Machining of B1914 nickel-based superalloy using wire electrical discharge machining

Abstract

The unconventional technology of wire electrical discharge machining is a key engineering technology, designed primarily for machining of conventionally difficult machine materials. One of them is nickel alloys, which are majorly used in the aerospace and energy industries. The subject of research in this study was specifically the B1914 nickel-based superalloy, which was subjected to many analyses leading to an overall optimization of its machining using wire electrical discharge machining. In order to determine the effect of machine parameters setup (pulse off time, gap voltage, discharge current, pulse on time and wire feed) on cutting speed, topography, morphology, surface and subsurface layer quality, an extensive Box–Behnken design experiment consisting of 46 rounds was carried out. The analyses of the condition of the surface and subsurface layers were performed, including their chemical composition and changes caused by wire electrical discharge machining. It was found out that the factors like pulse off time, discharge current and pulse on time have the greatest effect on the cutting speed, although from the point of view of surface topography the parameter pulse off time is not significant. The remaining two parameters cause the cutting speed to act against the surface topography i.e. with the increasing cutting speed, the surface topography gets worse and vice versa.

Experimental Investigation into the Influence of the Process Parameters of Wire Electric Discharge Machining Using Nimonic-263 Superalloy

“…The design of the experiment utilized the selection of the parameters that had the greatest influence on the production process and its outputs and the determination of their optimal values [32]. The current study used the Taguchi orthogonal array (OA) approach using the MINITAB 18 Software to arrange the factors impacting the process and their levels for the machining of the Nimonic-263 alloy utilizing the WEDM process.…”

Comparison of machinability of nickel alloys using WEDM

“…The occurrence of defects is a major shortcoming affecting the expected life or proper functionality of the component. This study builds on and draws on the findings of previous studies on WEDM machining of individual materials such as Hardox, 7 Mar-M247, 8 Creusabro, 9 nickel alloy B1914 10 or aluminium alloy 7475-T7351. 11 The findings presented in this study will be used primarily for the development of WEDM machining in the aerospace, automotive and energy industries.…”

A hybrid algorithm for adjusting the input parameters of the wirecut EDM machine in order to obtain maximum customer satisfaction

“…Wire-cut EDM is widely used for the production of metal components, especially for materials of great hardness that are difficult to machining by use of the other techniques [1,2]. This technique raises manufacturing capabilities, improves quality, and speeds up operations.…”