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

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.

KEYWORDS:

• Surface quality
• tool wear
• liquid metallurgical
• flank wear
• chip morphology
• surface analysis

Disclosure statement

No potential conflict of interest was reported by the authors.

Ethical statement

The paper is the original work of all authors, has never been published, has only been submitted to this journal, and if approved, will not be submitted to any other journal in any language. It was created with the help of all authors.