Chad Duty

ORCID: 0000-0003-4340-7962
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About
Contact & Profiles
Research Areas
  • Additive Manufacturing and 3D Printing Technologies
  • Manufacturing Process and Optimization
  • Additive Manufacturing Materials and Processes
  • Innovations in Concrete and Construction Materials
  • Injection Molding Process and Properties
  • Chalcogenide Semiconductor Thin Films
  • Quantum Dots Synthesis And Properties
  • Laser Material Processing Techniques
  • Cellular and Composite Structures
  • Diamond and Carbon-based Materials Research
  • Mechanical Behavior of Composites
  • Silicon and Solar Cell Technologies
  • Industrial Vision Systems and Defect Detection
  • High-Temperature Coating Behaviors
  • Laser-induced spectroscopy and plasma
  • 3D Printing in Biomedical Research
  • Bone Tissue Engineering Materials
  • Optical measurement and interference techniques
  • Material Properties and Applications
  • Welding Techniques and Residual Stresses
  • Metal Forming Simulation Techniques
  • Advanced Sensor and Energy Harvesting Materials
  • Nuclear Physics and Applications
  • Polymer Foaming and Composites
  • Thin-Film Transistor Technologies

Oak Ridge National Laboratory
2014-2024

University of Tennessee at Knoxville
2015-2024

Knoxville College
2024

National Transportation Research Center
2014-2019

Phoenix (United States)
2018

National Technical Information Service
2009

Office of Scientific and Technical Information
2009

Manufacturing Institute
2008

Georgia Institute of Technology
2001-2008

Purpose This paper aims to investigate the deposited structure and mechanical performance of printed materials obtained during initial development Big Area Additive Manufacturing (BAAM) system at Oak Ridge National Laboratory. Issues unique large-scale polymer deposition are identified presented reduce learning curve for similar systems. Design/methodology/approach Although BAAM’s individual extruded bead is 10-20× larger (∼9 mm) than typical small-scale systems, overall characteristics...

10.1108/rpj-12-2015-0183 article EN Rapid Prototyping Journal 2017-01-16

The Big Area Additive Manufacturing (BAAM) system can print structures on the order of several meters at high extrusion rates, thereby having potential to significantly impact automotive, aerospace and energy sectors. functional use such parts, however, may be limited by mechanical anisotropy, in which strength printed parts across successive layers build direction (z-direction) lower than corresponding in-plane (x-y directions). This has been primarily attributed poor bonding between since...

10.1016/j.addma.2016.11.008 article EN cc-by-nc-nd Additive manufacturing 2016-12-02

We report a method to fabricate Nd–Fe–B (NdFeB) bonded magnets of complex shape via extrusion-based additive manufacturing (AM), also known as 3D-printing. have successfully formulated 3D-printable epoxy-based ink for direct-write AM with anisotropic MQA NdFeB magnet particles that can be deposited at room temperature. The new feedstocks contain up 40 vol.% particles, and they are shown remain uniformly dispersed in the thermoset matrix throughout deposition process. Ring, bar,...

10.1080/10426914.2016.1221097 article EN Materials and Manufacturing Processes 2016-08-17

Abstract This case study describes how electron-beam melting, a powder bed additive manufacturing technology, helped reduce the cost and material scrap associated with production of Ti-6Al-4V brackets used in hot side engine on Lockheed Martin's Joint Strike Fighter.

10.31399/asm.amp.2013-03.p019 article EN AM&P Technical Articles 2013-03-01

Laser chemical vapour deposition (LCVD) is a new manufacturing process that holds great potential for the production of small and complex metal ceramic parts. Recent research significant to LCVD reviewed, summarising general state knowledge in field, discussing important challenges remain. The basics various techniques, including: photolytic versus pyrolytic fibre growth direct writing methods, are considered. A comprehensive table materials deposited with presented, sorted geometrically...

10.1179/095066001771048727 article EN International Materials Reviews 2001-06-01

Both mid-wave and long-wave IR cameras are used to measure various temperature profiles in thermoplastic parts as they printed. Two significantly different 3D-printers this study. The first is a small scale commercially available Solidoodle 3 printer, which prints with layer thicknesses on the order of 125μm. second printer "Big Area Additive Manufacturing" (BAAM) 3D-printer developed at Oak Ridge National Laboratory. BAAM 4.06 mm. Of particular interest previously deposited new hot about be...

10.1117/12.2053425 article EN Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE 2014-06-12

In this paper, a two-step homogenization method is proposed and implemented for evaluating effective mechanical properties of lattice structured material fabricated by the extrusion additive manufacturing process. order to consider characteristics process in estimation procedures, levels scale are divided into three stages — layer deposition, structural element, structure. The consists two transformations among stages. first step, transformation between deposition element find geometrical...

10.1115/detc2014-34683 article EN 2014-08-17

We are carrying out a multidisciplinary multi-institutional program to develop the scientific and technical basis for inertial fusion energy (IFE) based on laser drivers direct-drive targets. The key components developed as an integrated system, linking science, technology, final application of 1000-MWe pure-fusion power plant. science technologies here flexible enough be applied other size systems. justification this work is family target designs (simulations) that show direct drive has...

10.1109/tps.2009.2037629 article EN IEEE Transactions on Plasma Science 2010-01-20

Abstract Lockheed Martin and Oak Ridge National Laboratory (ORNL) are working on an additive manufacturing (AM) system (Big Area Additive Manufacturing, or BAAM) capable of producing components measured not in terms inches feet, but multiple yards all dimensions. The highly automated has the potential to manufacture parts completely unbounded size.

10.31399/asm.amp.2013-03.p015 article EN AM&P Technical Articles 2013-03-01
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