Investigation on surface integrity and material transfer of Ti-6Al-7Nb alloy in Die-sinking EDM Process

Abstract

Ti-6Al-7Nb is of medium strength among remaining alloys of Ti. It`s a surgical implant device. These alloys were specially developed for medical implant devices. It has very similar properties like Ti-6Al-4V. In this alloys vanadium has been replaced with niobium material. After replacing vanadium, this new alloy has got very unique feature that’s more biocompatibility than old vanadium alloy and, it is nontoxic like Ti-6Al-4V. The Die sinking electrical discharge machining processes has been found to be a good alternative of conventional machining processes, but there is lack of data and suitable models for predicting the performance of Die sinking EDM processes particularly for Ti-6Al-7Nb alloy. In the Present work, Investigation on surface integrity and material transfer of Ti-6Al-7Nb alloy in Die-sinking EDM Process was done. The empirical modeling of process parameters of the Die sinking EDM has been carried out for the Ti-6Al-7Nb using a well known experimental design approach called response surface methodology (RSM). The parameters such as peak current, pulse-on, pulse-off and spark gap voltage have been selected as input variables keeping others constant. The performance has been measured in terms of MRR, TWR, SR, and MH.

Ti-6Al-7Nb is of medium strength among remaining alloys of Ti. It`s a surgical implant device. These alloys were specially developed for medical implant devices. It has very similar properties like Ti-6Al-4V. In this alloys vanadium has been replaced with niobium material. After replacing vanadium, this new alloy has got very unique feature that’s more biocompatibility than old vanadium alloy and, it is nontoxic like Ti-6Al-4V. The Die sinking electrical discharge machining processes has been found to be a good alternative of conventional machining processes, but there is lack of data and suitable models for predicting the performance of Die sinking EDM processes particularly for Ti-6Al-7Nb alloy. In the Present work, Investigation on surface integrity and material transfer of Ti-6Al-7Nb alloy in Die-sinking EDM Process was done. The empirical modeling of process parameters of the Die sinking EDM has been carried out for the Ti-6Al-7Nb using a well known experimental design approach called response surface methodology (RSM). The parameters such as peak current, pulse-on, pulse-off and spark gap voltage have been selected as input variables keeping others constant. The performance has been measured in terms of MRR, TWR, SR, and MH.