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The tribological behavior evolution of TiB2/Al composites from running-in stage to steady stage.
- Source :
-
Wear . Dec2016, Vol. 368-369, p304-313. 10p. - Publication Year :
- 2016
-
Abstract
- The purpose of this study was to investigate the characteristics of a friction and wear transition from the running-in stage to the steady-state stage for an Al-based composite containing TiB 2 particles and fabricated by a pressure infiltration technique. The dry sliding friction and wear behavior was investigated using a 3.98 mm diameter AISI 52100 steel ball-on-disk geometry under applied loads of 1 N and 3 N. Microstructural characterization and element distribution were carried out using scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDS). 3D surface topographies and roughness of the wear surfaces were measured using confocal laser scanning microscopy (CLSM). The results indicated that the formation of a transfer film and boric acid (H 3 BO 3 ) was the main reason for the low friction coefficient of about 0.16 at a load of 1 N. An increase of friction coefficient was caused by the abrasion of pulled-out TiB 2 particles. In the running-in stage at an applied load of 3 N, abrasive wear dominated and resulted in the formation of grooves and pulled-out TiB 2 particles. In addition, at a steady-stage friction coefficient of 0.6, severe three-body abrasive wear and oxidative wear were the dominant wear mechanisms. An excellent correlation was found between friction coefficient and surface roughness, as measured by 3D topography. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00431648
- Volume :
- 368-369
- Database :
- Academic Search Index
- Journal :
- Wear
- Publication Type :
- Academic Journal
- Accession number :
- 119777075
- Full Text :
- https://doi.org/10.1016/j.wear.2016.10.003