| Abstract Scope |
Duplex stainless steels (DSSs) are characterized by two microstructural phases, ferritic (ferromagnetic), and austenitic (paramagnetic), with an excellent mechanical property. Regarding biomedical applications, functionally graded scaffold DSS plays an essential role as lattice structures for damaged bone replacement. The proper pore geometry and complexity of scaffold require additive manufacturing production technique. The scaffold and bulk DSS parts used in this study were fabricated by L-PBF. The surface mechanical properties, including plasticity, elastic modulus, hardness, and the evolution of residual stresses of scaffold DSS were assessed using the nanoindentation test, after analyzing load-displacement data, and the microhardness test. In parallel to the investigation of the mechanical properties, the evolution of the magnetic properties was also examined by using Vibrating Sample Magnetometer and Magnetic Force Microscopy. Moreover, the characterization was also performed after thermal treatment at different annealing temperatures. To infer the microstructural evolution, optical microscopy and scanning electron microscopy were used. |