Abdalla Ramadan Nassar

    • 316 Citations
    • 12 h-Index
    20082019
    If you made any changes in Pure, your changes will be visible here soon.

    Research Output 2008 2019

    2019
    12 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

    Heterogeneous sensor-based condition monitoring in directed energy deposition

    Montazeri, M., Nassar, A. R., Stutzman, C. B. & Rao, P., Dec 2019, In : Additive Manufacturing. 30, 100916.

    Research output: Contribution to journalArticle

    Condition monitoring
    3D printers
    Fusion reactions
    Defects
    Sensors

    In-process monitoring of porosity in additive manufacturing using optical emission spectroscopy

    Montazeri, M., Nassar, A. R., Dunbar, A. J. & Rao, P., Jan 1 2019, (Accepted/In press) In : IISE Transactions.

    Research output: Contribution to journalArticle

    3D printers
    Optical emission spectroscopy
    Process monitoring
    Porosity
    Photodetectors
    2018
    15 Citations (Scopus)
    3D printers
    Powders
    Tomography
    Learning systems
    Fusion reactions
    9 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

    Build height control in directed energy deposition using a model-based feed-forward controller

    Wang, Q., Li, J., Nassar, A. R., Reutzel, E. W. & Mitchell, W., Jan 1 2018, Control and Optimization of Connected and Automated Ground Vehicles; Dynamic Systems and Control Education; Dynamics and Control of Renewable Energy Systems; Energy Harvesting; Energy Systems; Estimation and Identification; Intelligent Transportation and Vehicles; Manufacturing; Mechatronics; Modeling and Control of IC Engines and Aftertreatment Systems; Modeling and Control of IC Engines and Powertrain Systems; Modeling and Management of Power Systems. American Society of Mechanical Engineers (ASME), (ASME 2018 Dynamic Systems and Control Conference, DSCC 2018; vol. 2).

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Controllers
    Feedback
    Lasers
    Time measurement
    3D printers
    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
    10 Citations (Scopus)
    Defects
    Sensors
    Powders
    Tomography
    3D printers
    2017
    5 Citations (Scopus)
    Geometry
    3D printers
    Lasers
    Real time control
    Multilayers
    16 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 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
    8 Citations (Scopus)
    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
    22 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
    16 Citations (Scopus)
    Feedback linearization
    Physics
    Geometry
    3D printers
    Temperature
    2016
    1 Citation (Scopus)

    Digital data requirements for powder bed fusion additive manufacturing and the implementation of a transparent communication architecture

    Dunbar, A. J., Nassar, A. R., Reutzel, E. W. & Blecher, J. J., Jan 1 2016, SAMPE Long Beach 2016 Conference and Exhibition. Soc. for the Advancement of Material and Process Engineering, (International SAMPE Technical Conference; vol. 2016-January).

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    3D printers
    Powders
    Fusion reactions
    Communication
    Naproxen
    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
    18 Citations (Scopus)
    3D printers
    Microstructure
    Thermal cycling
    Processing
    Dissolution
    2 Citations (Scopus)

    Reduced-order multivariable modeling and nonlinear control of melt-pool geometry and temperature in directed energy deposition

    Wang, Q., Li, J., Gouge, M., Nassar, A. R., Michaleris, P. & Reutzel, E. W., Jul 28 2016, 2016 American Control Conference, ACC 2016. Institute of Electrical and Electronics Engineers Inc., p. 845-851 7 p. 7525019. (Proceedings of the American Control Conference; vol. 2016-July).

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Geometry
    3D printers
    Temperature
    Lasers
    Parameterization
    7 Citations (Scopus)

    Sensing for directed energy deposition and powder bed fusion additive manufacturing at Penn State University

    Nassar, A. R., Reutzel, E. W., Brown, S. W., Morgan, J. P., Morgan, J. P., Natale, D. J., Tutwiler, R. L., Feck, D. P. & Banks, J. C., Jan 1 2016, Laser 3D Manufacturing III. Pique, A., Gu, B. & Helvajian, H. (eds.). SPIE, 97380R. (Proceedings of SPIE - The International Society for Optical Engineering; vol. 9738).

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    3D printers
    Powder
    Powders
    beds
    Fusion

    Student outcomes of short-term international humanitarian engineering fieldwork

    Nassar, A. R., Holmes, K. & Mehta, K., Nov 28 2016, FIE 2016 - Frontiers in Education 2016: The Crossroads of Engineering and Business. Institute of Electrical and Electronics Engineers Inc., Vol. 2016-November. 7757494

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Students
    engineering
    student
    experience
    Telemedicine
    2015
    15 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
    9 Citations (Scopus)

    A brief survey of sensing for metal-based powder bed fusion additive manufacturing

    Foster, B. K., Reutzel, E. W., Nassar, A. R., Dickman, C. J. & Hall, B. T., Jan 1 2015, Dimensional Optical Metrology and Inspection for Practical Applications IV. Zhang, S., Yoshizawa, T. & Harding, K. G. (eds.). SPIE, 94890B. (Proceedings of SPIE - The International Society for Optical Engineering; vol. 9489).

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    3D printers
    Powder
    Powders
    beds
    Fusion
    11 Citations (Scopus)
    3D printers
    Pulsed lasers
    Laser beams
    pulsed lasers
    hardness
    34 Citations (Scopus)
    3D printers
    Process monitoring
    Control systems
    Metals
    Lasers
    3 Citations (Scopus)

    Chang'aa Culture and Process: Detecting Contamination in a Killer Brew

    Carey, K., Kinney, J., Eckman, M., Nassar, A. & Mehta, K., Jan 1 2015, In : Procedia Engineering. 107, p. 395-402 8 p.

    Research output: Contribution to journalConference article

    Brewing
    Methanol
    Contamination
    Alcohols
    Wages
    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
    2014

    An Interactive Nutritional Guide to develop low-cost healthy meals while sustaining indigenous foods

    Liguori, K., Nassar, A. R. & Mehta, K., Dec 1 2014, Proceedings of the 4th IEEE Global Humanitarian Technology Conference, GHTC 2014. Institute of Electrical and Electronics Engineers Inc., p. 145-151 7 p. 6970274. (Proceedings of the 4th IEEE Global Humanitarian Technology Conference, GHTC 2014).

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Crops
    Costs
    Launching
    Application programs
    Farms
    2 Citations (Scopus)

    Importance of interactive small group discussions to educate community health workers

    Paul, L., Warkulwiz, G., Nassar, A. R. & Mehta, K., Jan 1 2014, In : Procedia Engineering. 78, p. 299-305 7 p.

    Research output: Contribution to journalConference article

    Health
    Developing countries
    Testing
    2013
    15 Citations (Scopus)

    A proposed digital thread for additive manufacturing

    Nassar, A. R. & Reutzel, E. W., Jan 1 2013, p. 19-43. 25 p.

    Research output: Contribution to conferencePaper

    3D printers
    threads
    manufacturing
    XML
    industries
    2 Citations (Scopus)

    Gutter design and selection for roof rainwater catchment systems

    Zankowski, J., Sun, Y., Poon, C., Passauer, E., Nassar, A. & Mehta, K., Jan 1 2013, Proceedings of the 3rd IEEE Global Humanitarian Technology Conference, GHTC 2013. IEEE Computer Society, p. 226-231 6 p. 6713685. (Proceedings of the 3rd IEEE Global Humanitarian Technology Conference, GHTC 2013).

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Catchments
    Roofs
    Water
    Rain
    Water resources
    1 Citation (Scopus)

    The feasibility of rice bags as a low-cost and locally available alternative to greenhouse glazing

    Bement, S. T., Nassar, A. R. & Mehta, K., Jan 1 2013, Proceedings of the 3rd IEEE Global Humanitarian Technology Conference, GHTC 2013. IEEE Computer Society, p. 254-259 6 p. 6713690

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Greenhouses
    Costs
    Spoilage
    Water conservation
    Light transmission
    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

    Generation and characterization of laser sustainted plasmas of argon and AR-C02 mixtures under various flow conditions

    Akarapu, R., Nassar, A. R., Copley, S. M. & Todd Copley, J., Nov 10 2009, 2009 IEEE International Conference on Plasma Science - Abstracts, ICOPS 2009. 5227451

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    laser plasmas
    Argon
    argon
    Plasmas
    Lasers
    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
    2008
    2 Citations (Scopus)

    Characterization of spectral emissions from laser irradiated titanium

    Akarapu, R. K., Dua, P., Campbell, A., Scott, D., Nassar, A. R., Todd Copley, J. & Copley, S., Dec 1 2008, Nitrides and Related Bulk Materials. p. 25-30 6 p. (Materials Research Society Symposium Proceedings; vol. 1040).

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    spectral emission
    Titanium
    titanium nitrides
    titanium
    Titanium nitride