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Open AccessArticle

Drilling of Hybrid Titanium Composite Laminate (HTCL) with Electrical Discharge Machining

Department of Mechanical Engineering, University of Washington, Seattle, WA 98195, USA
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Author to whom correspondence should be addressed.
Academic Editor: Daolun Chen
Materials 2016, 9(9), 746; https://doi.org/10.3390/ma9090746
Received: 14 July 2016 / Revised: 13 August 2016 / Accepted: 24 August 2016 / Published: 1 September 2016
(This article belongs to the Special Issue Machining of Composites and Multi-Stacks of Aerospace Materials)
An experimental investigation was conducted to determine the application of die sinker electrical discharge machining (EDM) as it applies to a hybrid titanium thermoplastic composite laminate material. Holes were drilled using a die sinker EDM. The effects of peak current, pulse time, and percent on-time on machinability of hybrid titanium composite material were evaluated in terms of material removal rate (MRR), tool wear rate, and cut quality. Experimental models relating each process response to the input parameters were developed and optimum operating conditions with a short cutting time, achieving the highest workpiece MRR, with very little tool wear were determined to occur at a peak current value of 8.60 A, a percent on-time of 36.12%, and a pulse time of 258 microseconds. After observing data acquired from experimentation, it was determined that while use of EDM is possible, for desirable quality it is not fast enough for industrial application. View Full-Text
Keywords: EDM; HTCL; machinability; TiGr; thermoplastic composites EDM; HTCL; machinability; TiGr; thermoplastic composites
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Ramulu, M.; Spaulding, M. Drilling of Hybrid Titanium Composite Laminate (HTCL) with Electrical Discharge Machining. Materials 2016, 9, 746.

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