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    Use of SWIR Imaging to Monitor Layer-to-Layer Part Quality During SLM of 304L Stainless Steel

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    2018-182-Lough.pdf (616.7Kb)
    Date
    2018
    Author
    Lough, Cody S.
    Wang, Xin
    Smith, Christopher C.
    Adeniji, Olaseni
    Landers, Robert G.
    Bristow, Douglas A.
    Kinzel, Edward C.
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    Abstract
    This paper evaluates using in-situ SWIR imaging to monitor part quality and identify potential defect locations introduced during Selective Laser Melting (SLM) of 304L stainless steel. The microstructure (porosity, grain size, and phase field) and engineering properties (density, modulus, and yield strength) depend on the thermal history during SLM manufacturing. Tensile test specimens have been built with a Renishaw AM250 using varied processing conditions to generate different thermal histories. SWIR imaging data is processed layer-to-layer to extract features in the thermal history for each process condition. The features in the thermal history are correlated with resulting part engineering properties, microstructure, and defects. The use of SWIR imaging is then discussed as a potential for processes monitoring to ensure part quality and develop layer-to-layer control in SLM.
    Department
    Mechanical Engineering
    Subject
    SWIR imaging
    monitoring
    part quality
    defect location
    defects
    304L
    stainless steel
    selective laser melting
    URI
    https://hdl.handle.net/2152/90296
    http://dx.doi.org/10.26153/tsw/17217
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    • 2018 International Solid Freeform Fabrication Symposium

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    © The University of Texas at Austin