The influence of stacking fault energy on the wear resistance of nickel base alloys
1997; Elsevier BV; Volume: 209; Issue: 1-2 Linguagem: Inglês
10.1016/s0043-1648(97)00010-0
ISSN1873-2577
AutoresDilip K. Chaudhuri, Ding Xie, Anantha N. Lakshmanan,
Tópico(s)Advanced materials and composites
ResumoAn effort has been made in the present investigation to correlate the deformation and sliding wear resistance of a series of nickel-cobalt and nickel-copper single phase, fcc, solid-solution alloys with their stacking fault energy (SFE) by conducting reciprocating sliding wear tests against a diamond ball in ambient air. The surface damage has been characterized through scanning electron microscopy and X-ray photoelectron spectroscopy. For the nickel-cobalt alloys the measured wear rates were found to be mostly controlled by work-hardening and fatigue fracture of the near surface region and a good correlation was obtained between the wear rates and the SFE of these alloys. The same trend has also been observed in nickel-copper alloys having less than 50 wt.% copper. In higher alloy compositions, however, it was found that the influence of SFE on the wear rate is overshadowed by the beneficial lubricating effect of build-up of copper oxides on the wearing alloy surface.
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