Title of article :
Experimental investigation into the EDM process of γ-TiAl
Author/Authors :
SHABGARD, Mohammadreza university of tabriz - Faculty of Mechanical Engineering - Department of Manufacturing, تبريز, ايران , FARAJI, Hossein university of tabriz - Faculty of Mechanical Engineering - Department of Manufacturing, تبريز, ايران , KHOSROZADEH, Behnam university of tabriz - Faculty of Mechanical Engineering - Department of Manufacturing, تبريز, ايران , AMINI, Keivan University of Windsor - Department of Mechanical, Automotive, and Materials Engineering, Canada , SEYEDZAVVAR, Mirsadegh university of tabriz - Faculty of Mechanical Engineering - Department of Manufacturing, تبريز, ايران
Abstract :
Among the advanced materials, the γ-TiAl intermetallic compounds, due to their unique properties, are being gradually employed instead of nickel base super alloys, titanium alloys, and other high temperature alloys in the aerospace and automotive industries. These properties include maintaining high strength and creep resistance at elevated temperatures. Considering the features of this material and the limitations of traditional machining procedures, in this paper the results of utilizing the EDM process for γ-TiAl and the e ects of input parameters, including discharge current and discharge duration, on output characteristics, comprising material removal rate, tool wear ratio, surface texture, and compositions and phases of machined surfaces, are presented. The results show that the EDM process a ects surface integrity of γ-TiAl and causes the formation of surface cracks even at the lowest level of discharged energy. The increase in the discharge energy results in the formation of longer cracks with wider mouths. Due to the ingress of carbon and oxygen on the surface of the specimen, initial compositions and phases of machined surfaces are changed and brittle phases such as Ti3 Al and TiC are formed on the machined surfaces.
Keywords :
γ , TiAl , EDM , material removal rate , tool wear rate , Ra , X , ray diffraction method , EDS , scanning electron microscopy
Journal title :
Turkish Journal of Engineering and Environmental Sciences
Journal title :
Turkish Journal of Engineering and Environmental Sciences