Research Information System
Thesis Type: Postgraduate
Institution Of The Thesis: Gazi University, Turkey
Approval Date: 2017
Thesis Language: Turkish
Student: Duran Kaya
Supervisor: GÖKHAN KÜÇÜKTÜRK
Abstract:Ti6Al4V alloy is a material that is becoming widespread in many sectors due to its characteristics such as high specific strength, low elastic modulus, high alloying tendency, high corrosion resistance and biocompatibility properties. In addition to this, Ti6AL4V is difficult to process with conventional manufacturing methods. In this study, as main machining methods, Ti6Al4V workpieces were processed by using nonconventional manufacturing methods such as Abrasive Water Jet Machining, Laser Beam Machining and Wire Electro Discharge Machining, and by using conventional milling methods. Machined surfaces were post processed by shot peening. The effects of primary and secondary processing were examined in terms of surface integrity. Surface roughness, micro hardness and micro structure of workpieces were investigated within the scope of surface finish. Surface roughness and micro hardness results were shown graphically. Microstructure investigation was evaluated with the help of micro-photographs taken using an optical microscope and a scanning electron microscope. In addition, element analysis were performed only on the surfaces of the workpieces processed with nonconventional manufacturing methods, using energy distribution spectrometry. These results were compared and interpreted before and after shot peening. Surface roughness, micro hardness and surface microstructure were evaluated together after Shot Peening. It was found that the workpiece processed with five passes in Wire Electro Discharge Machining has the best surface integrity and the workpiece processed with Laser Beam Machining using nitrogen as the auxiliary gas has the worst surface integrity.