CO2 cryogenic milling of Inconel 718: cutting forces and tool wear

Machining Inconel 718 alloy is a challenge due to its low machinability. This thermal resistant alloy combines high strength even at high temperatures with strain hardening tendency that causes high forces and extreme cutting temperatures during the machining. These issues force industries to achiev...

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Bibliographic Details
Published inJournal of materials research and technology Vol. 9; no. 4; pp. 8459 - 8468
Main Authors Pereira, Octavio, Celaya, Ainhoa, Urbikaín, Gorka, Rodríguez, Adrián, Fernández-Valdivielso, Asier, Lacalle, L. Noberto López de
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.07.2020
Elsevier
Subjects
Carbon dioxide
Cryogenic milling
CryoMQL
Environmental milling
Inconel 718
Environmental milling
Cryogenic milling
Inconel 718
CryoMQL
Carbon dioxide
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Summary:Machining Inconel 718 alloy is a challenge due to its low machinability. This thermal resistant alloy combines high strength even at high temperatures with strain hardening tendency that causes high forces and extreme cutting temperatures during the machining. These issues force industries to achieve suitable machining processes to deal with this kind of alloys and the high worldwide competitiveness. Nevertheless, environmental considerations must to be taken into account due to growing environmental concerns. In the work here presented, cryogenic cooling with external MQL lubrication (CryoMQL) working along with CO2 as internal coolant is proposed for milling Inconel 718 with the aim of not only improving from a technical point of view but also environmental. This technique was compared with other lubricooling techniques. The results show that internal CryoMQL improves tool life by 57% in comparison with emulsion coolant, achieving 120% if it is compared with MQL in stand-alone mode.
ISSN:2238-7854
DOI:10.1016/j.jmrt.2020.05.118