Solvent on granules 3D printing of shape memory alloys

Fe-based shape memory alloys are interesting alternatives to the performant but costly stoichiometric nickel-titanium alloys. Recently, the powder bed fusion additive manufacturing route has been explored for these systems, leading to interesting mechanical performance. However, the literature on sinter-based AM of these systems remains scarce. This work explores the use of pre-alloyed powders to print green parts, followed by debinding and sintering. A variant of binder jetting, which consists in dropping solvent on powder-polymer granule beds, is used to print Fe-Mn-Si test specimens and auxetic parts. The properties of the sintered parts are characterized by differential scanning calorimetry and thermo-mechanical analysis.