Bundesanstalt für Materialforschung und -prüfung

Snapshot

Country	Germany
City	Berlin
Tier	Extended
Primary ecosystem	High Temperature
Unit	Division 8.3 Thermographic Methods
Unit	In-situ monitoring in additive manufacturing
Publicly linked people	Tina Walter · Simon J. Altenburg

Why it matters internationally

BAM’s Division 8.3 Thermographic Methods develops contactless thermographic testing, with in-situ monitoring of additive manufacturing as a named work area. It runs SAMMIE, an open-architecture laser powder bed fusion testbed instrumented with thermographic and optical sensors, on which it has demonstrated hyperspectral SWIR measurement of absolute melt-pool temperatures. Its published work treats the unknown, changing emissivity of metal surfaces as the key obstacle to quantitative in-situ thermography, and addresses it with spectral directional emissivity measurements (carried out with CAE Würzburg) and multispectral methods.

Scope of activity

Quantities: absolute melt-pool temperature fields in laser powder bed fusion (hyperspectral SWIR thermography) · spectral directional emissivity of PBF-LB/M surfaces and powders (316L, AlSi10Mg), measured with CAE Würzburg · multispectral optical tomography signals
Spectral range: 0.9–1.7 µm (SWIR hyperspectral line imaging)
Temperature: Melt-pool temperatures of about 1300–2700 K observed in situ (Breese & Altenburg 2025)
Methodology: Hyperspectral SWIR measurement of spectral exitance along a line, converted to absolute temperature with Planck’s law and a spectral emissivity function, on an open-architecture laser powder bed fusion testbed under argon; complemented by multispectral optical tomography and active laser thermography.
Named facilities: SAMMIE — Sensor-based Additive Manufacturing Machine (PBF-LB/M testbed)

Application domains: in-situ monitoring and quality assurance in laser powder bed fusion of metals · in-situ defect detection by active laser thermography · thermographic non-destructive testing.

IR-EMPOWER contributions

IR-EMPOWER 2026: Tina Walter, “Multi- and Hyperspectral Temperature Measurement in the Additive Manufacturing of Metals”

External sources

Traceability

Every claim in this profile traces to the external sources listed above. Profile follows the research-map methodology. Added to the directory: 2026-09-25 (verified against the institution’s public pages or peer-reviewed publications).