Laser beam melting of functionally graded materials with application-adapted tailoring of magnetic and mechanical performance

The processing of functionally graded materials (FGMs) using laser beam melting (LBM) is a promising technique for increasing the efficiency of conventional machine components, especially for e-mobility. Therefore, the aim of the current study is to prove the manufacturability of tailored mechanical...

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Bibliographic Details
Published in:Materials science & engineering. A, Structural materials : properties, microstructure and processing Structural materials : properties, microstructure and processing, 2021-08, Vol.822, p.141662, Article 141662
Main Authors: Andreiev, Anatolii, Hoyer, Kay-Peter, Dula, Dimitri, Hengsbach, Florian, Grydin, Olexandr, Frolov, Yaroslav, Schaper, Mirko
Format: Article
Language:English
Subjects:
Adhesive bonding
Electric motors
Functionally graded material
Functionally gradient materials
Heat treatment
High strength steels
Laser beam melting
Machining
Magnetic properties
Manufacturability
Mechanical properties
Post-processing
Quenched and tempered steel
Rotors
Soft-magnetic iron-silicon alloy
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Summary:The processing of functionally graded materials (FGMs) using laser beam melting (LBM) is a promising technique for increasing the efficiency of conventional machine components, especially for e-mobility. Therefore, the aim of the current study is to prove the manufacturability of tailored mechanical and magnetic properties in a rotor for an electric motor. For this purpose, the design of additively manufactured rotors with application-adapted tailoring of the properties in the same component using FGM was proposed. The first step was to investigate whether the FGM of the components, i.e. soft-magnetic steel for the rotor core and high-strength steel for the rotor shaft ends, are suitable for machining by LBM. Subsequently, multi-material samples of the two investigated steel types with their different arrangement were processed by LBM. Furthermore, post-processing heat treatments and their effects on the microstructure and resulting magnetic properties as well as the mechanical performance of mono- and multi-material samples were analyzed. The combination of LBM and an additional post heat treatment enables both the formation of a good adhesive bond between the two alloys and the desired tailoring of the properties in the FGMs investigated.
ISSN:0921-5093
1873-4936
DOI:10.1016/j.msea.2021.141662