Dry sliding of Cu–15wt%Ni–8wt%Sn bronze: Wear behaviour and microstructures

Dry sliding wear of nanostructured Fe30Ni20Mn20Al30

“…argon. This result is consistent with the results from Bellon's group, who found the same behavior for dry sliding wear of Cu-15wt% Ni8wt% Sn tested in air or argon [14]. The explanation for this phenomenon could be that the oxide surface film is continuously breaking and forming, thus leading to a larger wear rate in oxygencontaining environments.…”

“…phase instead of the initial two-phase spinodal microstructure [13]. Later, similar wear tests were carried out at a load of 980 N in air and argon [14]. In air, severe wear started at the beginning of the tests, as in the earlier studies, while a transition from mild to severe wear occurred during the tests in argon.…”

“…In addition, although those works showed that the wear rate was reduced by 75% in Ar [14], no further study and discussion about the effect of environment were performed.…”

“…The worn surface morphology suggested a mechanism of adhesive wear. Two different types of debris were observed: 5e30 mm flaky particles with a composition the same as the nominal composition of the alloy (Cu-15 wt.% Ni-8 wt.% Sn) and w 1 mm fine debris consisting of a mixture of (Fe, Cr) 2 O 3 and (Cu, Ni, Sn)O oxides [14]. The subsurface microstructure of the wear pin was characterized in detail by employing various TEM analytical techniques, including high angle annular dark field imaging, electron energy loss spectroscopy and an energy dispersive spectrometry (EDS), in addition to conventional diffraction imaging and phase identification by diffraction contrast.…”

Microstructure and dry sliding wear resistance of CoTi intermetallic alloy

“…Noticeable subsurface plastic flow along the sliding direction occurred for the CoTi alloy under the combined action of frictional shearing, slidingshearing and repeated compression-rolling during dry sliding wear test. Many investigations indicated that severe plastic deformation might cause work hardening of the materials via those responsing mechanisms of dislocation reorganization into subgrain and grain boundaries, nucleation-controlled crystallization and grain refinement [19][20][21][22][23]. During dry sliding wear process, intense slidingshearing stress provided repeated impacts on the worn surface of CoTi alloy at a high speed and generated high-density dislocations and deformation twins in the near surface deformed regions.…”