The present study focuses on the influence of the PEO (Plasma Electrolytic Oxidation) treatment on the tribological behaviour of the AA2618/20 % vol. Al2O3p composite, dry sliding against induction hardened UNI C55 steel. Particle-reinforced Al based composites offer a higher wear resistance by comparison with the corresponding unreinforced alloys, however, the presence of critical loads and/or velocities which lead to transition towards severe wear regime, was often observed. In such conditions, the composite can show higher wear rates than those of unreinforced alloys. For this reason, surface modifications, such as PEO, might contribute to improve wear resistance. In this paper, topography, microstructure, phase constitution and surface hardness of the PEO-treated composite were investigated and its tribological behaviour was studied by dry sliding tests using a block-on-ring tribometer. The results were compared with those from the uncoated composite, demonstrating a very positive effect of the PEO treatment, which moved transitions from mild to severe wear towards more severe test conditions, in terms of both load and velocity.

L. Ceschini, C. Martini, G. Sambogna, F. Tarterini (2011). DRY SLIDING BEHAVIOUR OF PEO (PLASMA ELECTROLYTIC OXIDATION) TREATED AA 2618/20 % Al2O3P COMPOSITE. Zurich : Trans Tech Publications Ltd [10.4028/www.scientific.net/MSF.678.61].

DRY SLIDING BEHAVIOUR OF PEO (PLASMA ELECTROLYTIC OXIDATION) TREATED AA 2618/20 % Al2O3P COMPOSITE

CESCHINI, LORELLA;MARTINI, CARLA;SAMBOGNA, GIULIANO;TARTERINI, FABRIZIO
2011

Abstract

The present study focuses on the influence of the PEO (Plasma Electrolytic Oxidation) treatment on the tribological behaviour of the AA2618/20 % vol. Al2O3p composite, dry sliding against induction hardened UNI C55 steel. Particle-reinforced Al based composites offer a higher wear resistance by comparison with the corresponding unreinforced alloys, however, the presence of critical loads and/or velocities which lead to transition towards severe wear regime, was often observed. In such conditions, the composite can show higher wear rates than those of unreinforced alloys. For this reason, surface modifications, such as PEO, might contribute to improve wear resistance. In this paper, topography, microstructure, phase constitution and surface hardness of the PEO-treated composite were investigated and its tribological behaviour was studied by dry sliding tests using a block-on-ring tribometer. The results were compared with those from the uncoated composite, demonstrating a very positive effect of the PEO treatment, which moved transitions from mild to severe wear towards more severe test conditions, in terms of both load and velocity.
2011
Advances in Metal Matrix Composites
61
74
L. Ceschini, C. Martini, G. Sambogna, F. Tarterini (2011). DRY SLIDING BEHAVIOUR OF PEO (PLASMA ELECTROLYTIC OXIDATION) TREATED AA 2618/20 % Al2O3P COMPOSITE. Zurich : Trans Tech Publications Ltd [10.4028/www.scientific.net/MSF.678.61].
L. Ceschini; C. Martini; G. Sambogna; F. Tarterini
File in questo prodotto:
Eventuali allegati, non sono esposti

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/96781
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 5
  • ???jsp.display-item.citation.isi??? 5
social impact