Investigating the efficiency of mixtures based on supercritical CO2 and lubricants by friction tests under conditions similar to the machining of Ti6Al4V
Article dans une revue avec comité de lecture
Author
KOULEKPA, Koffi SamuelBENKED-DAR, Chadi ELIAS-BIREMBAUX, Hélène L.ROSSI, FREDERICPOULACHON, GerardAbstract
New supercritical carbon dioxide (scCO2)-based cutting fluids combining the cooling from scCO2 and lubrication from various additives are investigated in this study. Selected components, including ionic liquids, vegetable and mineral oils, water, and PEG, were introduced into supercritical CO2, and tribological tests were performed on a CNC lathe to analyze their influence on Ti6Al4V/WC-Co contact. Forces and temperatures were recorded to compare the perfomances of the scCO2-lubricant mixtures for future use in machining. The analysis of the apparent friction coefficient and sticking zone showed a noticeable decrease by ionic liquids when combined with scCO2 at a speed of 100 m/min and 4 mL/min delivery flow rate. The other lubricants (water and PEG vegetable oils) performed similarly to standard mineral oil and are less expensive, which could help in developing future low-cost yet effective cooling and lubrication methods for the machining industry.
Files in this item
This document is available under CC BY license
Collections
Related items
Showing items related by title, author, creator and subject.
-
Communication avec acteKOFFI SAMUEL, KOULEKPA; ; ELIAS-BIREMBAUX, Hélène L.; ; (Proceedings of the Machining Innovations Conference for Aerospace Industry (MIC) 2023, 2023-11-29)
In order to face the challenges in machining difficult-to-cut materials as nickel and titanium alloys, many cooling methods have been developed through the years, among which is the usage of supercritical carbon dioxide ...
-
Article dans une revue avec comité de lecture; ; ; ;ELIAS-BIREMBAUX, Hélène L.; ; ; (2021)
During machining, most of the thermal sources are resulting from the conversion of mechanical energy during the chip shearing mechanism and the intense frictions between the tool, the chip, and the machined surface. Thermal ...
-
Communication avec acte;CHERIF, Mehdi; CALAMAZ, Madalina; ELIAS-BIREMBAUX, Hélène L.; ; ; AYED, Yessine (Elsevier BV, 2023)
This paper presents a novel 3D numerical model of drilling CFRP to evaluate the degradation of mechanical properties in the hole surfaces. It can be used to determine the change of functional performance induced by accumulated ...
-
Article dans une revue avec comité de lecture; ;AYED, Yessine; ; ; (Springer Science and Business Media LLC, 2021-10-19)
Hole shrinkage is a common phenomenon in drilling difficult-to-cut materials like Ti6Al4V due to their poor thermal properties and high elasticity, which can lead to increase in tool wear and decrease in surface integrity. ...
-
Article dans une revue avec comité de lecture;AYED, Yessine; ; ; (Elsevier BV, 2022-03-21)
Titanium alloys are widely used in aerospace industries due to their excellent physical and mechanical performances, however, their poor machinability always induce fast tool wear. To better understand the interaction ...