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Meeting

2026 TMS Annual Meeting & Exhibition

Symposium

Late News Poster Session

Presentation Title

F-63: Multi-Wavelength Temperature Measurements of a Titanium Melt Pool in a Wire-Arc Additive Manufacturing Process

Author(s)

Kevin Mullaney, Ralph Peter Tatam

On-Site Speaker (Planned)

Kevin Mullaney

Abstract Scope

Accurate temperature measurement is a key parameter that determines the quality of additive manufactured components in wire-arc deposition processes. Optical pyrometers which are used to provide in-process temperature data require accurate emissivity data of the metal surface. Process-specific emissivity data for metals used in these processes is often not readily available. The use of a compact fibre coupled InGaAs spectrometer as a multi-wavelength pyrometer to measure the temperature of a titanium alloy (Ti-6Al-4V) melt pool, in a wire-arc additive manufacturing process, has been demonstrated for the first time. The temperature measurements are within 5% of the results from a commercial pyrometer when measuring melt pool temperatures of ~ 2172 ⁰C. This technique is ideal for use in deposition processes when data on the metal emissivity is unknown or ambiguous and there is significant interference from arc process light e.g. plasma and/ or laser sources.

Proceedings Inclusion?

Undecided

Keywords

Additive Manufacturing, Process Technology,

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