Dresden 2026 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 13: Magnetic Heuslers and Semiconductors
MA 13.4: Vortrag
Montag, 9. März 2026, 15:45–16:00, POT/0361
Microstructure Design via Additive Manufacturing of Heusler Alloys for Multicaloric Applications — •Nene Narh Teinor1,2, Adrian Guder3, Johannes Puy1, Christian Lauhoff3, Thomas Niendorf3, Oliver Gutfleisch1, and Franziska Scheibel1,2 — 1Institute of Materials Science, Technical University of Darmstadt, Germany — 2Additive Manufacturing Center, Technical University of Darmstadt, Darmstadt, Germany — 3Institute of Materials Engineering, University of Kassel, Germany
Heusler alloys like NiMnSn and NiCoMnTi show strong potential for solid-state cooling due to their first-order magnetostructural transitions (FOMST). However, their functional performance is highly sensitive to processing conditions. In this work, bulk samples are produced via Laser Powder Bed Fusion (PBF-LB/M) using gas-atomized powders to explore the influence of additive manufacturing parameters on microstructure and caloric properties. By varying laser power, scan speed, and strategy, we achieve controlled tuning of martensitic, austenitic, and Curie temperatures, as well as reduced thermal hysteresis. Structural, compositional, and magnetic analyses reveal how rapid solidification enhances the sharpness and reversibility of FOMST. We demonstrate that additive manufacturing not only preserves the functional properties of these alloys but also enables active enhancement of their tunability of transition behavior compared to conventionally processed samples. We acknowledge Deutsche Forschungsgemeinschaft (DFG) support through the CRC/TRR 270 (Project ID 405553726)
Keywords: Multicalorics; Heusler Alloys; Laser Powder Bed Fusion; Transition Temperature Tuning