Laser Powder Cladding of Ti-6Al-4V α/β Alloy

Al-Sayed, Samar Reda; Al-Shatri, Hussein; Nofal, Adel; Elnaby, Salah Elden Ibrahim Hasseb; Elgazzar, Haytham; Sabour, H. A.

doi:10.3390/ma10101178

Cited by 39 publications

(15 citation statements)

References 34 publications

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“…These discs were ground and polished with SiC paper of 500, 800, 1200, 2000 and 2400 grit size; cleaned ultrasonically in absolute ethanol for 30 min and dried. About 100 ml of solution containing 92 ml of distilled water, 2 ml of hydrofluoric acid (HF) and 6 ml of nitric acid (HNO 3 ) was used as an etch solution for 3 min to remove the oxide film subsequently, the discs were rinsed with acetone before coating (AL-Sayed Ali et al, 2017). Approximately 0.3 g of β-TCP sintered powder (≥98% β phase basis, 49,963 Sigma–Aldrich) was dispersed in 10 ml of ethanol (≥99.8% GC 24,103 Sigma–Aldrich) to obtain a homogenous slurry, which was preplaced as a powder bed on the pure Ti surface; the substrate was spray-coated with the slurry (Azzawi et al, 2017, Cheng et al, 2005).…”

Section: Methodsmentioning

confidence: 99%

Implementation and characterization of coating pure titanium dental implant with sintered β-TCP by using Nd:YAG laser

Safi

Hussein

Al-Shammari

et al. 2019

The Saudi Dental Journal

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ObjectivesThis work presents laser coating of grade 1 pure titanium (Ti) dental implant surface with sintered biological apatite beta-tricalcium phosphate (β-TCP), which has a chemical composition close to bone.Materials and methodsPulsed Nd:YAG laser of single pulse capability up to 70 J/10 ms and pulse peak power of 8 kW was used to implement the task. Laser pulse peak power, pulse duration, repetition rate and scanning speed were modulated to achieve the most homogenous, cohesive and highly adherent coat layer. Scanning electron microscopy (SEM), energy dispersive X-ray microscopy (EDX), optical microscopy and nanoindentation analyses were conducted to characterise and evaluate the microstructure, phases, modulus of elasticity of the coating layer and calcium-to-phosphate ratio and composition.Results showed that the laser power and scanning speed influenced coating adherence. The cross-sectional field-emission scanning electron microscopy images at low power and high speed showed poor adherence and improved as the laser power increased to 2 kW. Decreasing the scanning speed to 0.2 mm/s at the same power of 2 kW increased adherence. EDX results of the substrate demonstrated that the chemical composition of the coat layer did not change after processing. Moreover, the maps revealed proper distribution of Ca and P with some agglomeration on the surface. The sharp peaks on the X-ray diffraction patterns indicated that β-TCPs in the coat layer were mostly crystalline. The elastic modulus was low at the surface and increased gradually with depth to reach 19 GPa at 200 nm; this value was close to that of bone. The microhardness of the coated substrate increased by about 88%. The laser pulse energy of 8.3 J, pulse peak power of 2 kW, pulse duration of 4.3 min, repetition rate of 10 Hz and scanning speed of 0.2 ms−1 yielded the best results.ConclusionBoth processing and coating have potential use for dental implant applications.

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Section: Methodsmentioning

confidence: 99%

Implementation and characterization of coating pure titanium dental implant with sintered β-TCP by using Nd:YAG laser

Safi

Hussein

Al-Shammari

et al. 2019

The Saudi Dental Journal

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“…Although there are a wide range of modification treatments by chemical and mechanical procedures to adapt the surface to specific conditions, some treatments such as knurling can generate mechanical stress, and in other cases surface contamination, or result in variations of the properties in the inner layers of the alloy. In this aspect, surface texturing treatments using laser techniques allow the generation of topographies with microgeometry, and properties that are adapted to specific working conditions, without affecting the deeper layers of the material [14,[16][17][18][19][20][21][22][23][24][25][26].…”

Section: Introductionmentioning

confidence: 99%

Effects of Laser Microtexturing on the Wetting Behavior of Ti6Al4V Alloy

Salguero

Mayuet³

et al. 2018

Coatings

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Surface modification procedures by laser techniques allow the generation of specific topographies and microstructures that enable the adaptation of the external layers of materials for specific applications. In laser texturing processes, it is possible to maintain control over the microgeometry and dimensions of the surface pattern through varying the processing parameters. One of the main areas of interest in the field of surface modification treatments is the ability to generate topographies that are associated with specific surface finishes, in terms of roughness, that can improve the manufactured part's functional capabilities. In this aspect, several types of phenomena have been detected, such as the friction and sliding wear behavior or wetting capacity, which maintain a high dependence on surface roughness. In this research, surface texturing treatments have been developed by laser techniques through using the scanning speed of the beam (V s) as a control parameter in order to generate samples that have topographies with different natures. Through assessments of surface finish using specialized techniques, the dimensional and geometrical features of the texturized tracks have been characterized, analyzing their influence on the wetting behavior of the irradiated layer. In this way, more defined texturing grooves has been developed by increasing the V s , which also improves the hydrophobic characteristics of the treated surface. However, due to the lack of uniformity in the solidification process of the irradiated area, some deviations from the expected trends and singular points can be observed. Using the contact angle method to evaluate the wetting behavior of the applied treatments found increases in the contact angle values for high texturing speeds, finding a maximum value of 65.59 • for V s = 200 mm/s.

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“…Based on the current level of technology, a 200-μm-thick Al cladding coating is expected to last for more than 30 years in the splash area for steel structures. Therefore, the preparation of laser cladding Al coatings has become a hot topic for research in the field of long-term heavy corrosion protection [ 18 , 19 ]. At present, Yang et al [ 20 ] have prepared an Al-TiC in situ composite coating fabricated by low power pulsed laser cladding on AZ91D magnesium alloy.…”

Section: Introductionmentioning

confidence: 99%

Microstructures and Properties of Laser Cladding Al-TiC-CeO2 Composite Coatings

Dejun

Song

2018

Materials

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Al-TiC-CeO2 composite coatings have been prepared by using a laser cladding technique, and the microstructure and properties of the resulting composite coatings have been investigated using scanning electron microscopy (SEM), a 3D microscope system, X-ray diffraction (XRD), micro-hardness testing, X-ray stress measurements, friction and wear testing, and an electrochemical workstation. The results showed that an Al-Fe phase appears in the coatings under different applied laser powers and shows good metallurgical bonding with the matrix. The dilution rate of the coating first decreases and then increases with increasing laser power. The coating was transformed from massive and short rod-like structures into a fine granular structure, and the effect of fine grain strengthening is significant. The microhardness of the coatings first decreases and then increases with increasing laser power, and the maximum microhardness can reach 964.3 HV0.2. In addition, the residual stress of the coating surface was tensile stress, and crack size increases with increasing stress. When the laser power was 1.6 kW, the coating showed high corrosion resistance.

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Laser Powder Cladding of Ti-6Al-4V α/β Alloy

Cited by 39 publications

References 34 publications

Implementation and characterization of coating pure titanium dental implant with sintered β-TCP by using Nd:YAG laser

Implementation and characterization of coating pure titanium dental implant with sintered β-TCP by using Nd:YAG laser

Effects of Laser Microtexturing on the Wetting Behavior of Ti6Al4V Alloy

Microstructures and Properties of Laser Cladding Al-TiC-CeO2 Composite Coatings

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