Ti6Al4V functionally graded material via high power and high speed laser surface modification

Geng, Yaoyi; McCarthy, Éanna; Brabazon, Dermot; Harrison, Noel M.

doi:10.1016/j.surfcoat.2020.126085

Cited by 16 publications

(4 citation statements)

References 29 publications

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“…It is hypothesized that rough-textured biomaterial surfaces promote osteoblast cell adhesion and development [ 51 , 52 ]. Increased surface roughness increases the number of grain boundaries per unit area and enhances cell adhesion [ 53 ]. Roughness and alloy surface properties were reported to be essential for cell activity [ 54 ], and cell adhesion was found to be dependent on titanium oxide thickness, micro porosity, and surface roughness [ 37 ].…”

Section: Resultsmentioning

confidence: 99%

Surface Properties and In Vitro Corrosion Studies of Blasted and Thermally Treated Ti6Al4V Alloy for Bioimplant Applications

et al. 2022

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The biomedical Ti6Al4V alloy was thermally treated under sandblasting and mirror finish surface preparation conditions. The surface morphology, structure, roughness, wettability, and energy were characterized. Microhardness and in vitro corrosion studies were carried out. X-ray diffraction results showed a formation of rutile TiO2 phase for thermally treated samples under different pretreated conditions. The thermally oxidized samples exhibited an increase in microhardness compared to the untreated mirror finish and sandblasted samples by 22 and 33%, respectively. The wettability study revealed enhanced hydrophilicity of blasted and thermally treated samples. The surface energy of the thermal treatment samples increased by 26 and 32.6% for mirror surface and blasted preconditions, respectively. The acquired in vitro corrosion results using potentiodynamic polarization measurement and electrochemical impedance spectroscopy confirmed the surface protective performance against corrosion in Hank’s medium. The enhanced surface characteristics and corrosion protection of treated Ti6Al4V alloy give it potential for bio-implant applications.

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Section: Resultsmentioning

confidence: 99%

Surface Properties and In Vitro Corrosion Studies of Blasted and Thermally Treated Ti6Al4V Alloy for Bioimplant Applications

et al. 2022

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“…Accordingly, different scales have been considered to assess the gain in mechanical performance. Authors have been used extensively in both conventional micro-indentation [ 41 , 42 , 43 ] as well as instrumented nanoindentation [ 44 ]. It is important to take caution when comparing micro- and nano-indentation values as different tested volumes are considered.…”

Section: Surface Mechanical Benefitsmentioning

confidence: 99%

Low Temperature Nitriding of Metal Alloys for Surface Mechanical Performance

Drouet

Bourhis

2023

Materials

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Metallic alloys are, by essence, ductile and stiff and can support loads without sudden rupture. This ductility becomes a disadvantage when applications require wear resistance. In this case, the hardening of the surface is required while retaining a core performance. Here, nitriding at low temperatures has proven to be beneficial and has potential. In fact, any phase transitions or unwanted compound precipitations that occur at higher temperatures have to be avoided as they would have a deleterious effect on the chemical homogeneity and mechanical properties. The present contribution summarizes the achievements made with such treatments on metallic alloys. We considered the most popular treatments, namely plasma, implantation, and gas nitridings.

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“…After a laser-induced heat treatment, the formation of a martensitic α-phase was observed as a result of the transformation of the alpha-phase of titanium alloys initially into a beta-phase, and then during the rapid cooling of a material after laser treatment, a martensitic α-phase was formed [134]. Geng et al [135] indicated that the hardness tests performed after a laser modification of the alloy showed that the measurement of this parameter performed in the β-phase, yielded lower values of hardness than in the α-phase. The results for the β-phase were characterized by large deviations for the elastic modulus due to the small thickness of the β-grains and the presence of α-grains.…”

Section: Hardnessmentioning

confidence: 99%

Influence of Laser Modification on the Surface Character of Biomaterials: Titanium and Its Alloys—A Review

Sypniewska

Szkodo

2022

Coatings

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Laser surface modification is a widely available and simple technique that can be applied to different types of materials. It has been shown that by using a laser heat source, reproducible surfaces can be obtained, which is particularly important when developing materials for medical applications. The laser modification of titanium and its alloys is advantageous due to the possibility of controlling selected parameters and properties of the material, which offers the prospect of obtaining a material with the characteristics required for biomedical applications. This paper analyzes the effect of laser modification without material growth on titanium and its alloys. It addresses issues related to the surface roughness parameters, wettability, and corrosion resistance, and discusses how laser modification changes the hardness and wear resistance of materials. A thorough review of the literature on the subject provides a basis for the scientific community to develop further experiments based on the already investigated relationships between the effects of the laser beam and the surface at the macro, micro, and nano level.

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Ti6Al4V functionally graded material via high power and high speed laser surface modification

Cited by 16 publications

References 29 publications

Surface Properties and In Vitro Corrosion Studies of Blasted and Thermally Treated Ti6Al4V Alloy for Bioimplant Applications

Surface Properties and In Vitro Corrosion Studies of Blasted and Thermally Treated Ti6Al4V Alloy for Bioimplant Applications

Low Temperature Nitriding of Metal Alloys for Surface Mechanical Performance

Influence of Laser Modification on the Surface Character of Biomaterials: Titanium and Its Alloys—A Review

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