Mechanical micro-texturing of Ti-6Al-4V surfaces for improved wettability and bio-tribological performances

Pratap, Tej; Patra, Karali

doi:10.1016/j.surfcoat.2018.05.056

Cited by 71 publications

(35 citation statements)

References 49 publications

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“…The surface wettability of the alloy is the crucial property that impacts the other significant characteristics and also influences the enduring usage of the alloy substrate [ 31 ]. The hydrophobic or hydrophilic nature of the surface represented the wettability which was measured by the water contact angle (WCA).…”

Section: Methodsmentioning

confidence: 99%

Surface Characterization and Tribological Performance Analysis of Electric Discharge Machined Duplex Stainless Steel

et al. 2020

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The present article focused on the surface characterization of electric discharge machined duplex stainless steel (DSS-2205) alloy with three variants of electrode material (Graphite, Copper-Tungsten and Tungsten electrodes). Experimentation was executed as per Taguchi L18 orthogonal array to inspect the influence of electric discharge machining (EDM) parameters on the material removal rate and surface roughness. The results revealed that the discharge current (contribution: 45.10%), dielectric medium (contribution: 18.24%) majorly affects the material removal rate, whereas electrode material (contribution: 38.72%), pulse-on-time (contribution: 26.11%) were the significant parameters affecting the surface roughness. The machined surface at high spark energy in EDM oil portrayed porosity, oxides formation, and intermetallic compounds. Moreover, a pin-on-disc wear analysis was executed and the machined surface exhibits 70% superior wear resistance compared to the un-machined sample. The surface thus produced also exhibited improved surface wettability responses. The outcomes depict that EDMed DSS alloy can be considered in the different biomedical and industrial applications.

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Section: Methodsmentioning

confidence: 99%

Surface Characterization and Tribological Performance Analysis of Electric Discharge Machined Duplex Stainless Steel

et al. 2020

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“…Totally, wear mechanism was explained as a cause of creating textured surface (a third body) and generating wear particles. A study by Pratap and Patra [48] showed that the mechanical surface modification enhanced the surface wettability and tribological properties of Ti-6Al-4V alloy. This comparative study of three different micro-tools (micro ball-end mill, micro flat-end mill, and micro drill) targeted to produce circular micro dimples on the surface with semi-hemispherical, flat, and conical end geometries, respectively.…”

Section: Surface Texturingmentioning

confidence: 99%

“…The enhancement of wettability by surface texturing may depend on some other factors such as primary surface conditions and textured geometry. Texturing with micro-dimples can also be a suitable option to improve the hydrophilicity [48].…”

Section: Surface Texturingmentioning

confidence: 99%

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An Overview on the Tribological Performance of Titanium Alloys with Surface Modifications for Biomedical Applications

2019

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The need for metallic biomaterials will always remain high with their growing demand in joint replacement in the aging population. This creates need for the market and researchers to focus on the development and advancement of the biometals. Desirable characteristics such as excellent biocompatibility, high strength, comparable elastic modulus with bones, good corrosion resistance, and high wear resistance are the significant issues to address for medical implants, particularly load-bearing orthopedic implants. The widespread use of titanium alloys in biomedical implants create a big demand to identify and assess the behavior and performance of these alloys when used in the human body. Being the most commonly used metal alloy in the fabrication of medical implants, mainly because of its good biocompatibility and corrosion resistance together with its high strength to weight ratio, the tribological behavior of these alloys have always been an important subject for study. Titanium alloys with improved wear resistance will of course enhance the longevity of implants in the body. In this paper, tribological performance of titanium alloys (medical grades) is reviewed. Various methods of surface modifications employed for titanium alloys are also discussed in the context of wear behavior.

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“…Surface microtexture preparation and low surface energy modification, are the two aspects to improve surface hydrophobicity. There are many methods to fabricate micro-texture and get superhydrophobic surfaces by changing the surface morphological structures, such as shot blasting [12], chemical etching [13], machining [14], plasma etching [15], etc. However, the techniques above have some shortcomings that limit the application.…”

Section: Introductionmentioning

confidence: 99%

Superhydrophobic Surface Preparation and Wettability Transition of Titanium Alloy with Micro/Nano Hierarchical Texture

et al. 2018

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Microstructures are applied to various hydrophobic/hydrophilic surfaces due to the role of adjusting the surface wettability. In this paper, a 1064 nm pulsed picosecond laser was applied to prepare a micro/nano hierarchical structure on the surface of the titanium alloy (Ti-6Al-4V). The microstructures consist of dimple arrays with various diameters, depths, and areal densities. They are obtained by controlling the pulse energy and the number of pulses. The nanostructures are periodic ripples, which are defined as laser-induced periodic surface structure (LIPSS), and the dimensional parameter of LIPSS can be adjusted by changing the laser energy density and scanning speed. The contact angles of various laser textured surfaces were measured. It is found that the contact angle increases with the density of micro-textured surface increases, and the wetting state of textured surfaces conforms to the Cassie model. Some laser processed samples were subjected to low-temperature annealing treatment. It is observed that the low-temperature annealing process can accelerate the surface wettability transition significantly, which is attributed to the change of the hydroxyl groups on the surface. Finally, a superhydrophobic surface with the maximum contact angle of 144.58° is obtained.

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Mechanical micro-texturing of Ti-6Al-4V surfaces for improved wettability and bio-tribological performances

Cited by 71 publications

References 49 publications

Surface Characterization and Tribological Performance Analysis of Electric Discharge Machined Duplex Stainless Steel

Surface Characterization and Tribological Performance Analysis of Electric Discharge Machined Duplex Stainless Steel

An Overview on the Tribological Performance of Titanium Alloys with Surface Modifications for Biomedical Applications

Superhydrophobic Surface Preparation and Wettability Transition of Titanium Alloy with Micro/Nano Hierarchical Texture

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