https://www.onlinelibrary.wiley.com/doi/pdf/10.1002/jps.20727

Antibody structure, instability, and formulation

Fouling release coatings: a nontoxic alternative to biocidal antifouling coatings.

Engineering biocompatible implant surfaces

Metal additive manufacturing in aerospace: A review

The mechanical and microstructural properties of 316L stainless steel (SS) fabricated via Direct Laser Deposition (DLD), a laser-based additive manufacturing method, are presented and compared with those of conventionally-built counterparts. Using a Laser Engineered Net Shaping (LENS ® ) DLD system, the time interval between successive layer deposits, or inter-layer/idle time, for fabricating cylindrical specimens vertically-upward was varied by building either one or nine samples per build plate – thus increasing total assembly volume per build. Subsequently, the effect of thermal history, as well as heat treatment, on microstructural (i.e. grain size and morphology) and mechanical (i.e. tensile, compression, and microhardness) properties of DLD parts were investigated. Results indicate that the DLD 316L SS samples produced herein have a higher yield and ultimate tensile strength relative to their cast and wrought forms. Furthermore, the thermal history, microstructural evolution, and mechanical properties of DLD 316L SS are shown to be dependent on the time interval between deposits. Longer local time intervals result in higher cooling rates, leading to finer microstructures, higher/uniform strength and lower elongation to failure. In addition, porosity and less integral metallurgical bonds are found to be more prevalent in locations further upward from the build plate due to reduced laser penetration depths (e.g. previous-layer remelting decreases). Conversely, parts manufactured with shorter time intervals were found to possess a coarser microstructure, lower strength and higher elongation to failure – attributable to lower cooling rates caused by an increased bulk temperature in the part. These results may aid in future design and control of more efficient, constant-power DLD processes – especially with regard to building multiple and/or larger parts; an approach desirable for minimizing small-to-medium lot production times.

Effects of process time interval and heat treatment on the mechanical and microstructural properties of direct laser deposited 316L stainless steel

The corrosion behaviour of austenitic and duplex stainless steels in artificial saliva with the addition of fluoride

Electrochemical and XPS studies of the passive film formed on stainless steels in borate buffer and chloride solutions

Mechanical and anticorrosion properties of nanosilica-filled epoxy-resin composite coatings

Tribological behaviour and lubrication performance of hexagonal boron nitride (h-BN) as a replacement for graphite in aluminium forming

The composition of the passive layers formed by electrochemical oxidation at different passivation potentials on Co–Cr–Mo and Co–Ni–Cr–Mo alloys in simulated physiological solution (SPS), with and without the complexing agent EDTA, was studied by X-ray photoelectron spectroscopy. Composition as a function of depth, cationic fraction and thickness of the passive film was determined. Chromium oxide is shown to be the major constituent of the passive layer on both Co–Cr–Mo and Co–Ni–Cr–Mo alloys. The minor constituents of the passive layers, Co- and Mo-oxide in the case of Co–Cr–Mo alloy and Ni-, Co- and Mo-oxides in the case of Co–Ni–Cr–Mo alloy, are also located in the outer part of the layer. EDTA affects the formation of the passive layer on each alloy. The content of Co-, Ni- and Mo-oxide in the passive layer is lower in the presence of EDTA, thus indicating increased solubility associated with higher stability constants for complexes of metal cations with EDTA.

Aleksandra Kocijan

Papers

The corrosion behaviour of austenitic and duplex stainless steels in artificial saliva with the addition of fluoride

Electrochemical and XPS studies of the passive film formed on stainless steels in borate buffer and chloride solutions

Mechanical and anticorrosion properties of nanosilica-filled epoxy-resin composite coatings

Tribological behaviour and lubrication performance of hexagonal boron nitride (h-BN) as a replacement for graphite in aluminium forming

Cobalt-based alloys for orthopaedic applications studied by electrochemical and XPS analysis.