER, News, Defense, Materials, Metals, Nanotechnology
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2018 Create the Future Design Contest: Aerospace & Defense Category Winner

DETECTING PLASTIC LANDMINES

Hidden PFM-1 anti-personnel landmines are unexploded ordnance (UXO) devices that pose a difficult challenge to conventional landmine detection methods like metal detecting because the mines are primarily composed of plastic and only weigh 75 g. As a remnant of the Soviet-Afghan War, there are an estimated 10 million such devices scattered throughout Afghanistan. These mines remain in isolated locations, frequently out of reach of de-mining nongovernmental organizations (NGOs) and act to thwart local economic and social development. The PFM-1s are infamously referred to as “toy mines,” as children often mistake the mines for toys and set off the 525 kg of cumulative pressure it takes to detonate them.

Posted in: News, Articles, Aeronautics, Aerospace, Aviation, Batteries, Power Management, Power Supplies, Green Design & Manufacturing, Imaging, Composites, Materials, Metals, Data Acquisition, Detectors, Sensors, Software
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Smart Materials Boost Jet Engine Efficiency and Reduce Noise

A group of new smart materials has the potential to significantly improve the efficiency of jet engines, cutting the cost of flying. The materials, which could also reduce airplane noise over residential areas, have additional applications in a variety of other industries.

The operating temperatures of high-temperature shape memory alloys (HTSMAs) were increased by applying principles from another new class of materials: high-entropy alloys.

Source

Posted in: INSIDER, News, Defense, Composites, Materials
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Unique Chamber Gives Air Force Real-World Corrosion Test Capabilities

Aircraft corrosion is a multi-faceted issue that requires more than a simple, one-dimensional approach. To enable Air Force Research Laboratory (AFRL) personnel to arrive at a complete picture and find out how to best protect valuable military assets, a unique solution was required.

Enter the Accelerated Combined-Effects Simulation test apparatus (ACES). This test chamber, custom-designed under the direction of AFRL through a Small Business Innovative Research effort, allows AFRL researchers to recreate the broad range of simultaneous environmental conditions under which military assets operate, including UV radiation, temperature, humidity, and various gaseous environments. Dynamic fixtures allow for test specimens to be pulled and flexed to further simulate the structural stresses aircraft experience during flight conditions.

Posted in: News, Data Acquisition, Defense, Ceramics, Coatings & Adhesives, Composites, Materials, Metals, Plastics, Research Lab, Data Acquisition, Sensors, Instrumentation, Monitoring, Test & Measurement
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Using Electromagnetic Brakes to Keep Thrust Reversers IN PLACE

Applying reverse thrust redirecting engine power to oppose the direction of travel is a standard technique for decelerating aircraft after touchdown. The approach saves wear on the brakes of the landing gear wheels and reduces stopping distance. Although accidental deployment of the thrust reverser cowl could and did happen, it was assumed for decades that this would only present a hazard in the moments around takeoff and landing. With changes to engine design and aircraft aerodynamics, this assumption no longer held, as demonstrated by the catastrophic loss of Lauda Air Flight 004.

Posted in: Articles, Aeronautics, Aerospace, Power Management, Power Supplies, Materials, Machinery, Mechanical Components, MEMs, Motion Control, Motors & Drives, Positioning Equipment, Power Transmission, Propulsion
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Thermostatic Solutions for Temperature Control Applications

The wax-filled thermostatic element was invented in 1936 by Sergius Vernet (1899-1968). Its principal application was in automotive thermostats used in the engine cooling system. Wax thermostatic elements transform heat energy into mechanical energy using the thermal expansion of waxes when they melt. In addition to engine cooling systems, this wax motor principle also finds applications in heating system thermostatic radiator valves, plumbing, industrial, and agriculture. Today this technology is widely used across a broad spectrum of industries including aerospace & defense, most often for temperature control of various fluid systems.

Posted in: Articles, Aerospace, Defense, Electronic Components, Electronics, Electronics & Computers, Thermal Management, Materials, Metals, Fluid Handling, Joining & Assembly, Machinery, Mechanical Components, MEMs, Data Acquisition, Sensors
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Compact Power Amplifier Solution for Electronic Warfare

Wolfspeed, a Cree company, provides field-tested silicon carbide (SiC) and gallium nitride (GaN) power and RF solutions. As a leader in wide-bandgap semiconductor technology, Wolfspeed partners with designers to build faster, smaller, lighter, and more powerful electronic systems.

Posted in: Articles, Aerospace, Defense, Board-Level Electronics, Power Management, Power Supplies, Materials, Machinery, Mechanical Components, Power, Power Transmission, RF & Microwave Electronics, Semiconductors & ICs
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Burner Rig Testing of A500® C/SiC

There is growing interest in developing, testing, and deploying ceramic-matrix composites (CMCs) into commercial and military aerospace gas turbine engines due to their durability under extreme conditions and weight-savings potential. For military applications, the focus is on the afterburning section of the turbine engine, including the flameholder, augmentor liner, and both the convergent and divergent segments of the exhaust nozzle. These are demanding applications because of the high temperatures and rapid thermal cycles.

Posted in: Briefs, Aerospace, Composites, Materials, Instrumentation, Measuring Instruments, Monitoring, Test & Measurement
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Preventing Premature Part Failures with Electropolishing

Design engineers in the aerospace industry are constantly challenged to improve fit and function of components used in commercial and military aircraft. Parts used in these aircraft must withstand high-stress, corrosive conditions with long-term use. They also must meet highly demanding cycle life specifications.

Posted in: News, News, Aeronautics, Aerospace, Aviation, Government, Consumer Product Manufacturing, Custom & Contract Manufacturing, Manufacturing & Prototyping, Coatings & Adhesives, Materials, Joining & Assembly, Machinery, Mechanical Components
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3 Key Benefits: Better Corrosion Resistance, Fatigue Life, Part Integrity

Electropolishing has become a common metal finishing process used in the aerospace industry to help improve the overall quality of metal components. These components come in many forms including high-performance fasteners, fittings, nozzles, housings, and welded assemblies. In order to maintain reliable performance, these components must be precisely manufactured and have an impeccable surface finish that is free of burrs and other contaminants.

Posted in: News, News, Aeronautics, Aerospace, Aviation, Consumer Product Manufacturing, Custom & Contract Manufacturing, Manufacturing & Prototyping, Coatings & Adhesives, Materials, Metals, Joining & Assembly, Mechanical Components
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