Search Results for high-pressure components

A powder metallurgy and hot isostatic pressing technology offers a new way to manufacture high pressure-retaining components for use in the power-generation industry.

This article addresses work to develop core technology for high pressure die casting in order to enable high volume and low-cost manufacturing of lightweight automotive components with complex hollow structural shapes. Although experimental verification of the concept using a part with simplified geometry looks promising, the technique requires further testing using commercial components with internal cavities of complex geometry.

Conventional manufacturing from wrought bar stock typically involves extensive machining, creates significant material waste (scrap metal), and requires numerous steps to obtain the final part geometry. As a more efficient alternative, powder metallurgical (PM) processes are now available to cost effectively fabricate both simple and complex shapes with minimal material waste. Combustion driven higher pressure powder compaction (CDC) for near-net or net shape manufacturing was recently developed. It offers a unique way of forming near-net or net shape high-density powder metal components both cost effectively and at relatively higher compaction pressures than other PM processes.

Vacuum plasma and low pressure plasma spray technologies each provide unique solutions for achieving superior properties in metallic coatings that require low oxide content and high density. Applications include various turbine engine components, as well as biomedical and electronics components.

Aluminum components with refined microstructures produced by high pressure die casting enable manufacturers to gain energy savings via shorter production cycles—if casting and tempering parameters are optimized. This article reports on research results indicating it is possible to increase hardness of hypereutectic Al-Si alloys by optimizing the water quenching rate and duration of room temperature hold, and producing castings with finer microstructures.

4D high-pressure gas quenching ensures uniform heating and quenching for precise, repeatable results while reducing distortion. This article describes the process and equipment for 4D high-pressure gas quenching and gives some examples.

Through rigorous testing and qualification, advanced materials enable major oil companies to operate in ever more extreme environments. Elastomers are being considered due to their flexible and pliant nature, which makes them well suited as sealing components. This article describes work to qualify elastomeric materials for deepwater sealing applications.

This case study reviews the considerations in using magnesium thermal spray surfacing to repair a hydraulic pump pad.

Cold spray is an effective method of depositing a variety of temperature-sensitive materials in specialized applications, such as high-value aerospace component repair. The use of cold spray has seen a significant increase in the repair and restoration of housings for integrated drive generators used in commercial aircraft.

Renewed interest in a NASA-developed material known as Triboglide has led to a study of the friction and wear properties of HVOF-sprayed Triboglide coatings and close variants. This article describes the coating process, examines coating cross-sections, and presents and analyzes the results of high-temperature pin-on-disc wear tests.

Triboglide coatings offer enhanced wear resistance in applications like air foil bearings, actuators, and wear components where oil-based lubrication is scarce. They exhibit excellent wear and friction properties compared to other commercially available coatings.

For parts made by direct metal laser melting, heat treatment is important to set the final microstructure, which impacts mechanical properties.

Field assisted sintering technology (FAST) enables cost-effective manufacturing of metal, ceramic, and composite components with sub-micron grain microstructures and tailored properties.

Advancements in nanoscience are making it possible to metallically glue two solids together at room temperature, in air, and under a small amount of mechanical pressure. Metallic glues can serve as excellent conductors for heat dissipation and electrical current in electronic devices and also as leak-resistant seals for vacuum environments.

Concentrating solar-thermal power with thermal energy storage can provide renewable energy for electricity or industrial processes at any time of day. The U.S. Department of Energy (DOE) has made significant research investments to increase the operating temperature of solar-thermal systems, which increases overall efficiency, but materials science challenges remain to affordably manufacture and commercialize key components.

Nanostructured tungsten-tungsten carbide chemical vapor deposition (CVD) coatings provide a practical, technical, and commercially viable alternative to hard chrome plating for aircraft components.

Advanced materials engineering is being used to solve component life cycle improvement challenges in extremely harsh working conditions. This article discusses examples from various industries where new materials and surface modifications are used to extend the useful life of engineering components and equipment.

Heat shields help protect vehicle-critical components that could delaminate and fail if exposed to high temperatures for any length of time. This article describes a solution that features ceramic platelets applied via plasma spray onto a metal substrate to create a heat shield that adds additional temperature resistance in comparison to standard pressed aluminum versions.

Because residual stress has a significant impact on engine component service life, understanding its cause helps optimize fabrication processes to ensure quality. X-ray diffraction is often the only viable technique to measure residual stresses at certain failure-critical locations. This article gives some guidelines for XRD analysis to understand and control residual stresses in processing of engine components.

This article describes the design and operation of a high-deposition rate plasma nozzle developed for ambient pressure spraying.