Complex Corrosion Properties of AISI 316L Steel Prepared by 3D Printing Technology for Possible Implant Applications

Abstract

This paper deals with the investigation of complex corrosion properties of 3D printed AISI 316L steel and the influence of additional heat treatment on the resulting corrosion and mechanical parameters. There was an isotonic solution used for the simulation of the human body and a diluted sulfuric acid solution for the study of intergranular corrosion damage of the tested samples. There were significant microstructural changes found for each type of heat treatment at 650 and 1050 °C, which resulted in different corrosion properties of the tested samples. There were changes of corrosion potential, corrosion rate and polarization resistance found by the potentiodynamic polarization method. With regard to these results, the most appropriate heat treatment can be applied to applications with intended use in medicine.

Analysis of Welded Joint Properties on an AISI316L Stainless Steel Tube Manufactured by SLM Technology

“…Prior to any treatment, all samples were first heat-treated in a Clasic O816 VAK (Clasic CZ, Řevnice, Czech Republic) vacuum furnace. Annealing was applied to reduce the internal stress to 550 °C with a temperature hold of 360 min and cooling in a furnace for 12 h under vacuum [ 29 , 30 ]. After heat treatment, the end welds of the tubes were adapted for welding by chamfering the edges at an angle of 45° (see Figure 2 ) and stitching was performed followed by welding.…”

Hot Deformation Treatment of Grain-Modified Mg–Li Alloy

“…The calculated value was lower than those of the rolled single α-phase Mg–Li alloy (211 kJ/mol) [ 24 ], as-cast LAZ532 (160 kJ/mol) [ 3 ], commercial AZ80 alloy (216 kJ/mol) [ 36 ], extruded-state α(Mg)–β(Li) duplex phase Mg–Li alloy (148 kJ/mol) [ 37 ], as-cast Mg–2 Zn–0.3 Zr–0.9 Y alloy (236.2 kJ/mol) [ 38 ], and as-cast Mg–3 Sn–Ca alloy (236 kJ/mol) [ 39 ]. Despite being related to the other Mg–Li alloys with α + β duplex phases or a single β -phase, the deformation activation energy in the presented work was higher than those of the as-cast α + β alloy (127 kJ/mol) [ 40 ], the as-cast single β -phase Mg–Li alloy (95 kJ/mol) [ 41 ], the as-cast Mg–8 Li–3 Al–2 Zn alloy modified with Zr (108 kJ/mol) [ 8 ], the as-cast Mg–9 Li–1 Zn alloy (127 kJ/mol) [ 42 ], the as-cast Mg–11.5 Li–1.5 Al alloy (95 kJ/mol) [ 43 ], the as-cast Mg–3 Sn–2 Al–1 Zn–5 Li (139 kJ/mol) [ 44 , 45 ], the as-cast Mg–9 Li–3 Al alloy with Sr addition (110 kJ/mol) [ 46 ], and as-cast LA43M (110 kJ/mol) [ 4 ].…”

High Entropy Alloys Manufactured by Additive Manufacturing

“…But some valuable information from the corrosion behavior of AM stainless steels can be exported to AM HEAs: the strong relationship of the AM process conditions and the corrosion behavior. This is due to the significant influence of the processing parameters, the density and grain size [82] and the improvement of these properties with the heat treatments [83].…”