Tribology of metal cutting: newly formed underside of chip

Article dans une revue avec comité de lecture
Auteur
GREGORIO, A.
234799 Instituto Superior Técnico, Universidade Técnica de Lisboa
SANTOS, T.
244430 Universidade Federal de Santa Maria = Federal University of Santa Maria [Santa Maria, RS, Brazil] [UFSM]
ROSSI, R.
302610 Universidade Federal do Rio Grande do Sul [Porto Alegre] [UFRGS]
JESUS, A.M.P.
OUTEIRO, José
127742 Laboratoire Bourguignon des Matériaux et Procédés [LABOMAP]
ROSA, P.A.R.
234799 Instituto Superior Técnico, Universidade Técnica de Lisboa

URI
http://hdl.handle.net/10985/18214
DOI
10.1016/j.procir.2019.04.034
Date
2019
Journal
Procedia CIRP

Résumé

This investigation provides comprehensive knowledge regarding metal cutting tribology with the purpose of re-examining the role of Oxygen in the process mechanics. Special purpose apparatus and tribological tools were designed and used to conduct experimental cutting tests on pure metals under Oxygen-rich surrounding medium. It was observed that chip curl, sticking and sliding zones are intimately connected with Oxygen concentration. The main research contribution of this study however, is the assessment of friction coefficient as a function of the process parameters, rather than a constant numeric value, resulting from complex phenomena at the contact interface between the cutting tool and the underside of the newly formed chip.

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