Experimental investigation into the EDM process of γγ\gamma -TiAl

MOHAMMAD REZA SHABGARD; HOSSEIN FARAGI; BEHNAM KHOSROZADEH; KEIVAN AMINI; MIRSADEGH SEYEDZAVVAR

Makale detayları

Experimental investigation into the EDM process of γγ\gamma -TiAl

Yazarlar:

MOHAMMAD REZA SHABGARD | HOSSEIN FARAGI | BEHNAM KHOSROZADEH | KEIVAN AMINI | MIRSADEGH SEYEDZAVVAR

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Engineering and Environmental Sciences 2014 Vol.38 Issue 2, pp.231-239

Belge Tipi:

Makale

Yayın Tarihi:

1/2014

Belge Dili:

Türkçe

Document ID (Org No.):

2000744513

Sıklık:

Üç Yıllık

eISSN:

1303-6157

pISSN:

1300-0160

Özet:

 

Among the advanced materials, the γγ\gamma -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 γγ\gamma -TiAl and the effects 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 affects surface integrity of γγ\gamma -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 Ti33_{3}Al and TiC are formed on the machined surfaces.

 

Among the advanced materials, the γγ\gamma -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 γγ\gamma -TiAl and the effects 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 affects surface integrity of γγ\gamma -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 Ti33_{3}Al and TiC are formed on the machined surfaces.

Makale detayları

Experimental investigation into the EDM process of γγ\gamma -TiAl

Yazarlar: MOHAMMAD REZA SHABGARD | HOSSEIN FARAGI | BEHNAM KHOSROZADEH | KEIVAN AMINI | MIRSADEGH SEYEDZAVVAR

Yayıncı: TUBITAK

Dergi: Turkish Journal of Engineering and Environmental Sciences 2014 Vol.38 Issue 2, pp.231-239

Belge Tipi: Makale

Yayın Tarihi: 1/2014

Belge Dili: Türkçe

Document ID (Org No.): 2000744513

Sıklık: Üç Yıllık

eISSN: 1303-6157

pISSN: 1300-0160

Sayı

Yazarlar:

MOHAMMAD REZA SHABGARD | HOSSEIN FARAGI | BEHNAM KHOSROZADEH | KEIVAN AMINI | MIRSADEGH SEYEDZAVVAR

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Engineering and Environmental Sciences 2014 Vol.38 Issue 2, pp.231-239

Belge Tipi:

Makale

Yayın Tarihi:

1/2014

Belge Dili:

Türkçe

Document ID (Org No.):

2000744513

Sıklık:

Üç Yıllık

eISSN:

1303-6157

pISSN:

1300-0160