Abstract
In the present study, AA7075/B4C composite is fabricated by mechanical stir casting process taking 5% boron carbide particles of average size 20-40 µm. In order to achieve improved surface properties and enhanced material removal rate, chromium particles are added in the dielectric fluid and powder mixed EDM of the composite is performed using copper electrode. Four process parameters namely current, pulse on time, pulse off time and gap voltage are considered for investigating the material removal rate (MRR). Design of experiment (DOE) has been set as per central composite rotatable design using response surface methodology (RSM). Surface characteristic such as recast layer is assessed by SEM. Comparative study of recast layer is carried out at intermediate and higher setting of process parameters. MRR is found to be a function of current, pulse on time and gap voltage. MRR is optimized using desirability approach. Confirmatory experiment is found with 8.65% deviation from predicted value of MRR.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
