Influence of laser parameters in surface texturing of Ti6Al4V and AA2024-T3 alloys

Ahuir-Torres, J.I.; Arenas, M.A.; Perrie, Walter; Damborenea, J. de

doi:10.1016/j.optlaseng.2017.12.004

Cited by 51 publications

(31 citation statements)

References 37 publications

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“…The influence of laser parameters on surface textures of titanium alloys was considered by Ahuir-Torres et al. [11]. They indicated that, via adjusting the laser frequency and pulse length, the micro-texturing of the surface could be resulted through the ultrafast laser ablation process.…”

Section: Introductionmentioning

confidence: 99%

Laser processing of Ti6Al4V alloy: wetting state of surface and environmental dust effects

Yilbaş

Ali

Al‐Sharafi

et al. 2019

Heliyon

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Laser processing of Ti6Al4V alloy surface, via repetitive pulses, is realized incorporating the nitrogen assisting gas. The texture characteristics of the surface and wetting state are analyzed. The free energy of the laser treated surface is estimated. The influence of the dust particles on the treated and untreated surfaces is examined. The solution formed due to water condensate on the dust particles is evaluated. The adhesion of the mud dried solution on the treated and untreated surfaces is assessed through determining the tangential force required for the removal of the solution from the surface. The findings demonstrate that the high power laser repetitive pulse heating results in formation of the hieratically distributed micro/nano pillars on the workpiece surface. The wetting state of the processed surface remains hydrophilic because of the large gap size between the micro/nano pillars. The free energy of the laser textured surface is similar to that obtained for the TiN coated surfaces, which is because of the nitride compounds developed during the processing. The dried liquid solution strongly adheres at the surface and the force needed for removing the dried liquid solution is almost four times of the friction force at the surface. The liquid solution gives rise to locally scattered shallow pit sites on as received surface. This phenomenon does not occur for the laser treated surface, which is related to the passive layer developed on the surface.

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Section: Introductionmentioning

confidence: 99%

Laser processing of Ti6Al4V alloy: wetting state of surface and environmental dust effects

Yilbaş

Ali

Al‐Sharafi

et al. 2019

Heliyon

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“…Exposures were static (no scanning was conducted). In that work, it was shown that more significant elemental change and oxidation were observed at the rim of laser impact and not in the center [4]. Section 3.4. of this paper provides insight into the structure of the tip of a conical microstructure, grown above the initial surface by redeposition.…”

Section: Discussionmentioning

confidence: 89%

“…While detailed research of conical microstructure growth on AA2024 has already been conducted, to the best of our knowledge, no attempts have been made to study the internal contents of the conical microstructures using FIB-SEM and conducting an EDX study of a lamella cut from the tip of a conical structure. A research paper has conducted an EDX study of the surface of ablated AA2024 [4]. However, there are significant differences between that work and ours.…”

Section: Discussionmentioning

confidence: 95%

FIB-SEM Investigation of Laser-Induced Periodic Surface Structures and Conical Surface Microstructures on D16T (AA2024-T4) Alloy

Salimon

Mailis

Salimon

et al. 2020

Metals

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The use of aluminum alloy AA2024-T4 (Russian designation D16T) in applications requiring a high strength-to-weight ratio and fatigue resistance such as aircraft fuselage often demands the control and modification of surface properties. A promising route to surface conditioning of Al alloys is laser treatment. In the present work, the formation of ripples and conical microstructures under scanning with femtosecond (fs) laser pulses was investigated. Laser treatment was performed using 250 fs pulses of a 1033 nm Yb:YAG laser. The fluence of the pulses varied from 5 to 33 J/cm2. The scanning was repeated from 1 to 5 times for different areas of the sample. Treated areas were evaluated using focused ion beam (FIB)- scanning electron microscopy (SEM) imaging and sectioning, energy-dispersive X-ray (EDX) spectroscopy, atomic force microscopy (AFM), and confocal laser profilometry. The period of laser-induced periodic surface structures (LIPSS) and the average spacing of conical microstructures were deduced from SEM images by FFT. Unevenness of the treated areas was observed that is likely to have been caused by ablation debris. The structural and elemental changes of the material inside the conical microstructures was revealed by FIB-SEM and EDX. The underlying formation mechanisms of observed structures are discussed in this paper.

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“…1a, reveals the topography of the structure, which shows on average a structure depth of 36.2 µm. This texture emerges due to the nanosecond-pulsed laser process, where the thermal diffusion length for aluminum is in the µm-range, leading to an increase of molten material and in consequence to the deep structures in this order of magnitude [21,22].…”

Section: Fabrication Of Periodic Structures Using Dlw and Dlip Technomentioning

confidence: 99%

Multifunctional aluminium surfaces – Laser-structured micropatterns with ice-repellent, superhydrophobic and easy-to-clean properties

et al. 2020

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In this work, the fabrication of multifunctional periodic microstructures on pure aluminium is presented. Three different geometries were fabricated with feature sizes ranging between 7 µm and 50 µm by using laser-based microstructuring methods. In detail, nanosecond pulsed direct laser writing and picosecond pulsed direct laser interference patterning were used with infrared laser radiation. The wetting characteristics of these structures were investigated performing static water contact angle measurements as well as by measuring the contact angle hysteresis and the sliding angle. The final wetting results show constant static contact angles above 150°, permitting the water droplets to roll off the substrate as well as collecting contamination at the same time. This self-cleaning effect led to a reduction of up to 94% of the spread of 1 µm sized manganese oxide particles. In addition, the freezing time required for droplets laying on the patterned surfaces was increased nearly by 300% at a temperature of 20 °C below zero. Finally, the results are compared to finite element simulations of heat transfer.

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Influence of laser parameters in surface texturing of Ti6Al4V and AA2024-T3 alloys

Cited by 51 publications

References 37 publications

Laser processing of Ti6Al4V alloy: wetting state of surface and environmental dust effects

Laser processing of Ti6Al4V alloy: wetting state of surface and environmental dust effects

FIB-SEM Investigation of Laser-Induced Periodic Surface Structures and Conical Surface Microstructures on D16T (AA2024-T4) Alloy

Multifunctional aluminium surfaces – Laser-structured micropatterns with ice-repellent, superhydrophobic and easy-to-clean properties

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