Optimally variable density lattice to reduce warping thermal distortion of laser powder bed fusion
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36 MATERIALS SCIENCE↗
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Results for “Powder Bed Fusion”
Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
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Defect structure process maps for laser powder bed fusion additive manufacturing
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Sensitivity of laser powder bed fusion additive manufactured HAYNES230 to composition and print parameters
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Laser powder bed fusion additive manufacturing of oxide dispersion strengthened steel using gas atomized reaction synthesis powder
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Heterogeneous sensing and scientific machine learning for quality assurance in laser powder bed fusion – A single-track study
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Predicting mechanical property plateau in laser polymer powder bed fusion additive manufacturing via the critical coalescence ratio
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Experiment-based superposition thermal modeling of laser powder bed fusion
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Microstructural control in metal laser powder bed fusion additive manufacturing using laser beam shaping strategy
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Feedforward control of thermal history in laser powder bed fusion: Toward physics-based optimization of processing parameters
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Detection of keyhole pore formations in laser powder-bed fusion using acoustic process monitoring measurements
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36 MATERIALS SCIENCE↗
Scaleup of Microwave Powder Bed Fusion for Lunar Infrastructure Construction
NASA and its partners are seeking to establish a sustainable and permanent presence on the Moon. Like explorers on Earth, making use of natural resources upon arrival at the destination will be paramount. In-situ resource utilization of the lunar regolith will enable efficient construction of lunar infrastructure. Transforming the granular regolith into a solid can be achieved in many ways. One method is to use microwave energy to sinter the regolith into various structures. The lunar regolith has a low thermal conductivity, but microwaves can volumetrically heat it to bind the granular particles together in an energy efficient manner. One concept that is being developed and evaluated to sinter the regolith into infrastructure uses the Moon’s surface as a powder bed. Regolith would be added to the sintered lunar structure to build up layers to create structures such as landing pads, blast shields, roads, etc. Microwave systems, concept of operations, and sintering protocols are being developed to create a sub-element structure targeted for a lunar demonstration mission.
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ADDITIVE MANUFACTURING OF TITANIUM-ZIRCONIUM-MOLYBDENUM ALLOY USING ELECTRON BEAM POWDER BED FUSION
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22 GENERAL STUDIES OF NUCLEAR REACTORS↗
An additive manufacturing design approach to achieving high strength and ductility in traditionally brittle alloys via laser powder bed fusion
Additive Manufacturing (AM) presents unprecedented opportunities to enable design freedom in parts that are unachievable via conventional manufacturing. However, AM-processed components generally lack the necessary performance metrics for widespread commercial adoption. We present a novel AM processing and design approach using removable heat sink artifacts to tailor the mechanical properties of traditionally low strength and low ductility alloys. The design approach is demonstrated with the Fe-50 at.% Co alloy, as a model material of interest for electromagnetic applications. AM-processed components exhibited unprecedented performance, with a 300 % increase in strength and an order-of-magnitude improvement in ductility relative to conventional wrought material. These results are discussed in the context of product performance, production yield, and manufacturing implications toward enabling the design and processing of high-performance, next-generation components, and alloys.
36 MATERIALS SCIENCE↗