Comparison of machinability of nickel alloys using WEDM

Abstract

Heat resistance, heat stableness and corrosion resistance are properties that predispose nickel superalloys such as Inconel 625, Mar-M247, Nimonic C 263 and B1914 to a very wide range of applications. Due to their mechanical properties, their machinability by conventional technologies is relatively difficult, so wire electrical discharge machining (WEDM) is widely used, where only one condition is placed on the material being machined, which is at least minimal electrical conductivity. Despite the fact that the main element of which these superalloys are always composed is nickel, their machinability by WEDM is quite different. For this reason, an extensive study comparing the machinability of the four above-mentioned nickel superalloys using WEDM was performed, examining the effect of setting the machine parameters on the cutting speed as well as on the quality of the surface and subsurface layer. It was found out that the cutting speed is different for individual materials with the same set of machine parameters and so that it is possible to significantly increase the quality of the machined surface for individual materials.

Wire-EDM performance and surface integrity of Inconel 718 with unique microstructural features fabricated by laser powder bed fusion

“…Many studies have been conducted to optimize the process parameters of WEDM in terms of material removal rate (MRR), roughness, eroded residuals, etc. [15,[19][20][21][22]. However, there is still a lack of understanding of the effect of microstructural features of additively manufactured IN718, including crystallographic orientation, grain size, and grain boundary, on WEDM performance and machined surface properties.…”

Probabilistic investigation of geometric responses in Wire EDM machined complex-shaped profile: A machine learning based approach

“…As a result, the usage of advanced machining technologies has increased, as these processes encourage non-contact machining. [1][2][3][4][5] Wire electric discharge machining is an advanced machining technique which is extremely popular in industries for producing parts with high accuracy and precision. 6,7 However, due to deflection of the wire, such accuracy and precision cannot be attained in small-arced corners and curved profiles, but limited to straight cuts only.…”