Impact of MoS2 solid lubricant on surface integrity of Ti-6Al-4V with PVD-TiN coated tool in drilling

Ti-6Al-4V is a superior performance alloy and progressively observing boundless use in aerospace and medical industries. Machining of this alloy is extremely troublesome because of its meagre thermal conductivity, reactive nature with tool material and high work hardening. This examination meant to...

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Bibliographic Details
Published in:Journal of the Brazilian Society of Mechanical Sciences and Engineering 2021-08, Vol.43 (8), Article 380
Main Authors: Velmurugan, V., Manimaran, G., Ross, K. Nimel Sworna
Format: Article
Language:English
Subjects:
Aerospace industry
Chip formation
Cutting wear
Drilling
Engineering
Machining
Mechanical Engineering
Microhardness
Molybdenum disulfide
Solid lubricants
Surface properties
Surface roughness
Technical Paper
Thermal conductivity
Titanium base alloys
Tool wear
Work hardening
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Summary:Ti-6Al-4V is a superior performance alloy and progressively observing boundless use in aerospace and medical industries. Machining of this alloy is extremely troublesome because of its meagre thermal conductivity, reactive nature with tool material and high work hardening. This examination meant to assess the improvement in surface attributes in the drilling of Ti-6Al-4V when applying MoS 2 -SL and comparing that with a mixture of MoS 2  + olive pomace oil (MQSL) and dry cutting strategy. The responses noted for this examination were surface roughness, cutting temperature, tool wear, chip formation and microhardness. Findings were affirmed by involving the conduction of chip investigation. The demonstrated outcomes indicated that 35% and 24% of generated heat decreased with MoS 2 -SL over dry and MQSL cutting. The solid lubricant moves along with the insert while drilling, which brought sufficient cooling impact at the cutting region. Decrease of chip thickness with MoS 2 -SL was discovered to be 4–16% and 3–7% over dry and MQSL environment. Paugh matrix environmental methodology has been utilized to establish the sustainability assessment among the deployed environmental strategies. Finally, drilling operation with various environmental conditions showed the superiority of MoS 2 -SL in reducing tool wear by escalating the surface quality.
ISSN:1678-5878
1806-3691
DOI:10.1007/s40430-021-03098-y