"In-situ Thermographic Monitoring and Numerical Simulations of Laser-fo" by Tunay Turk, Tao Liu et al.
 

Abstract

Laser-foil-printing (LFP) is an additive manufacturing (AM) technique offering advantages over traditional powder-based methods. A deeper understanding of the melt pool dynamics is crucial for optimizing process parameters and achieving high-quality builds. This paper presents a combined approach utilizing numerical simulations and in-situ thermographic monitoring to investigate the relationship between scanning strategies, melt pool dimensions, and cooling rate in LFP. The numerical simulations are employed to predict melt pool behavior using a time-dependent thermal finite element analysis (FEA). Results demonstrate that the simulations accurately predict melt pool dimensions, showing strong agreement with experimental data. Simultaneously, real-time melt pool dynamics were monitored through in-situ thermographic techniques, with calibration performed using an empirically known melt pool width for emissivity determination. The continuous line scanning strategy resulted in a gradual increase in cooling rates along the scanning path, while the discrete spot scanning strategy maintained stable cooling rates at each weld spot.

Department(s)

Mechanical and Aerospace Engineering

Publication Status

Open Access

Keywords and Phrases

finite element analysis; in situ process monitoring; laser processing; Metal additive manufacturing; sheet feedstock

International Standard Serial Number (ISSN)

1745-2767; 1745-2759

Document Type

Article - Journal

Document Version

Final Version

File Type

text

Language(s)

English

Rights

© 2025 The Authors, All rights reserved.

Publication Date

01 Jan 2025

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