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Laser Thermography as Non-Destructive Technique to Detect Defects in AlSi10Mg Parts Printed with L-PBF Process

Year: 2025

Type: conference-paper

Abstract: In additive manufacturing (AM), particularly with AlSi10Mg aluminum alloy produced via Laser Powder Bed Fusion (L-PBF), understanding and detecting defects is crucial for ensuring mechanical integrity. This study evaluates the effectiveness of active thermography as a fast, non-destructive testing (NDT) method for identifying typical L-PBF defects. Artificial defects (cubes, spheres, cylinders with unfused powder) were introduced by varying printing parameters. Their real geometry was assessed via micro-computed tomography (μ-CT), revealing deviations from nominal shapes. Thermographic tests using a laser heat source (≈40 W/cm2) were conducted to examine the detectability of these defects in the highly diffusive material AlSi10Mg. Results highlight both the limitations and potential of thermography as a cost- and time-effective alternative to μ-CT for quantitative inspection.

DOI: 10.3390/proceedings2025129008

Authors: Ester D’Accardi, Rainer Krankenhagen, Davide Palumbo, Philipp D. Hirsch, Umberto Galietti

Institutions: Polytechnic University of Bari, Federal Institute For Materials Research and Testing

Language: English

Topic: Thermography and Photoacoustic Techniques

Subfield: Mechanics of Materials

Field: Engineering

Domain: Physical Sciences

SDG: Industry, innovation and infrastructure

Open Access status: gold

OpenAlex ID: W4414261933

FWCI: 5.932

Cites: 5

Cited by: 1

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