Study on mechanical properties of AMMC and optimization of WEDM process parameters
DOI:
https://doi.org/10.58368/MTT.22.9-10.2023.10-26Keywords:
WEDM, MRR, GRA, ANOVAAbstract
The combination of Al7475 base metal and 3% wt. of Boron Nitride, Titanium carbide and Tungsten carbide reinforcements as Metal matrix composites are developed in the current experiment with stir casting process. Up to 1% wt. BN improves mechanical properties beyond this limit, the properties declined due to presence of porosity. The Tensile, Compression, hardness and electrical conductivity of the composites were tested and results compared. Taguchi’s design of experiments (L9) were conducted to optimize the Wire Electrical Discharge Machining (WEDM) process parameters i.e., Pulse on (ToN), Pulse off (Toff), Input current (I/c) and Wire feed (Wf) to regulate output responses of Kerf width (Kw) and Metal Removal Rate (MRR). With the help of Grey Relational Analysis (GRA), the optimal values for both MRR and Kerf width were determined as pulse on-95 sec, pulse off -30 sec, input current-1Amperes and wire feed-25 m/min. By analyzing the ANOVA results, it is determined that the input current has the most influencing parameter with contribution of 63.67%.
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References
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