Biodegradable WE43 Magnesium Alloy Produced by Selective Laser Melting: Mechanical Properties, Corrosion Behavior, and In-Vitro Cytotoxicity

In this work, selective laser melting (SLM) technology was used to prepare Mg-4Y-3Nd-Zr (WE43) alloy. This alloy and production method are promising for the design of biodegradable implants. The aim study investigate chemical composition, microstructure, mechanical properties, corrosion behavior in simulated body fluid (SBF), cytotoxicity produced by SLM compare it with conventionally gravity cast reference Analysis surface revealed an oxygen content 7 wt.%. Undesirable unmelted only partially adhered spherical particles starting powder were also found. microstructure material very fine consisted α-Mg dendritic matrix, β-Mg41(Nd, Y)5 intermetallic phase, Y2O3 inclusions, 0.6 vol.% residual porosity. Vickers hardness, compressive yield strength, maximum strain 88 HV0.1, 201 MPa, 394 14%, respectively, which close values as-cast. vitro rates determined immersion potentiodynamic tests 2.6 mm/year 1.3 mm/year, respectively. Cytotoxicity indicated good biocompatibility 3D-printed