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Related Experiment Video

Updated: Dec 5, 2025

Laser-heating and Radiance Spectrometry for the Study of Nuclear Materials in Conditions Simulating a Nuclear Power Plant Accident
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Pyrometric-Based Melt Pool Monitoring Study of CuCr1Zr Processed Using L-PBF.

Katia Artzt1, Martin Siggel2, Jan Kleinert2

  • 1Institute of Materials Research, German Aerospace Center (DLR e.V.; Deutsches Zentrum für Luft-und Raumfahrt), Linder Höhe, D-51147 Cologne, Germany.

Materials (Basel, Switzerland)
|October 21, 2020
PubMed
Summary

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In situ melt pool monitoring (MPM) in Laser Powder Bed Fusion (LPBF) of CuCr1Zr helps identify stable process windows. While MPM intensity doesn't directly correlate with porosity, it effectively detects defects for quality control.

Area of Science:

  • Materials Science
  • Additive Manufacturing
  • Process Monitoring

Background:

  • Laser Powder Bed Fusion (LPBF) is an advanced additive manufacturing technique.
  • In situ melt pool monitoring (MPM) is emerging as a quality assurance tool for LPBF.
  • Understanding process parameters is crucial for optimizing material properties.

Purpose of the Study:

  • Investigate the potential of MPM for parameter development in LPBF of CuCr1Zr.
  • Enhance process understanding and quality control during LPBF.
  • Evaluate the correlation between MPM data and material properties.

Main Methods:

  • Utilized coupon specimens and complex thermomechanical-fatigue (TMF) panels for analysis.
  • Established processing windows at 30 µm and 50 µm layer thicknesses.
Keywords:
copper alloylaser powder bed fusionporosityprocess monitoringselective laser melting

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  • Analyzed variations due to build platform location and part geometry.

    • Main Results:

    • Identified two processing windows for dense CuCr1Zr material.
    • MPM intensity showed no direct correlation with total porosity.
    • MPM response scattering indicated process robustness, particularly concerning balling.
    • MPM successfully detected individual defects in large demonstrator parts.

    Conclusions:

    • MPM is a suitable tool for quality monitoring and non-destructive evaluation in LPBF.
    • MPM data cannot be directly transferred from coupons to components due to geometric influences.
    • MPM aids in identifying stable LPBF parameter windows and detecting defects during fabrication.