Additive Manufacturing of Co-Ni-Ga High-Temperature Shape Memory Alloy: Processability and Phase Transformation Behavior

Co-Ni-Ga high-temperature shape memory alloy is additively processed by selective laser melting for the first time. Reversible martensitic transformation of the as-built material is proven by differential scanning calorimetry. Microstructural analysis reveals a columnar-grained microstructure resulting from epitaxial solidification. Columnar-grained microstructures are characterized by a very low degree of constraints being beneficial for superior functional performance in numerous shape memory alloys. However, process-induced crack formation remains a challenge towards robust realization of adequate conditions showing good mechanical properties.Fil: Lauhoff, C.. University of Kassel; AlemaniaFil: Fischer, A.. University of Kassel; AlemaniaFil: Sobrero, Cesar Enrique. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Rosario. Instituto de Física de Rosario. Universidad Nacional de Rosario. Instituto de Física de Rosario; ArgentinaFil: Liehr, A.. University of Kassel; AlemaniaFil: Krooß, P.. University of Kassel; AlemaniaFil: Brenne, F.. University of Kassel; Alemania. University of Illinois. Urbana - Champaign; Estados UnidosFil: Richter, J.. University of Kassel; AlemaniaFil: Kahlert, M.. University of Kassel; AlemaniaFil: Böhm, S.. University of Kassel; AlemaniaFil: Niendorf, Thomas. University of Kassel; Alemani