EMBEDDING TEMPERATURE SENSORS WITH THE USE OF LASER-FOILPRINTING ADDITIVE MANUFACTURING

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Date

2023

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University of Texas at Austin

Abstract

Laser foil printing (LFP) is a metal additive manufacturing (AM) process using laser-based melting of metal foil technique. Using metal foils in AM has advantages over laser powder-feed processes, allowing for efficient heat transfer and resolving the drawbacks of powder-based AM such as potential powder inhalation health hazards, balling, spattering, and high powder costs. In this study, we demonstrate the advantage of LFP for embedding sensors into structures using 304L stainless-steel foil as the feed material and two different types of temperature sensors. The first type is a resistance temperature detector (RTD) platinum sensor (Pt 100), and the second type is a k-type thermocouple probe. A detailed study of the sensor embedment through LFP revealed that the spot-welding scanning strategy significantly improves the product quality than conventional line-welding scanning strategy. As a result of this study, the feasibility of fabricating functional parts with embedded sensors using the LFP process is demonstrated.

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