One of the established limitations metal additive manufacturing (AM) methods, such as selective laser melting (SLM), is resulting rough surface finish. Laser polishing one method that can be used to achieve an improved finish on AM printed parts. This study focused parts using CO₂ beam irradiation. Despite fact several researchers have investigated traditional abrasive method, there still a lack information reporting In this study, 316L stainless steel cylindrical samples were polished...

Poor surface quality of Additively Manufactured (AM) components, can greatly increase the overall cost and lead time high-performance components.Examples are medical devices where surfaces may contact patient's skin hence need to be smooth aerospace components with high fatigue strength requirements roughness could reduce life.The average (Ra) AM parts reach levels greater than 50 microns maximum distance between peaks low valleys more 300 microns.As such, there is a for fast, effective...

Laser-powder interaction and meltpool dynamics govern the physics behind selective laser melting process. Spattering is an unavoidable phenomenon taking place during process which results in reconstituted particles falling within powder bed. These are known to influence between incident beam powder. can consequently have a negative effect on final part integrity quality of recycled Hence, it crucial assess characteristics spatter avoid printing defective parts. This work reports detailed...

Abstract Metal additive manufacturing, which uses a layer-by-layer approach to fabricate parts, has many potential advantages over conventional techniques, including the ability produced complex geometries, fast new design part production, personalised have lower cost and produce less material waste. While these make AM an attractive option for industry, determining process parameters result in specific properties, such as level of porosity tensile strength, can be long costly endeavour. In...

Metalloid nanoparticles (MNPs) possess unique physicochemical properties but are challenging to create through biological or chemical routes. Using Pulsed Laser Ablation in Liquid (PLAL), Mg–C MNPs fabricated from powders. The produced nanocolloids were ablated after the target was removed tailor particle size. with a mean size 300 nm could be reduced 60 nm. Alternatively, of increased 90 increase/decrease is controlled by laser processing parameters and showcases ability PLAL for real-world...

In the realm of materials science and engineering, pursuit advanced with tailored properties has been a driving goal behind technological progress. Scientific interest in laser powder bed fusion (L-PBF) fabricated NiTi alloy recent times seen an upsurge activity. this study, we investigate impact varying volume energy density (VED) during L-PBF on microstructure corrosion behaviour alloys both scan (XY) built (XZ) planes. The microstructural evolution planes was characterized by electron...

Additive free conductive ink formulation via green techniques and its direct printing is critical for many applications including smart electronics, solar cells, healthcare electrochemical energy storage. The available printable generations are far away from ideal. This study reports the development of additive silver (Ag) nano particle (NP) inks flow-based Laser Ablation Synthesis in Solution (LASiS) system Aerosol Jet printing. Examples LASiS Ag NP printed tracks patterns on unprocessed...

Laser-Powder Bed Fusion (L-PBF) of metallic parts is a highly multivariate process. An understanding powder feedstock properties critical to ensure part quality. In this paper, detailed examination two commercial stainless steel 316L powders produced using the gas atomization process presented. particular, effects (particle size and shape) on rheology were examined. The results presented suggest that strongly influence are important factors in selection suitable for use an additive...

This study investigates the greater coefficient of Performance (COP) exhibited by Ni-Ti lattice geometry (LS) over solid (SS) for solid-state heating and cooling. The LS's advantageous COP can be attributed to factors including variations in phase transformation behavior, a larger surface area facilitating enhanced heat transfer, volume water heated per cycle owing cavities. Moreover, LS demands lower compression forces due its mass geometry, which contribute heightened energy efficiency....

Abstract Surface biofouling, corrosion, and wettability are important parameters to understand characterize aluminum alloys prevent the failure in marine environments. Antifouling technologies predominantly encompass chemical biocidal approaches with negative environmental consequences. Therefore, this study focuses on a new method of producing non‐toxic effective antifouling corrosion‐resistant surfaces. In study, ultrafast laser texturing is used modify surface an alloy using femtosecond...

Abstract Hydrophobicity plays a pivotal role in mitigating surface fouling, corrosion, and icing critical marine aerospace environments. By employing ultrafast laser texturing, the characteristic properties of material’s can be modified. This work investigates potential an advanced texturing manufacturing process to enhance hydrophobicity aluminium alloy 7075. The were characterized using goniometry, 3D profilometry, SEM, XPS analysis. findings from this study show that parameters play...

Abstract ZnO thin films were grown by pulsed laser deposition on three different substrates: sapphire (0 0 1), MgO (1 0) and fused silica (FS). The structure morphology of the characterized x-ray diffraction scanning electron microscopy defect studies carried out using slow positron implantation spectroscopy (SPIS). Films deposited all substrates studied in this work exhibit wurtzite are an average crystallite size 20–100 nm. However, strong differences microstructure various found....

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTChemistry of trifluoramine oxide. I. Synthesis and characterization trifluoramineW. B. Fox, J. S. MacKenzie, E. R. McCarthy, Holmes, F. Stahl, JuurikCite this: Inorg. Chem. 1968, 7, 10, 2064–2067Publication Date (Print):October 1, 1968Publication History Published online1 May 2002Published inissue 1 October 1968https://pubs.acs.org/doi/10.1021/ic50068a022https://doi.org/10.1021/ic50068a022research-articleACS PublicationsRequest reuse...

This study investigates the fabrication of Ti6Al4V functionally graded material via high power and speed laser surface modification (LSM). The original sample microstructures consisted elongated equiaxed α phase with a grain boundary β phase. Nine different LSM process parameter sets were applied to these samples. Scanning electron microscopy showed fine acicular martensitic next treated samples in all cases. A transition microstructure zone beneath was observed, larger, grains some growth....

This paper presents an examination of the production copper air filters via Hydraulic Pressing (HP) method. Processing conditions examined included powder particle type (spherical and dendritic), varying compaction pressures (635, 714, 793 MPa) different pore forming (polyvinyl alcohol (PVA)) concentrations (1, 2, 3 wt.%). Following compaction, samples were thermally sintered in a two stage sintering regime at 200 °C 750 °C. The morphology, porosity, mechanical properties characterised....

We report x-ray diffraction (XRD) (2θ–ω and rocking curve) transmission electron microscopy (TEM) measurements on crystallographically textured ZnO thin films of varying thicknesses crystallite mosaic spread deposited by pulsed-laser deposition Si. The integrated areas the (0 0 2) reflections in 2θ–ω mode do not scale with film thickness some cases show discrepancies two orders magnitude compared expectations based solely sample thicknesses. Intensity differences this type are regularly used...