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Original Articles Open Access
NiTi alloy is one of the advanced materials which have properties such as high specific strength, high corrosion resistance, biocompatibility etc. Due to such superior properties it is used in the field of aerospace, medical and defence. These field required high machining accuracy and precision. So machining of these alloys is not possible with conventional machining hence non-conventional machining processes i.e. electric discharge machining (EDM) is implemented to machined these alloy. In the present study effect of cryogenic treatment on NiTi workpiece and copper electrode is investigated. EDM performance measures viz. Material removal rate and tool wear rate are evaluated against the variation of gap current, pulse on time, pulse off time for different combinations of workpiece and tool. It is concluded that cryogenic treatment of NiTi workpiece improves the material removal rate. Also MRR and TWR increases with regards to gap current and pulse on time and declines with regard to pulse off time.
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Author(s): Vaibhav Gaikwad Vijaykumar S Jatti and T P Singh
NiTi alloy, material removal rate, tool wear rate, cryogenic treatment, cryo-treated