Functionally Graded NiTi Shape Memory Alloy: Selective Laser Melting Fabrication and Multi-Scale Characterization

Besides the possibility of fabricating complex geometries, a major advantage of additive manufacturing is tailoring the microstructure and consequently properties of the parts. By changing the process parameters (PPs). Functionally graded systems can be achieved without the need for post-processing or joining. In this study, fabrication of a functionally graded NiTi using selective laser melting was investigated. Using two different sets of PPs resulted in a part with two different functional properties. Several characterization methods were employed to study microstructural distribution. Thermomechanical full-field strain tests showed a novel behavior, a combination of superelastic and shape memory effects at room temperature. (c) 2021 Elsevier B.V. All rights reserved.