Multi-scale characteristics lengths of abraded surfaces - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Tribology International Année : 2011

Multi-scale characteristics lengths of abraded surfaces

Résumé

The abrasion mechanisms in polishing titanium-alloy samples with different grades of silicon carbide-coated abrasives were characterized using a novel multiscale analysis of the extreme amplitudes of the peaks and valleys (EAPV) of surface roughness. Two stages of roughness were found: a fractal stage (l∈10–160 μm), where EAPV values versus the observation length l were linked to the fractal dimension D (EAPV∝l2−D), and a stochastic stage (l>160 μm), where EAPV was modeled by the extreme-value theory, allowing the prediction of EAPV values versus observation length. Three regimes of abrasion were found: for grit particles of diameter d>100 μm, EAPV values did not depend on the observation scale and were consistent with Archard’s model. For particle sizes 10 μm160 μm, by a cumulative-damage model, with a probability proportional to the length of the sample but always uncorrelated with scale.

Dates et versions

hal-00578253 , version 1 (18-03-2011)

Identifiants

Citer

M. Bigerelle, S. Giljean, T.G. Mathia. Multi-scale characteristics lengths of abraded surfaces. Tribology International, 2011, 44 (1), pp.63-80. ⟨10.1016/j.triboint.2010.08.002⟩. ⟨hal-00578253⟩
31 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Mastodon Facebook X LinkedIn More