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Absorbance study of...
Absorbance study of powder conditions for laser additive manufacturing
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- Brandau, Benedikt (author)
- Luleå tekniska universitet,Produkt- och produktionsutveckling,JENOPTIK Optical Systems GmbH, System Development Advanced Manufacturing, Göschwitzerstraße 25, 07745 Jena, Germany
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- Da Silva, Adrien (author)
- Luleå tekniska universitet,Produkt- och produktionsutveckling
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- Wilsnack, Christoph (author)
- Fraunhofer, Institute for Material and Beam Technology IWS, Winterbergstraße 28, 01277 Dresden, Germany
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- Brueckner, Frank (author)
- Luleå tekniska universitet,Produkt- och produktionsutveckling,Fraunhofer, Institute for Material and Beam Technology IWS, Winterbergstraße 28, 01277 Dresden, Germany
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- Kaplan, Alexander F.H. (author)
- Luleå tekniska universitet,Produkt- och produktionsutveckling
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(creator_code:org_t)
- Elsevier, 2022
- 2022
- English.
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In: Materials & design. - : Elsevier. - 0264-1275 .- 1873-4197. ; 216
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Abstract
Subject headings
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- Absorbance is often used for simulations or validation of process parameters for powder-based laser materials processing. In this work, the absorbance of 39 metal powders for additive manufacturing is determined at 20 laser wavelengths. Different grain sizes and aging states for: steels, aluminum alloys, titanium alloys, Nitinol, high entropy alloy, chromium, copper, brass and iron ore were analyzed. For this purpose, the absorbance spectrum of the powders was determined via a dual-beam spectrometer in the range of λ = 330 - 1560 nm. At the laser wavelengths of λ = 450 nm, 633 nm and 650 nm, the absorbance averaged over all materials was found to increase by a factor of 2.4 up to 3.3 compared to the usual wavelength of λ = 1070 nm, with minimal variations in absorbance between materials. In the investigation of the aged or used powders, a loss of absorbance was detectable. Almost no changes from the point of view of processing aged and new AlSi10Mg powders, is expected for laser sources with λ = 450 nm. The resulting measurements provide a good basis for process parameters for a variety of laser wavelengths and materials, as well as a data set for improved absorbance simulations.
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Materialteknik -- Bearbetnings-, yt- och fogningsteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Materials Engineering -- Manufacturing, Surface and Joining Technology (hsv//eng)
Keyword
- Spectroscopic measurement
- Absorption spectra
- Laser powder bed fusion
- Metal powder
- Multiple reflections
- Laser absorption
- Manufacturing Systems Engineering
- Produktionsutveckling
Publication and Content Type
- ref (subject category)
- art (subject category)
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