Abdalla Ramadan Nassar

    • 285 Citations
    • 11 h-Index
    20082019
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    Research Output 2008 2019

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    Article
    2019
    10 Citations (Scopus)
    Repair
    Porosity
    Mechanical properties
    Microstructure
    Substrates
    1 Citation (Scopus)

    Formation processes for large ejecta and interactions with melt pool formation in powder bed fusion additive manufacturing

    Nassar, A. R., Gundermann, M. A., Reutzel, E. W., Guerrier, P., Krane, M. H. & Weldon, M. J., Dec 1 2019, In : Scientific reports. 9, 1, 5038.

    Research output: Contribution to journalArticle

    Open Access
    Powders
    Particle Size
    Lasers
    Behavior Observation Techniques
    2018
    9 Citations (Scopus)
    3D printers
    Powders
    Tomography
    Learning systems
    Fusion reactions
    5 Citations (Scopus)

    Assessment of optical emission analysis for in-process monitoring of powder bed fusion additive manufacturing

    Dunbar, A. J. & Nassar, A. R., Jan 2 2018, In : Virtual and Physical Prototyping. 13, 1, p. 14-19 6 p.

    Research output: Contribution to journalArticle

    3D printers
    Process Monitoring
    Process monitoring
    Powder
    Fusion
    4 Citations (Scopus)
    Preheating
    Lasers
    Substrates
    Laser cladding
    Stress relaxation
    3 Citations (Scopus)

    Impact of compositional gradients on selectivity of dissolvable support structures for directed energy deposited metals

    Lefky, C. S., Zucker, B., Nassar, A. R., Simpson, T. W. & Hildreth, O. J., Jul 1 2018, In : Acta Materialia. 153, p. 1-7 7 p.

    Research output: Contribution to journalArticle

    Stainless Steel
    Metals
    Stainless steel
    Materials properties
    Corrosion
    7 Citations (Scopus)
    Defects
    Sensors
    Powders
    Tomography
    3D printers
    2017
    5 Citations (Scopus)
    Geometry
    3D printers
    Lasers
    Real time control
    Multilayers
    15 Citations (Scopus)

    Dissolvable Supports in Powder Bed Fusion-Printed Stainless Steel

    Lefky, C. S., Zucker, B., Wright, D., Nassar, A. R., Simpson, T. W. & Hildreth, O. J., Mar 1 2017, In : 3D Printing and Additive Manufacturing. 4, 1, p. 3-11 9 p.

    Research output: Contribution to journalArticle

    Stainless Steel
    Powders
    Fusion reactions
    Stainless steel
    Dissolution
    8 Citations (Scopus)
    Inconel (trademark)
    Fusion reactions
    hardness
    fusion
    Hardness
    6 Citations (Scopus)

    Effect of directed energy deposition processing parameters on laser deposited Inconel® 718: External morphology

    Corbin, D. J., Nassar, A. R., Reutzel, E. W., Beese, A. M. & Kistler, N. A., May 1 2017, In : Journal of Laser Applications. 29, 2, 022001.

    Research output: Contribution to journalArticle

    Inconel (trademark)
    beads
    Profilometry
    Lasers
    Processing
    3 Citations (Scopus)

    Fast authentication of metal additive manufacturing

    Flank, S., Nassar, A. R., Simpson, T. W., Valentine, N. & Elburn, E., Aug 1 2017, In : 3D Printing and Additive Manufacturing. 4, 3, p. 143-147 5 p.

    Research output: Contribution to journalArticle

    3D printers
    Fluorescence spectroscopy
    Authentication
    Metals
    X rays
    20 Citations (Scopus)

    Flaw detection in powder bed fusion using optical imaging

    Abdelrahman, M., Reutzel, E. W., Nassar, A. R. & Starr, T. L., May 1 2017, In : Additive Manufacturing. 15, p. 1-11 11 p.

    Research output: Contribution to journalArticle

    Powders
    Fusion reactions
    Imaging techniques
    Defects
    Scanning
    15 Citations (Scopus)
    Feedback linearization
    Physics
    Geometry
    3D printers
    Temperature
    2016
    17 Citations (Scopus)

    Dissolvable metal supports for 3D direct metal printing

    Hildreth, O. J., Nassar, A. R., Chasse, K. R. & Simpson, T. W., Jun 1 2016, In : 3D Printing and Additive Manufacturing. 3, 2, p. 91-97 7 p.

    Research output: Contribution to journalArticle

    3D printers
    Printing
    Metals
    Machining
    Electrochemical etching
    14 Citations (Scopus)
    3D printers
    Microstructure
    Thermal cycling
    Processing
    Dissolution
    2015
    14 Citations (Scopus)

    3D spatial reconstruction of thermal characteristics in directed energy deposition through optical thermal imaging

    Kriczky, D. A., Irwin, J., Reutzel, E. W., Michaleris, P., Nassar, A. R. & Craig, J., Jul 1 2015, In : Journal of Materials Processing Technology. 221, p. 172-186 15 p.

    Research output: Contribution to journalArticle

    Infrared imaging
    3D printers
    Microstructure
    Hot Temperature
    Process monitoring
    11 Citations (Scopus)
    3D printers
    Pulsed lasers
    Laser beams
    pulsed lasers
    hardness
    30 Citations (Scopus)

    Intra-layer closed-loop control of build plan during directed energy additive manufacturing of Ti-6Al-4V

    Nassar, A. R., Keist, J. S., Reutzel, E. W. & Spurgeon, T. J., Apr 1 2015, In : Additive Manufacturing. 6, p. 39-52 14 p.

    Research output: Contribution to journalArticle

    3D printers
    Hatches
    Microhardness
    Temperature
    Mechanical properties
    2012
    12 Citations (Scopus)

    Investigations of laser-sustained plasma and its role in laser nitriding of titanium

    Nassar, A. R., Akarapu, R., Copley, S. M. & Todd Copley, J., May 9 2012, In : Journal of Physics D: Applied Physics. 45, 18, 185401.

    Research output: Contribution to journalArticle

    nitriding
    Nitriding
    Titanium
    titanium
    Plasmas
    2009
    3 Citations (Scopus)

    Numerical model of a laser-sustained argon plasma

    Akarapu, R., Nassar, A. R., Copley, S. M. & Todd Copley, J., Dec 1 2009, In : Journal of Laser Applications. 21, 4, p. 169-175 7 p.

    Research output: Contribution to journalArticle

    Argon lasers
    argon plasma
    Numerical models
    Flow velocity
    Plasmas