Enhancing Corrosion and Wear Resistance of Ti6Al4V Alloy Using CNTs Mixed Electro-Discharge Process

Abstract

This paper presents wear and corrosion resistance analysis of carbon nanotubes coated with Ti-6Al-4V alloy processed by electro-discharge treatment. The reported work is carried out using Taguchi’s L18 orthogonal array to design the experimental matrix by varying five input process parameters i.e., dielectric medium (plain dielectric, multi-walled carbon nanotubes (MWCNTs) mixed dielectric), current (1–4 A), pulse-on-time (30–60 µs), pulse-off-time (60–120 µs), and voltage (30–50 V). The output responses are assessed in terms of microhardness and surface roughness of the treated specimen. X-ray diffraction (XRD) spectra of the coated sample reveal the formation of intermetallic compounds, oxides, and carbides, whereas surface morphology is observed using scanning electron microscopy (SEM) analysis. For the purpose of the in-vitro wear behavior of treated samples, the surface with superior microhardness values in plain dielectric and MWCNTs mixed dielectric is compared using a pin-on-disc type wear test. Furthermore, electrochemical corrosion test is also conducted to portray the dominance of treated substrate of Ti-6Al-4V alloy for biomedical applications. It is concluded that the wear-resistant and the corrosion protection efficiency of the MWCNTs treated substrate enhanced to 95%, and 96.63%, respectively.

Titanium alloy composited with dual-cytokine releasing polysaccharide hydrogel to enhance osseointegration via osteogenic and macrophage polarization signaling pathways

“…Then, the degradation and drug release behavior for HQ hydrogel were assessed. Since Ti6Al4V implants are non-degradable due to corrosion resistance and persistently present in the human body [ 28 ], the degradation of HQ hydrogel alone was determined. Figure 1J showed that HQ hydrogel displayed a time-dependent degradation profile.…”

A novel Cu-Gr composite electrode development for electric discharge machining of Inconel 718 alloy

“…According to the literature review, homogeneous dispersion of composites was key to improving machining efficiency [31,32]. The distribution of reinforcing particles was analyzed utilizing the EDS with mapping as shown in the figure 2.…”

Assessing the Effects of Uncoated and Coated Electrode on Response Variables in Electrical Discharge Machining for Ti-6Al-4V Titanium Alloy

“…The study portrayed the potential of the EDM input parameters for improving the MRR and surface quality of Co-Cr alloy and DSS alloy [21]. Power mixed EDM and its influence on machining performance were studied for various workpiece materials [22][23][24][25].…”