Abstract
This experimental investigation aimed to investigate the machinability of 10 wt.%t Fly Ash reinforced Aluminium Alloy (AA7475) composite and compare with Aluminium Alloy (AA7475) minimize the surface roughness in CNC contour milling of Aluminium alloy, AA7475. The composite was fabricated by the Stir casting method with 90 % of base material AA7475 and 10 % of (Fly Ash) reinforcement material. After the reinforced composite was then cast into a flat plate and further sliced into pieces. The sample size is 32 (16 for each group) with a pretest ‘G’ power setting of 80 %. The prepared samples were machined by CNC contour milling, the samples including both groups such as 10 wt.%t Fly Ash reinforced aluminium alloy (AA7475) composite and aluminium alloy (AA7475). For research, green manufacturing approaches are preferred. Surface roughness testing was carried out by using a Profilometer in all machined specimens. Surface roughness values were obtained for both 10 wt% Fly Ash reinforced aluminium alloy (AA7475) composite and aluminium alloy (AA7475) machined specimens, and T-tests were performed using SPSS. The significance value obtained was 0.04 (p < 0.05). Within the constraints of this study, 10 wt% Fly Ash reinforced aluminium alloy (AA7475) recorded the minimum average surface roughness of 19.48 % in CNC Green Machining in specific contour milling for the reinforced composite (AA7475 + Fly Ash) compared with plain aluminium alloy (AA7475).
Published Version
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