Surface modification of wire-EDMed Ti6Al4V alloy by ultrasonic assisted magnetic abrasive finishing technique

Abstract

In this study, it is aimed to remove the white layer formed on the surface of Ti6Al4V alloy as a result of Wire-Electro Discharge Machining by Magnetic Abrasive Finishing method. In the study, specimens were machined with W-EDM method under constant conditions and were machined at different levels of machining time, abrasive size, the number of revolutions and magnetic field parameters in UAMAF and MAF method. In the study in which Taguchi L18 experimental design was used, a total of 36 experiments were performed for MAF and UAMAF methods. The machined samples were examined by SEM and changes in white layer thickness were recorded. Statistical effects of processing parameters on white layer thickness were determined by the ANOVA method. As a result of the study, it was determined that the white layer thickness could decrease by 84% and 89% for the MAF and UAMAF methods, respectively. It has been also determined that ultrasonic support has a positive effect of 13.45% on average.

Effect of roller burnishing on the mechanical behavior and surface quality of Ti6Al4V alloy

“…Table 4 shows the Ra values for the specimens that were exposed to the roller burnishing process. Table 4 also shows the surface roughness improvement ratio (SRIR) which is calculated according to equation (1).…”

“…Because of these outstanding qualities, in various fields of high technology, including the manufacturing of intracorporeal implants, prosthetics, surgical instruments, nuclear boilers, aviation engine inlet vanes, and low-and high-pressure compressor blades, titanium and its alloys are employed. [1][2][3][4][5] The surface quality of the components is crucial when taking into account the applications for which titanium and its alloys, which match mechanical demands, are utilized. Nevertheless, titanium alloys are one of the classic difficult-to-machine materials due to their high chemical activity and low elastic modulus.…”

“…Because of these outstanding qualities, in various fields of high technology, including the manufacturing of intracorporeal implants, prosthetics, surgical instruments, nuclear boilers, aviation engine inlet vanes, and low- and high-pressure compressor blades, titanium and its alloys are employed. 1–5…”

Machining Performance for Ultrasonic-Assisted Magnetic Abrasive Finishing of a Titanium Alloy: A Comparison with Magnetic Abrasive Finishing

“…The experimental research on UAMAF of a titanium alloy was developed by Zhou et al The results show that the surface residual stress of the workpiece changed from a tensile stress of +280 MPa to a compressive stress of −20 MPa [8]. Çelik et al carried out the experiment on UAMAF of the white layer of the Ti6Al4V alloy formed by wire-electro-discharge machining, concluding that the white layer thickness could decrease by 89% after UAMAF [9].…”