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• W4372273310 abstract "Additive manufacturing technologies allow the fabrication of complex and bioinspired shapes of magneto-responsive materials which have various applications in soft robotics. The fabrication of these composites with gradients in mechanical properties offers new possibilities in the field of magneto-active materials. However, this usually requires complex multi-material printing steps. Here, a single-step laser powder bed fusion (LPBF) process is presented that enables the local adjustement of the mechanical stiffness of a magneto-active composite. The application of locally different laser parameters, during the processing of a composite consisting of thermoplastic polyurethane and atomized magnetic powder based on hard magnetic Nd-Fe-B, can change the stiffness of the composite from 2 to 22 MPa. Different magneto-responsive actuators, with locally adjusted stiffnesses, are fabricated and their magnetic properties are investigated. The enhanced response of actuators with locally adjusted mechanical properties is demonstrated in comparison to homogenous actuators with the same geometry. As demonstraction for a biomedical application, a locally adjusted stent which can meet requirements for geometry and local stiffness speficially for a individual anatomy and disease is demonstrated. Further implementation of the proposed process in these areas will help to make progress in the integration of soft and rigid components in various applications such as soft robotics and locomotion assistance devices. The presented method shows a roadmap to create functionally graded materials with LPBF, not only in magneto-active materials, but also in various other structural and functional materials." @default.
• W4372273310 created "2023-05-07" @default.
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• W4372273310 date "2023-05-04" @default.
• W4372273310 modified "2023-09-26" @default.
• W4372273310 title "Local stiffness tailoring of magneto-active composites produced by laser powder bed fusion" @default.
• W4372273310 doi "https://doi.org/10.48550/arxiv.2305.02643" @default.
• W4372273310 hasPublicationYear "2023" @default.
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