James A. Demuth
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View article: System and method for large-area pulsed laser melting of metallic powder in a laser powder bed fusion application
System and method for large-area pulsed laser melting of metallic powder in a laser powder bed fusion application Open
The present disclosure relates to systems and methods for performing large area laser powder bed fusion (LBPF) to form a plurality of layers of a 3D part in a layer-by-layer fashion using meltable powder particles. In one implementation th…
View article: Laser pulse shaping for additive manufacturing
Laser pulse shaping for additive manufacturing Open
The present disclosure relates to an apparatus for additively manufacturing a product in a layer-by-layer sequence, wherein the product is formed using powder particles deposited on an interface layer of a substrate. A laser generates firs…
View article: System and method for high power diode based additive manufacturing
System and method for high power diode based additive manufacturing Open
A system is disclosed for performing an Additive Manufacturing (AM) fabrication process on a powdered material forming a substrate. The system may make use of a diode array for generating an optical signal sufficient to melt a powdered mat…
View article: High temperature additive manufacturing print head
High temperature additive manufacturing print head Open
A system of 3D printing using a high temperature 3D print head that functions as a “modified ink jet” printer. The print head has the ability to print high temperature material such as metal, silicon carbide, and other high temperature mat…
View article: Cooler for optics transmitting high intensity light
Cooler for optics transmitting high intensity light Open
A system and an apparatus having an optic and a cooling system for cooling the optic. In one example an optically addressed light valve forms the optic. The cooling system includes first and second windows on opposing surfaces of the optic…
View article: Heat treatment to anneal residual stresses during additive manufacturing
Heat treatment to anneal residual stresses during additive manufacturing Open
An additive manufacturing system having a heat source for melting powder particles in a desired shape and pattern to produce a product. A secondary heat source is used for heat treating the product to achieve heat treatment. The secondary …
View article: System and method for forming material substrate printer
System and method for forming material substrate printer Open
A method is disclosed for manufacturing a part via an additive manufacturing process. A solution is used which has a volatile component within which is suspended particles of a powdered material. The solution is heated until it at least on…
View article: Method for enhanced additive manufacturing
Method for enhanced additive manufacturing Open
Systems and methods are disclosed for manufacturing a three dimensional (3D) part. In one implementation a system in accordance with the present disclosure may make use of an additive manufacturing (AM) subsystem for performing an AM opera…
View article: Physics of large-area pulsed laser powder bed fusion
Physics of large-area pulsed laser powder bed fusion Open
The build rate of powder bed additive manufacturing could be significantly accelerated if consolidation of metal powders evolved from a serial process to a parallel process. In this work, the physics of Large-Area pulsed laser Powder Bed F…
View article: Integrated Chamber Design for the Laser Inertial Fusion Energy (LIFE) Engine
Integrated Chamber Design for the Laser Inertial Fusion Energy (LIFE) Engine Open
The Laser Inertial Fusion Energy (LIFE) concept is being designed to operate as either a pure fusion or hybrid fusion-fission system. A key component of a LIFE engine is the fusion chamber subsystem. The present work details the chamber de…
View article: Diode-based additive manufacturing of metals using an optically-addressable light valve
Diode-based additive manufacturing of metals using an optically-addressable light valve Open
Selective Laser Melting (SLM) of metal powder bed layers, whereby 3D metal objects can be printed from a digital file with unprecedented design flexibility, is spurring manufacturing innovations in medical, automotive, aerospace and textil…
View article: Neutronics and activation analysis of lithium-based ternary alloys in IFE blankets
Neutronics and activation analysis of lithium-based ternary alloys in IFE blankets Open
View article: Fusion Blanket Coolant Section Criteria, Methodology, and Results
Fusion Blanket Coolant Section Criteria, Methodology, and Results Open
The focus of this LDRD was to explore potential Li alloys that would meet the tritium breeding and blanket cooling requirements but with reduced chemical reactivity, while maintaining the other attractive features of pure Li breeder/coolan…
View article: Characterization of tritium breeding ratio and energy multiplication factor of lithium-based ternary alloys in IFE blankets
Characterization of tritium breeding ratio and energy multiplication factor of lithium-based ternary alloys in IFE blankets Open
Lawrence Livermore National Laboratory (LLNL) developed an inertial fusion energy (IFE) chamber concept that uses liquid lithium as the tritium breeder and primary coolant. Lithium metal has multiple benefits including high tritium breedin…