Chiang Mai Journal of Science

     The demand for materials arises to improve the effi ciency of the structural, aerospace and automotive components. It induces to identifi cation and production of composite materials. Amongst the varieties, Aluminium Metal Matrix Composite is widely used in automotive and aerospace industries because if inheriting wide range of acceptable mechanical and tribological properties besides being constructive by holding high strength to weight ratio. Herein, ED machining properties of cryogenic treated AA7075-B₄C composites were analysed. B₄C particles reinforced Aluminium metal matrix composites were prepared by using one of the liquid metrological method viz. stir casting. The samples were cryogenically treated at various soaking time periods (12, 24 & 36 hours). In ED Machining, material removal (MR) rate, tool wear (TW) rate and surface roughness (Ra) parameters were analysed depending upon the inputs viz. soaking time (SoT), electrode gap (Gap), current, P_on (pulse ON time), P_off (pulse OFF time). Experimentation remarks that current be one of the mostly infl uencing parameter towards ED machining than any other considerations in this part of research.