How to Select 2D and 3D Roughness Parameters at Their Relevant Scales by the Analysis of Covariance

Stéphane Tchoundjeu Ngatchou (1) , Maxence Bigerelle (2) , Francois Robbe-Valloire (3, 4) , Tony da Silva Botelho (3, 4) , Frédéric Jarnias (5)

1 SETVAL - Centre de Recherche VALLOUREC
2 LAMIH - Laboratoire d'Automatique, de Mécanique et d'Informatique industrielles et Humaines - UMR 8201
3 QUARTZ - Laboratoire QUARTZ
4 SUPMECA - SUPMECA - Institut supérieur de mécanique de Paris
5 CReS - TOTAL, Centre de recherche de Solaize

In this paper, a multi-scale methodology is proposed to model and characterize the effect of two lubricants on changes in surface morphology during a running-in test. The test concerns two steels samples, mounted on a twin-disc tribometer to test each of lubricants A and B for a period of 42 h. The changes are characterized by the standardized roughness parameters given in ISO 25178. A technique involving replication is used to monitor wear during the test. Using all these replication measurements, a multi-scale methodology is applied. These selected models highlighted the relevant parameters for quantifying wear during lifespan, and also showed that lubricant A was better able to preserve surface integrity during wear than lubricant B.

Mots clés: "roughness"; "lubricant"; "wear"; "pitting"

Domaines: Mécanique [physics.med-ph]

Stéphane Tchoundjeu Ngatchou, Maxence Bigerelle, Francois Robbe-Valloire, Tony da Silva Botelho, Frédéric Jarnias. How to Select 2D and 3D Roughness Parameters at Their Relevant Scales by the Analysis of Covariance. Materials, 2020, 13 (7), pp.1526. ⟨10.3390/ma13071526⟩. ⟨hal-03440999⟩