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Parameter study of an Al–Cr–Mo–Sc–Zr alloy processed by laser powder bed fusion reaching high build rates

  • Market availability of aluminum alloys for laser powder bed fusion (L-PBF) is still highly limited in comparison to conventional manufacturing processes. The demand for high-strength but inexpensive alloys specifically designed for L-PBF is high. This demand has led to research on a variety of adapted conventional alloys which are still limited to utilize the full potential of L-PBF. Scalmalloy® (Al–Mg–Sc–Zr) satisfies the demand for high-strength L-PBF-alloys but needs a high energy input and has troubles with evaporation of Mg. Scancromal® (Al–Cr–Sc–Zr) is a novel alloying system for L-PBF and was first introduced in 2019 with the possibility of higher build rates and comparable strengths to Scalmalloy®. In this paper, a more economic low Sc-containing version of Scancromal® is presented. A parameter study was performed for 100 μm layer thickness reaching high build rates of about 47 cm3 h−1 . Hardness tests for different parameters were carried out and showed a stable process window with a hardness comparable to AlSi10Mg.Market availability of aluminum alloys for laser powder bed fusion (L-PBF) is still highly limited in comparison to conventional manufacturing processes. The demand for high-strength but inexpensive alloys specifically designed for L-PBF is high. This demand has led to research on a variety of adapted conventional alloys which are still limited to utilize the full potential of L-PBF. Scalmalloy® (Al–Mg–Sc–Zr) satisfies the demand for high-strength L-PBF-alloys but needs a high energy input and has troubles with evaporation of Mg. Scancromal® (Al–Cr–Sc–Zr) is a novel alloying system for L-PBF and was first introduced in 2019 with the possibility of higher build rates and comparable strengths to Scalmalloy®. In this paper, a more economic low Sc-containing version of Scancromal® is presented. A parameter study was performed for 100 μm layer thickness reaching high build rates of about 47 cm3 h−1 . Hardness tests for different parameters were carried out and showed a stable process window with a hardness comparable to AlSi10Mg. Additionally, two-dimensional multilayer process simulations showed a potential for increasing the layer thickness to 150 μm and therefore a significant increase in build rate of up to 70 cm3 h−1 highlighting the high productivity potential of Al–Cr alloys for L-PBF.show moreshow less

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Metadaten
Author:Barbara AgricolaORCiD, Claas BierwischORCiD, Frank Palm, Eric A. JägleORCiD, Annegret KerschenlohrORCiD
Language:English
Document Type:Article
Year of first Publication:2024
published in (English):Progress in Additive Manufacturing
Publisher:Springer
Place of publication:Cham
ISSN:2363-9520
ISSN:2363-9512
Pages:12
Review:peer-review
Open Access:ja
Version:published
URN:urn:nbn:de:bvb:573-48567
Related Identifier:https://doi.org/10.1007/s40964-024-00627-8
Faculties / Institutes / Organizations:Fakultät Maschinenbau
Licence (German):License Logo Creative Commons BY 4.0
Release Date:2024/07/08