A5048870589- Additive Manufacturing Materials and Processes
- Additive Manufacturing and 3D Printing Technologies
- Welding Techniques and Residual Stresses
- Manufacturing Process and Optimization
- Robot Manipulation and Learning
- High Entropy Alloys Studies
- Metal Forming Simulation Techniques
- Robotic Mechanisms and Dynamics
- Metal Alloys Wear and Properties
- Metallurgy and Material Forming
Oak Ridge National Laboratory
2018-2023
National Transportation Research Center
2018-2020
Metal Big Area Additive Manufacturing (MBAAM) is a novel wire-arc additive manufacturing method that uses correction-based approach developed at the Oak Ridge National Laboratory (ORNL). This an integrated software minimizes dynamic nature of welding and compensates for build height. The MBAAM process used to fabricate simple geometry thin walled specimens, using C-Mn steel weld wire, investigate scatter in mechanical properties correlate them underlying microstructure. uni-axial tensile...
Metal Big Area Additive Manufacturing (MBAAM), an additive manufacturing based on wire-arc process, is progressively evolving from rapid prototyping to the industrial scale production. In MBAAM, height of printed part can easily reach eight feet, and printing last for hours or days. For such large structures, distortion residual stress management are primary challenges in production process. Although transient thermo-mechanical simulations with very small time increments have resulted...
Conventional robotic wire arc additive manufacturing technologies enable the rapid production of moderate-sized components using low-cost feedstocks and welding systems. Efforts to date have primarily focused on single robot solutions. However, new configurations are possible with coordination multiple robots multi-degree freedom positioners. This paper describes a multi-agent control paradigm that enables work collaboratively component rotating platform. The advantages this approach...
This work investigated the linear thermal expansion properties of a multi-material specimen fabricated with Invar M93 and A36 steel. A sequence tests was performed to investigate viability additively manufactured for lowering coefficient (CTE) in part tooling. beads were on steel base plate using fiber laser system, samples taken from steel, Invar, interface between two materials. The CTE measured 40 °C 150 thermomechanical analyzer, elemental composition studied energy dispersive X-ray...
Conventional robotic wire arc additive manufacturing technologies enable the rapid production of moderate-sized components using low-cost feedstocks and components. Efforts to date have primarily focused on single robot solutions. However, new configurations are possible with coordination multiple robots multi-degree freedom positioners. This paper describes a multi-agent control paradigm that enables work collaboratively component rotating platform. The advantages this approach increased...
Metal Big Area Additive Manufacturing (mBAAM) is a promising approach to large-scale metal additive manufacturing (AM) or 3D printing. The mBAAM system uses an arc-based wire-fed welding robot build parts. A multi-degree-of-freedom robotic arm known for its extensive range of motion and reliable tool handling. Attaching torch end-effector gives it capabilities; however, this decreases the dynamics robot. As result, volume printing accuracy are decreased. Additionally, only portion time spent...
This paper explains and analyzes an investigation into the characteristics of Invar, a Nickel-Iron alloy, with regards to deposition through Wire-Arc Additive Manufacturing performed by Metal Big Area (MBAAM) team at Oak Ridge National Laboratory’s Manufacturing Demonstration Facility (MDF). The Invar alloy is extremely valuable multiple fields because its thermal expansion properties. These will attain financial benefits when turning additive manufacturing as future production...