Structuring of the Ti6Al4V alloy surface by pulsed laser remelting

Grabowski, A.; Florian, Tomasz; Wieczorek, J.; Adamiak, M.

doi:10.1016/j.apsusc.2020.147618

Cited by 24 publications

(10 citation statements)

References 36 publications

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“…Because of the low values of the laser scanning spacing d and scanning rate v that were used, the scanning interval was much smaller than the focal spot diameter. 26 The formation of cauliflower-like microscale structure was the result of successive fast melting and resolidification processes at the oxide−metal interface. 27 The proposed mechanism is that the primary ablation products were mainly metal nanodroplets, which were ejected onto the surface of the titanium alloy at a high speed or were heated to a vapor/plasma state, which then reacted with the medium and produced the final nanostructures.…”

Section: Resultsmentioning

confidence: 99%

“…The BTMS layer was only found on the surface of the high-power processing group. Because of the low values of the laser scanning spacing d and scanning rate v that were used, the scanning interval was much smaller than the focal spot diameter . The formation of cauliflower-like microscale structure was the result of successive fast melting and resolidification processes at the oxide–metal interface .…”

Section: Resultsmentioning

confidence: 99%

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In Situ Construction of Black Titanium Oxide with a Multilevel Structure on a Titanium Alloy for Photothermal Antibacterial Therapy

Yang

Zhang

et al. 2022

ACS Biomater. Sci. Eng.

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Postsurgical infection of orthopedic fixation materials is considered to be the main cause of fixation failure. To address the problem, clinical treatment often relies on long-term antibiotics, secondary surgery, and so forth, which cause pain and suffering to patients. Constructing a light-responsive surface structure on the implant has attracted widespread attention for the management of postsurgical infections because of its noninvasiveness and controllability. Nevertheless, the application of light-responsive structures on implants is still limited by their unsafety and instability. In this work, a black titanium oxide layer with a multilevel structure and lattice defects was in situ constructed on a titanium alloy through pulsed laser ablation treatment. Under the synergistic effect of the multilevel structure and crystal defects, the surface of the titanium alloy exhibited good near-infrared light-responsive photothermal ability. The black titanium oxide multilevel structure reached high antibacterial efficiencies of about 99.37 and 99.29% against Staphylococcus aureus and Escherichia coli under 10 min near-infrared light irradiation. Furthermore, the black titanium oxide layer possessed similar biocompatibility compared with the titanium alloy. This near-infrared light-responsive photothermal therapy based on the construction of a multilevel structure and introduction of lattice defects provides an effective strategy for clinical postsurgical infections of orthopedic fixation.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

In Situ Construction of Black Titanium Oxide with a Multilevel Structure on a Titanium Alloy for Photothermal Antibacterial Therapy

Yang

Zhang

et al. 2022

ACS Biomater. Sci. Eng.

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“…Gas material then presses on the molten material that when the pressure is sufficiently high, the bubble can explode. Explosion ejects the liquid material outside of the laser treated area [47,48,[53][54][55][56][57][58]. The first dimple type was furthermore found at lower E p than the second dimple kind as the phase explosion requires higher energy fluence to be produced than surface vaporisation for the nanosecond pulsed lasers [47].…”

Section: Surface Morphologymentioning

confidence: 99%

“…φ th-sa of the samples (≈ 7 J/cm 2 ) was lower than the theoretical ablation fluence threshold th(Theo−e) (11.168 J/cm 2 ) that was calculated using Eq. 11 [26,31,58,62,74,75]: This is due to the explosive phase producing extra ablation material than the simple vaporising of the material. The explosion of the bubble provokes an increase of the amount of removed material owing to the ejection of the molten material, which is typical of the phase explosion [55].…”

Section: Topographymentioning

confidence: 99%

Effect of Surface Roughness on the Surface Texturing of 316 l Stainless Steel by Nanosecond Pulsed Laser

Al-Mahdy

Kotadia

Sharp

et al. 2022

Lasers Manuf. Mater. Process.

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Stainless steel 316L is an austenitic alloy that is widely used in varying industries due to its outstanding corrosion resistance, high strength, and ductility properties. However, the wear and friction resistance properties are low. Laser surface texturing can improve the wear and friction resistance of the material via the functionalisation of the surface. The laser surface texturing efficiency and the texture quality are defined by the material’s surface properties and laser parameters. The surface roughness is an important material property having an effect on laser surface texturing. This paper reports on a study of the material’s surface roughness influence on the texturing of 316L stainless steel with 1064 nm nanosecond pulsed laser. Single pulse shots were employed to avoid the topographic influence of the previous laser shots. The surface shape and the topography of the textures were assessed using optical microscopy and profilometry. It was observed that the textures produced were dimples of U-type and sombrero-like type geometries depending on surface roughness and pulse energy. The overall quality of the texture shape was better for smoother surfaces. The energy fluence necessary to generate textures is lower on surfaces of lower roughness than surfaces with high roughness. The surface at 24 nm of average roughness is the best surface for creating deep textures. The ablation mechanisms associated with high pulse energy, including plasma shielding, are produced at lower pulse energies for the 100 nm roughness, compared with other roughness samples.

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“…Li et al [ 22 ] obtained an antireflection microstructure with superhydrophobic properties, using a nanosecond laser treatment system to treat the surface of the titanium alloy. Grabowski et al [ 23 ] demonstrated that the appropriate selection of the pulse laser energy density and duration allows the thin layer of the Ti6Al4V surface to be melted. Moreover, Liu et al [ 24 ] achieved bionic, self-cleaning and anti-icing Ti6Al4V alloy surfaces.…”

Section: Introductionmentioning

confidence: 99%

Changes in the Laser-Processed Ti6Al4V Titanium Alloy Surface Observed by Using Raman Spectroscopy

et al. 2022

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This works reports on the effects of treating the surface of Ti6Al4V titanium alloy samples with a laser with a wavelength of 1064 nm, operating in a pulsed and continuous mode. The obtained surfaces with different roughness, complexity and wettability were examined by Raman spectroscopy in order to recognize the presence of titanium oxides on the functionalized surface. The layer of titanium oxides on the surface with the identified rutile phase obtained by laser treatment in the continuous wave mode is a reason for a hydrophobic surface that appeared 50 days after the treatment process. In the case of the surface obtained by the pulsed laser process, only local points at which the Raman bands attributed to the metastable phases anatase and brookite of TiO2 can be identified. In this treatment process, complete surface hydrophilicity was observed during 29 days after the functionalization process (maximal contact angle observed during this time was 68.4 deg). For some functionalization processes of different parameters, the contact angle remained immeasurable until 119 days after the functionalization process. In summary, Raman spectroscopy identifies surface changes of Ti6Al4V after laser processing.

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Structuring of the Ti6Al4V alloy surface by pulsed laser remelting

Cited by 24 publications

References 36 publications

In Situ Construction of Black Titanium Oxide with a Multilevel Structure on a Titanium Alloy for Photothermal Antibacterial Therapy

In Situ Construction of Black Titanium Oxide with a Multilevel Structure on a Titanium Alloy for Photothermal Antibacterial Therapy

Effect of Surface Roughness on the Surface Texturing of 316 l Stainless Steel by Nanosecond Pulsed Laser

Changes in the Laser-Processed Ti6Al4V Titanium Alloy Surface Observed by Using Raman Spectroscopy

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