A5079229085- Additive Manufacturing Materials and Processes
- High Entropy Alloys Studies
- Additive Manufacturing and 3D Printing Technologies
- Metallic Glasses and Amorphous Alloys
- Advanced ceramic materials synthesis
- Advanced materials and composites
- Titanium Alloys Microstructure and Properties
- Planetary Science and Exploration
- Glass properties and applications
- Spacecraft and Cryogenic Technologies
- Intermetallics and Advanced Alloy Properties
- Space Exploration and Technology
- Technology Assessment and Management
- Nuclear materials and radiation effects
- Welding Techniques and Residual Stresses
- Advanced Optical Sensing Technologies
- Metal Forming Simulation Techniques
- Magnetic Properties of Alloys
- Spacecraft Design and Technology
- Metallurgy and Material Forming
- Material Properties and Applications
- Manufacturing Process and Optimization
- Bone Tissue Engineering Materials
- Micro and Nano Robotics
- Vibration Control and Rheological Fluids
Jet Propulsion Laboratory
2015-2024
Sandia National Laboratories
2024
Government of the United States of America
2023
California Institute of Technology
2013-2021
Pasadena City College
2017
University of California, Irvine
2006-2015
Interest in additive manufacturing (AM) has dramatically expanded the last several years, owing to paradigm shift that process provides over conventional manufacturing. Although vast majority of recent work AM focused on three-dimensional printing polymers, techniques for fabricating metal alloys have been available more than a decade. Here, laser deposition (LD) is used fabricate multifunctional strategically graded composition alter their mechanical and physical properties. Using technique...
Over the 2010s technological improvements allowed metal additive manufacturing to graduate from a prototyping tool widespread, full-scale process. Among capabilities still under development, however, is ability locally tailor alloy composition and properties fabricate bulk, complex geometry functionally graded materials (FGMs), eliminating need for dissimilar-metal welds joints. The challenge of compositional grading involves overcoming chemical, metallurgical, thermal property differences...
Although soft robotics promises a new generation of robust, versatile machines capable complex functions and seamless integration with biology, the fabrication such soft, three dimensional (3D) hierarchical structures remains significant challenge. Stereolithography (SLA) is an additive manufacturing technique that can rapidly fabricate device architectures required for next these systems. Current SLA materials processes are prohibitively expensive, display little elastic deformation at room...
Additive manufacturing can provide many advantages to the future of space flight. Although it has been in use for plastic prototyping applications, is only more recently that additive technologies have investigated produce metal and ceramic flight parts. This review paper presents some specific issues arise including materials selection, processing postprocessing parameters, qualification process. With these concerns mind, there are seven main applications which a benefit. These include...
Abstract The use of bulk metallic glasses (BMGs) as the flexspline in strain wave gears (SWGs), also known harmonic drives, is presented. SWGs are unique, ultra-precision gearboxes that function through elastic flexing a thin-walled cup, called flexspline. current research demonstrates BMGs can be cast at extremely low cost relative to machining and implemented into an alternative steel. This approach may significantly reduce SWGs, enabling lower-cost robotics. attractive properties BMGs,...
Joining of dissimilar metals is required for numerous applications in industries such as chemical, energy and automotive. It challenging due to differences melting point, density, thermal expansion the being joined. Common welding techniques involve limiting solidification a narrow area leading high stresses potentially brittle intermetallic phases. Furthermore, geometric complexity these welded joints can be rather limited. Additive Manufacturing (AM) presents new joining metals. One...
Abstract The threat of micro‐meteoroid and orbital debris (MMOD) collisions with spacecraft satellites has been increasing the worldwide use low earth orbit. Providing low‐areal‐density shielding for mitigation these high velocity impacts is essential ensuring successful cost effective missions. Here, we report results obtained from hypervelocity impact testing on bulk metallic glass (BMG) matrix composites. Their carbide‐like hardness, melting temperatures, ultra‐high strength‐to‐weight...
The microstructure and magnetic performance of Fe49Co2V (Hiperco50) manufactured via laser‐directed energy deposition are determined. In the as‐printed form, material displays a fine, equiaxed magnetically “hard” behavior. With customized post‐process annealing treatment, significant grain growth occurs, resulting in soft comparable to traditionally materials. An inverse correlation between laser power post‐anneal size is observed, with lower powers samples larger sizes after annealing....
Producing soft magnetic alloys by additive manufacturing has the potential to overcome cracking and brittle fracture issues associated with conventional thermomechanical processing. Fe–Co exhibit high saturation but low ductility that makes them difficult process commercial methods. Ni–Fe have good permeability in comparison Fe–Co, they suffer from saturation. Functional grading between through blown powder directed energy deposition can produce materials combine enhance properties beyond...
Additive manufacturing has ushered in a new paradigm of bottom-up materials-by-design spatially non-uniform materials. Functionally graded materials have locally tailored compositions to provide optimized global properties and performance. In this letter, we propose an opportunity for the application magnetic as lens elements charged particle optics. A Hiperco50/Hymu80 (FeCo-2 V/Fe-80Ni-5Mo) alloy was successfully additively manufactured via Laser Directed Energy Deposition with varying...
Reliability and lifetime of diode lasers is critical to space missions. Rigorous tests were conducted on qualify them be deployed the Nuclear Spectroscopic Telescope Array (NuSTAR) mission. This mission includes a metrology system that based upon 2 laser diodes. paper discusses different failure mechanisms can arise, as well reliability requirements set forth by NuSTAR In addition, qualification procedures results 120 diodes from two vendors will presented. Also, an accelerated test 20...