Laser micropolishing of AISI 304 stainless steel surfaces for cleanability and bacteria removal capability

Giorgi, Chiara; Furlan, Valentina; Demir, Ali Gökhan; Tallarita, Elena; Candiani, Gabriele; Previtali, Barbara

doi:10.1016/j.apsusc.2017.02.083

Cited by 27 publications

(11 citation statements)

References 21 publications

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“…However, some studies have shown that certain hydrophilic surfaces also facilitate bacterial adhesion [79][80][81][85][86][95][96] . Microscopic observation revealed that fewer Pseudomonas aeruginosa and Staphylococcus aureus adhered to hydrophobic silicone surfaces than to hydrophilic surfaces [85] .…”

Section: Hydrophobicity and Chargementioning

confidence: 99%

Advances in the study of adhesion behavior between bacteria and material interfaces

Liu

Gan

Liu

et al. 2022

Preprint

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In biomedical, industrial, and marine fields, interactions between bacteria and material interfaces are of great importance in biofilm formation, biofouling, the development of antimicrobial surface technologies, and the changing patterns of bacterial adhesion behavior on non-biological surfaces become a focus of research by researchers. Bacteria move from planktonic to adhesive behavior through near-interfacial sociological behavior, specificity (specific bacterial appendages such as hairs, flagella, curls, etc. that can bind to some chemicals on certain surfaces), non-specific interactions (van der Waals forces, electrostatic interactions, hydrophobic interactions or acid-base interactions) and surface mechanical induction, a process that the bacteria themselves can influence, the nature of the interfacial material and the environment. A variety of methods have been developed to measure cell adhesion. The continued development of atomic force microscopy (AFM) techniques provides a more advanced means of exploring bacterial-surface interactions and the various physicochemical properties of bacterial cells. Based on a large amount of literature research and tracking of related technological research developments, this paper mainly introduces the domestic and international research progress on the adhesion behavior between bacteria and material interfaces in detail from the aspects of adhesion mechanism, influencing factors, and testing methods, to provide a solid theoretical basis for further advancing the study of bacterial-interface adhesion and to get more scholars’ attention.

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Section: Hydrophobicity and Chargementioning

confidence: 99%

Advances in the study of adhesion behavior between bacteria and material interfaces

Liu

Gan

Liu

et al. 2022

Preprint

View full text Add to dashboard Cite

show abstract

“…Hence, the SR strategy consisted in the use higher pulse overlap and lower line overlap compared to the volume pass. The P strategy aims to provide a larger and shallower molten pool, similar to the conditions used in laser polishing [28], [29]. For the P strategy, a defocused beam was employed enlarging the beam diameter to approximately 100 m on the powder bed.…”

Section: Experimental Planmentioning

confidence: 99%

Investigation of remelting and preheating in SLM of 18Ni300 maraging steel as corrective and preventive measures for porosity reduction

Demir

Previtali

2017

Int J Adv Manuf Technol

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115

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One of the most critical defects in selective laser melting (SLM) is the porosity formation. Optimization of process parameters allow for reducing the porosity levels to lower than <1% is possible in most of the cases.Susceptibility to porosity formation can be higher for different alloys as function of chemical composition due to higher spark generation and molten pool instabilities. On the other hand, the probability of porosity formation increases in larger components that due to extended processing time. Powder recoater wear, increase in thermal load, and accumulation of particles in the processing chamber become more relevant as the processing time increases. Hence, the use of integrated monitoring and correction strategies becomes crucially important.In this work, three different correction strategies are discussed for the correction of porosity during the SLM of 18Ni300 maraging steel. The main aim is the develop a possible correction and prevention scheme to be used within a fully monitored SLM process. The 18Ni300 maraging steel is susceptible to high levels of porosity due to the empirically observed melt-pool instabilities as well as high spark and vapour generation.The correction methods consisted of re-melting of the defected layer employing different scan strategies namely "double-pass", "soft-melting", and "polishing". As a preventive strategy preheating at 170°C was also evaluated. At an initial stage, all the strategies were tested throughout the part built in order to assess their general capacity in improving the part density. Surface roughness, geometrical error and material microhardness were also evaluated to assess the impact of the strategies on the other quality aspects. The results indicate the capacity of improving the part density and reduce the part roughness effectively.

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“…In order to improve the implant-tissue interaction surface preparations are common to orthopedic implants. Laser surface texturing is a less-explored option in terms of industrial use, despite several intrinsic advantages such as non-contact interaction, environmentally friendly processing conditions, high repeatability and flexibility and the possibility to generate both deterministic and stochastic surface structures through a digital manufacturing environment [11][12][13]. The main issue lies over the fact that several laser sources are available, which can generate different surface structures.…”

Section: Introductionmentioning

confidence: 99%

Laser surface texturing of β-Ti alloy for orthopaedics: Effect of different wavelengths and pulse durations

Menci

Demir

Waugh

et al. 2019

Applied Surface Science

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Laser micropolishing of AISI 304 stainless steel surfaces for cleanability and bacteria removal capability

Cited by 27 publications

References 21 publications

Advances in the study of adhesion behavior between bacteria and material interfaces

Advances in the study of adhesion behavior between bacteria and material interfaces

Investigation of remelting and preheating in SLM of 18Ni300 maraging steel as corrective and preventive measures for porosity reduction

Laser surface texturing of β-Ti alloy for orthopaedics: Effect of different wavelengths and pulse durations

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