NASA Tech Needs

Structural Detection of Welded Steel Regions

A non-destructive test mechanism is needed to detect fracture toughness, hardness, and microstructure properties of 1/8" steel weld zones. The device must measure the characteristics of flash upset welding of steel. In addition, the standalone technology should not function in a continuous, in-line manufacturing process. The detection system must also identify properties of a welded region, compare these results to both good and bad profiles, and alarm the operator of a specific failure type.

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Pathogen Inactivation Technologies

Although there are highly sensitive methods for pathogen detection in donor blood, the risk of infection via transfusion remains. A customer seeks methods to inactivate all known and unknown blood-borne pathogens in blood products, especially where those technologies can be used for whole blood or red blood cells. A pathogen agent should be able to inactivate multiple infection-agent forms, and a proposed solution must work on all three blood components: red blood cells, plasma, and platelets.

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A More Efficient Turbo Propulsion System

Using higher exhaust exit temperatures, a company needs to improve the efficiency of a turbo propulsion system. Methods should reduce component weight primarily in the core compressor component (or secondarily anywhere in the flow path) through new compressor geometries or aerodynamic improvements. Lower temperatures of components adjacent to the flow path of the exhaust must be maintained. Higher temperatures to the exhaust’s flow path are thus restricted, leading to higher-temperature exhaust and a better maintenance of associated components’ mean-time-between-failures (MTBF).

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Stainless Steel Surface Treatment

A treatment for stainless steel must impart high-release properties on par with non-stick coatings. The method should modify the surface of the stainless steel, but not reduce any of its existing properties, such as abrasion resistance, chemical resistance, or durability. The surface modification must resist sodium hydroxide and bleach (up to 180 °F), alkaline, and acidic staining. The non-stick properties should also offer super-hydrophobic features at a contact angle of 90 degrees or better.

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Materials That Build Viscosity Upon Dilution with Water

A new material needs to maintain a low viscosity when concentrated or anhydrous, and then build viscosity when diluted with water. It should have an approximate concentrated viscosity of less than 500 cps, and a diluted viscosity greater than 1,000 cps when diluted to 50% or more with water. The water-soluble or water-dispersible creation must have low environmental impact and low toxicity. Possible solution areas include colloids, water-soluble polymers, and functional polymers. Previous attempts involved salt-concentrated and salt-sensitive polymers.

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Non-Smoke, Non-Halogenated Fire Retardants

A company needs non-halogenated polymeric mix additives that provide non-smoke fire retardance for wiring jackets and cables. The additive must have low enough loadings so that product performance and flexibility are maintained. Wires and cables must meet a variety of requirements, some imposed by regulatory or testing authorities, and some imposed by market expectations. The additives must produce consistent fire retardance over time and manufacturing runs. The temperature-resistant solution should also be compatible with high-speed production lines.

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Establishing a Network of pFab Innovators

The Fabrication organization at NASA Langley Research Center (LaRC) is in the process of establishing a personal fabrication (pFab) lab for innovators to build quick and economical (plastic) parts and hardware with 3D desktop personal fabricators. The fabricators are low cost and designed to be modifiable and hackable. Recently, several of these economical fabricators were purchased, and upgrades have been made to enhance the performance, including: • Installation of safety cutoff switches to turn off the heater circuit and prevent the cartridge heater from overheating. • Interface board to independently operate the fabricator through an SD card so that a computer is not necessary to build a part. • Installation of an automated heated build platform so that multiple objects can be printed consecutively without a person having to reload the drawing files.

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