This work focusses on microstructure and mechanical properties of FeMnAlNi bulk and micro-lattice structures produced by Laser Powder Bed Fusion, an Additive Manufacturing technology. Microstructure investigation was conducted by means of Electron Back Scattered Electrons analysis, Optical Microscopy and X-Ray Diffraction. The mechanical behavior of the material was evaluated by compression tests and strains were measured by Digital Image Correlation. The material is characterized by coarse grains and by the presence of both austenitic (α-bcc) and martensitic (γ′-fcc) phases. The bulk material recovered an overall and local pseudoelastic strain of 1.3% and 2.9%, respectively. The lattice specimen exhibited ~2% strain recovery.
Pseudoelasticity in FeMnNiAl shape memory alloy lattice structures produced by Laser Powder Bed Fusion
Patriarca L.;Carlucci G.;Belelli F.;Casati R.
2021-01-01
Abstract
This work focusses on microstructure and mechanical properties of FeMnAlNi bulk and micro-lattice structures produced by Laser Powder Bed Fusion, an Additive Manufacturing technology. Microstructure investigation was conducted by means of Electron Back Scattered Electrons analysis, Optical Microscopy and X-Ray Diffraction. The mechanical behavior of the material was evaluated by compression tests and strains were measured by Digital Image Correlation. The material is characterized by coarse grains and by the presence of both austenitic (α-bcc) and martensitic (γ′-fcc) phases. The bulk material recovered an overall and local pseudoelastic strain of 1.3% and 2.9%, respectively. The lattice specimen exhibited ~2% strain recovery.| File | Dimensione | Formato | |
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