Evolution of the surface quality and tool wear in the high speed turning of Al2219/n-B4C/MoS2 Nano metal matrix composites

Abstract

ABSTRACT The mono metal matrix composite (MMC) (Al2219/2% n-B4C) and hybrid MMCs (Al2219 + 2% n-B4C +2% MoS2) were prepared through liquid metallurgical. An effort is made in the current study to investigate the effect of addition of molybdenum disulphide (2% MoS2) particles on tool wear. Uncoated carbide tool exhibits the highest flank wear observed during Al2219 + 2% n-B4C composite; moreover, it is due to higher cutting speed and occurrence of hard ceramics (n-B4C) particles in the nano MMCs. In the case of a hybrid composite, the presence of MoS2 particles avoids metal-to-metal contact and reduces the flank wear and during turning with coated carbide tool obtains a higher surface quality. The depth of cut is independent of the adhesion effect. The influenced zone (affected area) is higher with an increase in depth of cut; for 0.25, 0.5, 0.75 and 1.0 mm; however, the effect on surface roughness (Ra) is similar.