Research Information System
Thesis Type: Postgraduate
Institution Of The Thesis: Gazi Üniversitesi, Fen Bilimleri Enstitüsü, Turkey
Approval Date: 2017
Student: AHAD KHABBAZ BAVIL
Supervisor: GÖKHAN KÜÇÜKTÜRK
Abstract:Ti6Al4V ELI and AISI 316L stainless steels have excellent properties like high corrosion resistance. These properties increase the usage of them in industry rapidly. In this study, Ti6Al4V ELI alloy and AISI 316L stainless steel samples were micro deep-hole drilled (L/D=20, D=0.5mm) to determine machining characteristics by electrical discharge machining process. This study analyzes and compares the drilled holes characteristics such as machined surface topography, EDS analysis, crack density on machined surface, hardening amount of machined surface, surface finish, material removal rate, tool wear rate and dimensional accuracy or radial overcut to displays the effect of material type as the work-piece on the hole drilling process by electrical discharge machining at the different process parameters. It was found that the discharge current is the most effective parameters that effect machining characteristics directly. It is determined that there is an optimum duty factor for reaching desired processing criterion for each machining characteristics in machining each material at different set of process parameters. It is determined that tool rotation speed (n) and dielectric pressure (P) have remarkable effects on dielectric circulation in the working gap and as a result it improves machining efficiency, whereas it increases the amount of tool rotation speed (n) and dielectric pressure (P) having negative effects on the formation of plasma channel and its stability. The close amounts for material removal rate, tool wear rate, surface finish and radial overcut which is measured during electro discharge machining of Ti6Al4V ELI and AISI 316L stainless steel showed that the machinability of them are close to each other, but by considering all the results the machinability of Ti6Al4V ELI is better.